Pub Date : 2024-09-12DOI: 10.1149/2162-8777/ad775a
Peter N. G. Ibrahim, Ahmed E. Hannora and Farid F. Hanna
Single phase La0.6Sr0.4MnO3 nanoparticles with perovskite structure ( symmetry) were successfully prepared by ball milling (mechanochemical synthesis) for 1 and 10 h followed by annealing treatment at temperature 900 or 1100 °C. It was found that, the lattice parameters increase with the increase of milling time or annealing temperature. The increase of the annealing temperature results in the increase of crystallite size and the particle size. The obtained samples were found to be ferromagnetic at room temperature. The sample obtained by one hour of milling and 900 °C annealing showed high value of saturation magnetization (about 56 emu g−1) and small value of coercivity (about 31 Oe) at room temperature, while the other samples show reduced value of magnetization and higher value of coercivity. The obtained magnetic results are discussed in light of the core/shell model of nanoparticles. The effect of the presence of oxygen vacancies on the lattice parameters and magnetic properties of the obtained samples is also discussed. Highlights Single phase perovskite La0.6Sr0.4MnO3 was obtained by mechanochemical synthesis. The influence of milling time and annealing temperature on the structural and magnetic properties was studied. The lattice parameters increase with the increase of milling time or annealing temperature The crystallite size and the particle size increase with the increase of annealing temperature. All samples showed ferromagnetic behavior at room temperature. Most of the samples show reduced value of magnetization. The magnetic results were discussed by the core/shell model of nanoparticles. The formation of oxygen vacancies can affect the magnetic results.
{"title":"Structural and Magnetic Properties of Nano Manganite La0.6Sr0.4MnO3 Obtained by Mechanochemical Synthesis Influenced by Preparation Conditions","authors":"Peter N. G. Ibrahim, Ahmed E. Hannora and Farid F. Hanna","doi":"10.1149/2162-8777/ad775a","DOIUrl":"https://doi.org/10.1149/2162-8777/ad775a","url":null,"abstract":"Single phase La0.6Sr0.4MnO3 nanoparticles with perovskite structure ( symmetry) were successfully prepared by ball milling (mechanochemical synthesis) for 1 and 10 h followed by annealing treatment at temperature 900 or 1100 °C. It was found that, the lattice parameters increase with the increase of milling time or annealing temperature. The increase of the annealing temperature results in the increase of crystallite size and the particle size. The obtained samples were found to be ferromagnetic at room temperature. The sample obtained by one hour of milling and 900 °C annealing showed high value of saturation magnetization (about 56 emu g−1) and small value of coercivity (about 31 Oe) at room temperature, while the other samples show reduced value of magnetization and higher value of coercivity. The obtained magnetic results are discussed in light of the core/shell model of nanoparticles. The effect of the presence of oxygen vacancies on the lattice parameters and magnetic properties of the obtained samples is also discussed. Highlights Single phase perovskite La0.6Sr0.4MnO3 was obtained by mechanochemical synthesis. The influence of milling time and annealing temperature on the structural and magnetic properties was studied. The lattice parameters increase with the increase of milling time or annealing temperature The crystallite size and the particle size increase with the increase of annealing temperature. All samples showed ferromagnetic behavior at room temperature. Most of the samples show reduced value of magnetization. The magnetic results were discussed by the core/shell model of nanoparticles. The formation of oxygen vacancies can affect the magnetic results.","PeriodicalId":11496,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142189776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-09DOI: 10.1149/2162-8777/ad71ef
Chunlong Sun, Wen Du, Wang Li, Bin Dong, Baogui Wang, Yanjun Lin, Wenwen Huang, Fangliang Xia and Jun Pan
Xanthene dyes are a type of fluorescent dye with a π conjugated system and a unique ring-opening mechanism. Fluorescent probes with xanthene dyes as fluorescent groups have the advantages of high molar extinction coefficient, high fluorescence quantum yield, good stability, and good water solubility, making them suitable for medical imaging and biological imaging diagnosis. Therefore, this article reviews the research progress of xanthene fluorescent probes in recent years in terms of pH value, reactive oxygen species, metal ions, anions, enzymes, thiol derivatives, etc, summarizes their design ideas, detection performance, and applications, and points out the development trend of xanthene fluorescent probes, providing a reference for the subsequent development and utilization of xanthene fluorescent probes.
{"title":"Review—Research Progress of Novel Fluorescent Probes with the Structure of Xanthene as Parent Nucleus","authors":"Chunlong Sun, Wen Du, Wang Li, Bin Dong, Baogui Wang, Yanjun Lin, Wenwen Huang, Fangliang Xia and Jun Pan","doi":"10.1149/2162-8777/ad71ef","DOIUrl":"https://doi.org/10.1149/2162-8777/ad71ef","url":null,"abstract":"Xanthene dyes are a type of fluorescent dye with a π conjugated system and a unique ring-opening mechanism. Fluorescent probes with xanthene dyes as fluorescent groups have the advantages of high molar extinction coefficient, high fluorescence quantum yield, good stability, and good water solubility, making them suitable for medical imaging and biological imaging diagnosis. Therefore, this article reviews the research progress of xanthene fluorescent probes in recent years in terms of pH value, reactive oxygen species, metal ions, anions, enzymes, thiol derivatives, etc, summarizes their design ideas, detection performance, and applications, and points out the development trend of xanthene fluorescent probes, providing a reference for the subsequent development and utilization of xanthene fluorescent probes.","PeriodicalId":11496,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142189781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-05DOI: 10.1149/2162-8777/ad7403
Victor-Tapio Rangel-Kuoppa, Dante Rodrigo Alfaro-Flores, Angel Guillen-Cervantes, Francisco de Moure-Flores, Miguel Ángel Meléndez-Lira
Si nanoparticles embedded in a ZnO matrix were produced by a sequential deposition of ZnO/Si/ZnO layers, by radio frequency sputtering. Sample growth temperatures of 25 °C, 300 °C, and 500 °C were used to deposit ZnO/Si/ZnO layers on soda lime glass and p-type silicon substrates; ZnO layