Pub Date : 2025-02-01DOI: 10.1016/j.solidstatesciences.2024.107801
Zhiwei Wen , Tao Jia , Yusen Xiao , Yong Li , Yajing Cui , Shulong Li , Yong Zhao , Yongliang Chen
In this paper, high quality tetragonal phase FeSe0.98 single crystals of 2 × 5 × 0.2 mm3 are synthesized using chemical vapor transport method with seed crystals. Magnetic measurements indicated that the obtained FeSe0.98 single crystals have a sharp superconducting transition at 9 K. The magnetic hysteresis loops are symmetric, without second peak effect. The critical current density is 2.4 × 104 A/cm2. The resistivity measurements revealed the presence of an electronic nematic order transition associated with the structural transition at 88 K. This transition is robust to magnetic fields. The limit temperature of superconducting fluctuation (T ∗) is determined to be around 2.15 times larger than Tc, suggesting that the superconducting fluctuation of FeSe is a large one. The in-plane coherence length is 4.97 nm.
{"title":"Synthesis and superconductivity of high-quality FeSe0.98 single crystals","authors":"Zhiwei Wen , Tao Jia , Yusen Xiao , Yong Li , Yajing Cui , Shulong Li , Yong Zhao , Yongliang Chen","doi":"10.1016/j.solidstatesciences.2024.107801","DOIUrl":"10.1016/j.solidstatesciences.2024.107801","url":null,"abstract":"<div><div>In this paper, high quality tetragonal phase FeSe<sub>0.98</sub> single crystals of 2 × 5 × 0.2 mm<sup>3</sup> are synthesized using chemical vapor transport method with seed crystals. Magnetic measurements indicated that the obtained FeSe<sub>0.98</sub> single crystals have a sharp superconducting transition at 9 K. The magnetic hysteresis loops are symmetric, without second peak effect. The critical current density is 2.4 × 10<sup>4</sup> A/cm<sup>2</sup>. The resistivity measurements revealed the presence of an electronic nematic order transition associated with the structural transition at 88 K. This transition is robust to magnetic fields. The limit temperature of superconducting fluctuation (<em>T</em> ∗) is determined to be around 2.15 times larger than <em>T</em><sub>c</sub>, suggesting that the superconducting fluctuation of FeSe is a large one. The in-plane coherence length is 4.97 nm.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"160 ","pages":"Article 107801"},"PeriodicalIF":3.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143093217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
New structure of Na3Yb(BO3)2 has been synthesized for the first time using a solid-state reaction method. The crystal structure of the title compound was elucidated using a simulated annealing method. Samples used in powder diffraction analysis for structure determination were prepared via solid-state synthesis. To refine obtained crystal structure, the Rietveld method was applied, yielding the following parameters: triclinic symmetry (sp. gr. P .), a = 5.1661(1) Å, b = 6.6249(2) Å, c = 8.5991(2) Å, α = 92.089(1)°, β = 93.281(2)°, γ = 88.010(1)°, Z = 2, V = 293.47(1) Å3, Rwp = 4.83, GOF = 4.85. The double borate Na3Yb(BO3)2 congruently melted at 1119 °C exhibited a complex thermal profile, as evidenced by DSC, with four polymorphic transitions observed at 277 °C, 497 °C, 653 °C, and 694 °C. Ab initio calculated IR spectrum of Na3Yb(BO3)2, exhibited a high degree of agreement with the experimentally obtained IR spectrum. The band gap of the title compound was calculated to be 4.7(2) eV using the combination of the Tauc method and DASF method. The calculated energy barrier for sodium ion migration, equal to 0.5 eV, was in a reasonable agreement with the experimentally determined activation energy of 0.75 eV. The title compound exhibited an ionic conductivity of 0.4 × 10−3 S/cm at 1023 K.
{"title":"A new structure type of the Na3Yb(BO3)2: Synthesis, crystal structure, thermal behavior, ionic conductivity, and spectroscopy","authors":"Alexey Subanakov , Evgeniy Kovtunets , Tatyana Spiridonova , Andrey Sobolev , Maxim Molokeev , Dmitry Sofich , Alexandr Bogdanov , Bair Bazarov","doi":"10.1016/j.solidstatesciences.2024.107821","DOIUrl":"10.1016/j.solidstatesciences.2024.107821","url":null,"abstract":"<div><div>New structure of Na<sub>3</sub>Yb(BO<sub>3</sub>)<sub>2</sub> has been synthesized for the first time using a solid-state reaction method. The crystal structure of the title compound was elucidated using a simulated annealing method. Samples used in powder diffraction analysis for structure determination were prepared via solid-state synthesis. To refine obtained crystal structure, the Rietveld method was applied, yielding the following parameters: triclinic symmetry (sp. gr. <em>P</em> <span><math><mover><mn>1</mn><mo>¯</mo></mover></math></span>.), <em>a</em> = 5.1661(1) Å, <em>b</em> = 6.6249(2) Å, <em>c</em> = 8.5991(2) Å, <em>α</em> = 92.089(1)°, <em>β</em> = 93.281(2)°, <em>γ</em> = 88.010(1)°, Z = 2, V = 293.47(1) Å<sup>3</sup>, <em>R</em><sub><em>wp</em></sub> = 4.83, GOF = 4.85. The double borate Na<sub>3</sub>Yb(BO<sub>3</sub>)<sub>2</sub> congruently melted at 1119 °C exhibited a complex thermal profile, as evidenced by DSC, with four polymorphic transitions observed at 277 °C, 497 °C, 653 °C, and 694 °C. Ab initio calculated IR spectrum of Na<sub>3</sub>Yb(BO<sub>3</sub>)<sub>2</sub>, exhibited a high degree of agreement with the experimentally obtained IR spectrum. The band gap of the title compound was calculated to be 4.7(2) eV using the combination of the Tauc method and DASF method. The calculated energy barrier for sodium ion migration, equal to 0.5 eV, was in a reasonable agreement with the experimentally determined activation energy of 0.75 eV. The title compound exhibited an ionic conductivity of 0.4 × 10<sup>−3</sup> S/cm at 1023 K.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"160 ","pages":"Article 107821"},"PeriodicalIF":3.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143149344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Impacts of reaction temperature on the photocatalytic effect of Co-doped ZnSe quantum dots (QDs) have been discussed thoroughly in this article. In this regard, CoxZn1-xSe (x = 0.00, 0.03, and 0.06 wt %) QDs were synthesized using a typical hydrothermal method to provide an easier, workable, affordable way to remove antibiotic pollutants from wastewater. Doping of magnetic impurities (Co2+ ions) in ZnSe QDs transformed the systems into diluted magnetic semiconductors and a signature of weak ferromagnetic behavior was registered at ambient temperature. Therefore, the genesis of weak ferromagnetism in doped systems has also been studied using DFT calculations to flourish their potential use for spintronic devices. Incorporation of cobalt ions introduced weak ferromagnetic signature at 300 K in doped ZnSe QDs, which is ascribed to the p-d hybridization as given by the DFT calculations. Photocatalytic degradation of ciprofloxacin (CIP) antibiotic agent was studied thoroughly by varying pH, temperature and the dosages of doped ZnSe nanocatalysts. It was found that 6 % cobalt-doped ZnSe QDs showed relatively better efficiency and rate constant in degrading CIP. With the increase in temperature (up to 70 °C), a significant increment in both the reaction rate and efficacy was observed for the highest Co-content ZnSe nanocatalysts. These results indicated that the photocatalytic efficiency of the catalyst was affected by the reaction temperature. It should be highlighted that cobalt-doped ZnSe QDs are qualified for efficient nanosized photocatalysts in addition to being competent dilute magnetic semiconductors.
{"title":"Temperature-dependent photocatalytic activity and emergence of weak ferromagnetism in cobalt-incorporated ZnSe quantum dots","authors":"Nur Jalal Mondal , Mritunjoy Prasad Ghosh , Rahul Sonkar , Samir Thakur , Eeshankur Saikia , Devasish Chowdhury","doi":"10.1016/j.solidstatesciences.2025.107827","DOIUrl":"10.1016/j.solidstatesciences.2025.107827","url":null,"abstract":"<div><div>Impacts of reaction temperature on the photocatalytic effect of Co-doped ZnSe quantum dots (QDs) have been discussed thoroughly in this article. In this regard, Co<sub>x</sub>Zn<sub>1-x</sub>Se (x = 0.00, 0.03, and 0.06 wt %) QDs were synthesized using a typical hydrothermal method to provide an easier, workable, affordable way to remove antibiotic pollutants from wastewater. Doping of magnetic impurities (Co<sup>2+</sup> ions) in ZnSe QDs transformed the systems into diluted magnetic semiconductors and a signature of weak ferromagnetic behavior was registered at ambient temperature. Therefore, the genesis of weak ferromagnetism in doped systems has also been studied using DFT calculations to flourish their potential use for spintronic devices. Incorporation of cobalt ions introduced weak ferromagnetic signature at 300 K in doped ZnSe QDs, which is ascribed to the p-d hybridization as given by the DFT calculations. Photocatalytic degradation of ciprofloxacin (CIP) antibiotic agent was studied thoroughly by varying pH, temperature and the dosages of doped ZnSe nanocatalysts. It was found that 6 % cobalt-doped ZnSe QDs showed relatively better efficiency and rate constant in degrading CIP. With the increase in temperature (up to 70 <strong>°</strong>C), a significant increment in both the reaction rate and efficacy was observed for the highest Co-content ZnSe nanocatalysts. These results indicated that the photocatalytic efficiency of the catalyst was affected by the reaction temperature. It should be highlighted that cobalt-doped ZnSe QDs are qualified for efficient nanosized photocatalysts in addition to being competent dilute magnetic semiconductors.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"160 ","pages":"Article 107827"},"PeriodicalIF":3.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143149346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-01DOI: 10.1016/j.solidstatesciences.2024.107815
Xian Xiao , Feiyan Zhou , Chenyu Yang , Lun Lu , Yuan Zhao , Baohua Tu , Liangzhong Li
Applying agricultural and industrial wastes into solid functional adsorbents for environmental remediation of heavy metal pollution remains a challenge. Herein, an efficient alkaline-pretreated H3PO4-modified cotton straw biochar (PCS) was developed to remove Cr(VI) by adsorption and reduction. Detailed characterization demonstrated that PCS has a substantial specific surface area (301.6 m2 g−1) and C-P-O groups (not in pristine biochar). Adsorption experiments were better described by pseudo-second-order and Langmuir model, which indicated that the adsorption followed the physicochemical diffusive monolayer adsorption mechanism. According to the alkaline extraction method and X-ray photoelectron spectroscope (XPS) analysis, the C-P-O groups on PCS participated in the adsorption of Cr(VI), converting 20.2 % of it to Cr(III). The remarkable adsorption capacity of PCS was 138.9 mg g−1, mainly attributed to pore filling, electrostatic attraction, complexation, and reduction. The PCS exhibited strong tolerance in common anionic and different water matrices and had the potential for practical application. The above findings can provide decision-making for the remediation of chromium-containing wastewater, as well as for the production of solid functional adsorbents in industry and agriculture.
{"title":"Adsorption and reduction of Cr(VI) by C-P-O groups in biochar: Performance and mechanisms","authors":"Xian Xiao , Feiyan Zhou , Chenyu Yang , Lun Lu , Yuan Zhao , Baohua Tu , Liangzhong Li","doi":"10.1016/j.solidstatesciences.2024.107815","DOIUrl":"10.1016/j.solidstatesciences.2024.107815","url":null,"abstract":"<div><div>Applying agricultural and industrial wastes into solid functional adsorbents for environmental remediation of heavy metal pollution remains a challenge. Herein, an efficient alkaline-pretreated H<sub>3</sub>PO<sub>4</sub>-modified cotton straw biochar (PCS) was developed to remove Cr(VI) by adsorption and reduction. Detailed characterization demonstrated that PCS has a substantial specific surface area (301.6 m<sup>2</sup> g<sup>−1</sup>) and C-P-O groups (not in pristine biochar). Adsorption experiments were better described by pseudo-second-order and Langmuir model, which indicated that the adsorption followed the physicochemical diffusive monolayer adsorption mechanism. According to the alkaline extraction method and X-ray photoelectron spectroscope (XPS) analysis, the C-P-O groups on PCS participated in the adsorption of Cr(VI), converting 20.2 % of it to Cr(III). The remarkable adsorption capacity of PCS was 138.9 mg g<sup>−1</sup>, mainly attributed to pore filling, electrostatic attraction, complexation, and reduction. The PCS exhibited strong tolerance in common anionic and different water matrices and had the potential for practical application. The above findings can provide decision-making for the remediation of chromium-containing wastewater, as well as for the production of solid functional adsorbents in industry and agriculture.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"160 ","pages":"Article 107815"},"PeriodicalIF":3.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-01DOI: 10.1016/j.solidstatesciences.2024.107810
Satoshi Sugiyanagi, Yasuaki Matsuda
Li29-3xAlxZr9Nb3O40, an ordered rock-salt oxide, was synthesized by a two-step solid-state method, and sintered bodies with relative densities of approximately 90 % were obtained. The sample with x = 0 exhibited a conductivity of 1.5 × 10−4 Scm−1 at 500 °C, with an activation energy of 0.99 eV, and lithium conductivity showed no improvement by Al3+ substitution. After exposing Li29Zr9Nb3O40 to a humidified atmosphere, its surface became strongly alkaline and the lattice constant changed, indicating the formation of lithium hydroxide on the surface by the exchange reaction between Li+ and H+ in water vapor. The sample exposed to a humidified atmosphere for 1 week exhibited a high conductivity of 4.6 × 10−3 Scm−1 at 25 °C, which decreased to 1.75 × 10−6 Scm−1 at 150 °C. Our results indicate the occurrence of fast ion diffusion at the surface of the ordered rock-salt phase.
{"title":"Effect of proton-exchange reactions on the ionic conductivity of Li29-3xAlxZr9Nb3O40, an ordered rock-salt oxide","authors":"Satoshi Sugiyanagi, Yasuaki Matsuda","doi":"10.1016/j.solidstatesciences.2024.107810","DOIUrl":"10.1016/j.solidstatesciences.2024.107810","url":null,"abstract":"<div><div>Li<sub>29-3<em>x</em></sub>Al<sub><em>x</em></sub>Zr<sub>9</sub>Nb<sub>3</sub>O<sub>40</sub>, an ordered rock-salt oxide, was synthesized by a two-step solid-state method, and sintered bodies with relative densities of approximately 90 % were obtained. The sample with <em>x</em> = 0 exhibited a conductivity of 1.5 × 10<sup>−4</sup> Scm<sup>−1</sup> at 500 °C, with an activation energy of 0.99 eV, and lithium conductivity showed no improvement by Al<sup>3+</sup> substitution. After exposing Li<sub>29</sub>Zr<sub>9</sub>Nb<sub>3</sub>O<sub>40</sub> to a humidified atmosphere, its surface became strongly alkaline and the lattice constant changed, indicating the formation of lithium hydroxide on the surface by the exchange reaction between Li<sup>+</sup> and H<sup>+</sup> in water vapor. The sample exposed to a humidified atmosphere for 1 week exhibited a high conductivity of 4.6 × 10<sup>−3</sup> Scm<sup>−1</sup> at 25 °C, which decreased to 1.75 × 10<sup>−6</sup> Scm<sup>−1</sup> at 150 °C. Our results indicate the occurrence of fast ion diffusion at the surface of the ordered rock-salt phase.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"160 ","pages":"Article 107810"},"PeriodicalIF":3.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143098236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-01DOI: 10.1016/j.solidstatesciences.2024.107819
Numan Yanar , Arni G. Pornea , Duy Khoe Dinh , Changho Kim , Eunkwang Park , Jae-Hak Choi , Jaewoo Kim
In this article, the enhancement of thermal and mechanical properties, and the moisture resistance of nylon-6 nanofiber fabrics for the space application such as the astronaut suits by compounding boron nitride nanotubes (BNNT) is investigated. For the proposed application, BNNT are first surface modified through the wrapping of nanotubes with Sodium Dodecyl Sulfate (SDS) for enabling the dispersion of BNNT in nylon-6 matrix, then the nylon-6 nanofiber fabrics compounded with SDS modified 2.5 wt% (BNNT2.5), 5.0 wt% (BNNT5.0), 7.5 wt% (BNNT7.5), 10.0 wt% (BNNT10.0) of BNNT are fabricated through electrospinning. Among these samples, BNNT5.0 shows the ultimate performance with its mechanical performance by having the tensile strength of 12.41 MPa and 35 % elongation performance which is 340 % higher tensile strength than neat nylon-6 sample and 152 % higher tensile strength than neat nylon-6 sample having SDS additive (Neat). BNNT5.0 also shows higher water contact angle (86.56°) than Neat (71.38°) proving the enhanced moisture resistance. In terms of thermal performance, BNNT5.0 shows 32 % enhanced thermal conductivity (0.434 W/mK) compared to Neat (0.296 W/mK), and a superior thermal stability showing shrinking resistance at elevated temperatures as high as 200 °C while Neat melts down at same temperature. Finally, BNNT5.0 also shows rapid cooling performance which two times higher than Neat according to the infrared imaging for cooling from 60 °C to room temperature. Consequently, we expect BNNT may provide lighter and robust feasibility for the conventional nylon-6 nanofibers to be used for the astronaut suits.
{"title":"Boron nitride nanotubes embedded nylon-6 nanofibers composites for space applications","authors":"Numan Yanar , Arni G. Pornea , Duy Khoe Dinh , Changho Kim , Eunkwang Park , Jae-Hak Choi , Jaewoo Kim","doi":"10.1016/j.solidstatesciences.2024.107819","DOIUrl":"10.1016/j.solidstatesciences.2024.107819","url":null,"abstract":"<div><div>In this article, the enhancement of thermal and mechanical properties, and the moisture resistance of nylon-6 nanofiber fabrics for the space application such as the astronaut suits by compounding boron nitride nanotubes (BNNT) is investigated. For the proposed application, BNNT are first surface modified through the wrapping of nanotubes with Sodium Dodecyl Sulfate (SDS) for enabling the dispersion of BNNT in nylon-6 matrix, then the nylon-6 nanofiber fabrics compounded with SDS modified 2.5 wt% (BNNT2.5), 5.0 wt% (BNNT5.0), 7.5 wt% (BNNT7.5), 10.0 wt% (BNNT10.0) of BNNT are fabricated through electrospinning. Among these samples, BNNT5.0 shows the ultimate performance with its mechanical performance by having the tensile strength of 12.41 MPa and 35 % elongation performance which is 340 % higher tensile strength than neat nylon-6 sample and 152 % higher tensile strength than neat nylon-6 sample having SDS additive (Neat). BNNT5.0 also shows higher water contact angle (86.56°) than Neat (71.38°) proving the enhanced moisture resistance. In terms of thermal performance, BNNT5.0 shows 32 % enhanced thermal conductivity (0.434 W/mK) compared to Neat (0.296 W/mK), and a superior thermal stability showing shrinking resistance at elevated temperatures as high as 200 °C while Neat melts down at same temperature. Finally, BNNT5.0 also shows rapid cooling performance which two times higher than Neat according to the infrared imaging for cooling from 60 °C to room temperature. Consequently, we expect BNNT may provide lighter and robust feasibility for the conventional nylon-6 nanofibers to be used for the astronaut suits.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"160 ","pages":"Article 107819"},"PeriodicalIF":3.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143098788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-31DOI: 10.1016/j.solidstatesciences.2025.107852
Yaqi Jiang , Jiaqi Feng , Guoqing Liu , Zixuan Chen , Qin Xu , Peipei Lu , Junmeng Zhang , Guangyu Wen , Lihu Liu , Huiyuan Sun
Changes in the morphology of FeNi alloy nanowires during annealing at different temperatures were studied by transmission electron microscopy. In this work, kinds of morphologies including composite oxide wire/tube, wire@tube (or core-shell) and pure tubular microstructures were obtained successfully. The structure can be tuned by changing the annealing temperature. The formation mechanism was discussed in detail based on ion diffusion and Kirkendal effect. The as-prepared and annealed samples were characterized by the X-ray diffraction (XRD), transmission electron microscopy (TEM) and EDS mapping, respectively. The material composition of the nanostructures with different morphologies was further determined, and the cation diffusion mechanism was deduced. The result of magnetic measurement showed the coercivity and squareness of the nanostructures perpendicular to the AAO film surface decrease with the increase of annealing temperature, and the hysteresis loop of the sample annealed at high temperature is in a wasp-waist shape, which is consistent with the result that the sample contains multiple magnetic phases. Obviously, the present ferrite heterogeneous composite microstructures have potential application as a multifunctional magnetic material.
{"title":"Formation mechanism and magnetic properties of ferrite composite tubular microstructures","authors":"Yaqi Jiang , Jiaqi Feng , Guoqing Liu , Zixuan Chen , Qin Xu , Peipei Lu , Junmeng Zhang , Guangyu Wen , Lihu Liu , Huiyuan Sun","doi":"10.1016/j.solidstatesciences.2025.107852","DOIUrl":"10.1016/j.solidstatesciences.2025.107852","url":null,"abstract":"<div><div>Changes in the morphology of FeNi alloy nanowires during annealing at different temperatures were studied by transmission electron microscopy. In this work, kinds of morphologies including composite oxide wire/tube, wire@tube (or core-shell) and pure tubular microstructures were obtained successfully. The structure can be tuned by changing the annealing temperature. The formation mechanism was discussed in detail based on ion diffusion and Kirkendal effect. The as-prepared and annealed samples were characterized by the X-ray diffraction (XRD), transmission electron microscopy (TEM) and EDS mapping, respectively. The material composition of the nanostructures with different morphologies was further determined, and the cation diffusion mechanism was deduced. The result of magnetic measurement showed the coercivity and squareness of the nanostructures perpendicular to the AAO film surface decrease with the increase of annealing temperature, and the hysteresis loop of the sample annealed at high temperature is in a wasp-waist shape, which is consistent with the result that the sample contains multiple magnetic phases. Obviously, the present ferrite heterogeneous composite microstructures have potential application as a multifunctional magnetic material.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"161 ","pages":"Article 107852"},"PeriodicalIF":3.4,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143350313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We present a series of procedures that prepared and analyzed chromium borides (Cr-B) microcrystals using a combination of micro-focused ion and quantum beam techniques. The chemical state analyses were carried out using micro-photoemission spectroscopy and structural analyses were performed using micro-reflection high-energy electron diffraction and single-crystal X-ray diffraction. This approach successfully identified the existence of CrB and CrB phases in a Cr-B microcrystal and also provided detailed chemical state evaluation of CrB phase. Our integration of these techniques enabled to distinguish and evaluate micro-scale phases within complex materials, identifying different phases or unexpected secondary products of microcrystal.
{"title":"Evaluating chemical states in a single microcrystal of chromium boride with the micro-focused ion and quantum beams","authors":"Yanze Guan , Xiaoni Zhang , Masashige Miyamoto , Yuki Tsujikawa , Kunio Yubuta , Masafumi Horio , Hironari Isshiki , Jun-ichi Yamaura , Tadashi Abukawa , Fumio Komori , Iwao Matsuda","doi":"10.1016/j.solidstatesciences.2025.107838","DOIUrl":"10.1016/j.solidstatesciences.2025.107838","url":null,"abstract":"<div><div>We present a series of procedures that prepared and analyzed chromium borides (Cr-B) microcrystals using a combination of micro-focused ion and quantum beam techniques. The chemical state analyses were carried out using micro-photoemission spectroscopy and structural analyses were performed using micro-reflection high-energy electron diffraction and single-crystal X-ray diffraction. This approach successfully identified the existence of CrB<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> and Cr<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>B<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span> phases in a Cr-B microcrystal and also provided detailed chemical state evaluation of Cr<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>B<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span> phase. Our integration of these techniques enabled to distinguish and evaluate micro-scale phases within complex materials, identifying different phases or unexpected secondary products of microcrystal.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"161 ","pages":"Article 107838"},"PeriodicalIF":3.4,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143210962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-25DOI: 10.1016/j.solidstatesciences.2025.107839
V. Bilovol , M. Sikora , A. Quesada , K. Berent , M. Gajewska
The magnetic interactions in SrFe12O19/NiFe2O4 composites have been studied using the component fractions (90/10, 85/15, 80/20, 75/25 wt%) and the size of magnetically soft nickel ferrite particles as variables. It was observed that the greater the amount of nickel ferrite (NFO) in the composites, the stronger the intensity of the dipolar interactions. Reducing the NFO particle size (from 190 nm to about 25 nm) resulted in an improvement in the Ms and Mr values of the composite, despite the fact that the Ms of NFO is smaller than the Ms of the hexaferrite ancestor (SrM). This fact is attributed to the diffusion of Ni atoms into the SrM lattice as a result of the heat treatment following the mechanosynthesis of the two ferrites, the method of their fine mixing. An increase in the net magnetization of the composite can be explained by the substitution of Fe3+ ions by Ni2+ ions in the 4f1 and/or 4f2 positions of the SrM lattice. Such an exclusive exchange takes place in the complex system only when small nickel ferrite particles are present in the composite. That is, their reactivity is increased compared to larger ones.
{"title":"Particle interactions in SrFe12O19/NiFe2O4 magnetic composites: Effect of composition ratios and nickel ferrite size","authors":"V. Bilovol , M. Sikora , A. Quesada , K. Berent , M. Gajewska","doi":"10.1016/j.solidstatesciences.2025.107839","DOIUrl":"10.1016/j.solidstatesciences.2025.107839","url":null,"abstract":"<div><div>The magnetic interactions in SrFe<sub>12</sub>O<sub>19</sub>/NiFe<sub>2</sub>O<sub>4</sub> composites have been studied using the component fractions (90/10, 85/15, 80/20, 75/25 wt%) and the size of magnetically soft nickel ferrite particles as variables. It was observed that the greater the amount of nickel ferrite (NFO) in the composites, the stronger the intensity of the dipolar interactions. Reducing the NFO particle size (from 190 nm to about 25 nm) resulted in an improvement in the M<sub>s</sub> and M<sub>r</sub> values of the composite, despite the fact that the M<sub>s</sub> of NFO is smaller than the M<sub>s</sub> of the hexaferrite ancestor (SrM). This fact is attributed to the diffusion of Ni atoms into the SrM lattice as a result of the heat treatment following the mechanosynthesis of the two ferrites, the method of their fine mixing. An increase in the net magnetization of the composite can be explained by the substitution of Fe<sup>3+</sup> ions by Ni<sup>2+</sup> ions in the 4f<sub>1</sub> and/or 4f<sub>2</sub> positions of the SrM lattice. Such an exclusive exchange takes place in the complex system only when small nickel ferrite particles are present in the composite. That is, their reactivity is increased compared to larger ones.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"161 ","pages":"Article 107839"},"PeriodicalIF":3.4,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143161578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-22DOI: 10.1016/j.solidstatesciences.2025.107830
E. Korshikov, A. Aldiyarov, A. Nurmukan, O. Vorobyova, D. Sokolov
In recent years, many researchers have focused on studying interstellar dust and astrophysical ices. These objects are particularly significant because they are key components of the interstellar medium and play a decisive role in the formation of stars and planets. Studies of the properties of vacuum deposited films have expanded our understanding of the processes involved in the formation of clathrates and hydrates in CO and water mixtures, their physical characteristics, and how specific features emerge based on the method of formation. Capturing and storing CO molecules is considered one of the most promising strategies for combating the potential environmental disaster of global warming. The aim of this study was to investigate the IR spectra of thin films composed of a mixture of CO and water created via vapor deposition within the temperature range 11–180 K. Through spectral analysis, the formation of hydrates and clathrates, which are phenomena of interest in modern condensed matter physics, was examined. The research utilized IR spectroscopy methods to study the resulting thin films. During the experiments, CO and gas hydrate structures were formed within the mixture. In these cases, the sublimation temperature of the CO molecules integrated into the hydrate structures was found to be significantly higher than the equilibrium values, whereas the unbound CO molecules sublimated earlier. The results obtained provide further insights into the formation processes of clathrates and hydrates in CO and water mixtures, their physical properties, and the emergence of characteristics depending on the method of formation.
{"title":"Investigation of vacuum cryodeposited water films capturing carbon monoxide on an optical surface","authors":"E. Korshikov, A. Aldiyarov, A. Nurmukan, O. Vorobyova, D. Sokolov","doi":"10.1016/j.solidstatesciences.2025.107830","DOIUrl":"10.1016/j.solidstatesciences.2025.107830","url":null,"abstract":"<div><div>In recent years, many researchers have focused on studying interstellar dust and astrophysical ices. These objects are particularly significant because they are key components of the interstellar medium and play a decisive role in the formation of stars and planets. Studies of the properties of vacuum deposited films have expanded our understanding of the processes involved in the formation of clathrates and hydrates in CO and water mixtures, their physical characteristics, and how specific features emerge based on the method of formation. Capturing and storing CO molecules is considered one of the most promising strategies for combating the potential environmental disaster of global warming. The aim of this study was to investigate the IR spectra of thin films composed of a mixture of CO and water created via vapor deposition within the temperature range 11–180 K. Through spectral analysis, the formation of hydrates and clathrates, which are phenomena of interest in modern condensed matter physics, was examined. The research utilized IR spectroscopy methods to study the resulting thin films. During the experiments, CO and gas hydrate structures were formed within the mixture. In these cases, the sublimation temperature of the CO molecules integrated into the hydrate structures was found to be significantly higher than the equilibrium values, whereas the unbound CO molecules sublimated earlier. The results obtained provide further insights into the formation processes of clathrates and hydrates in CO and water mixtures, their physical properties, and the emergence of characteristics depending on the method of formation.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"161 ","pages":"Article 107830"},"PeriodicalIF":3.4,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143161577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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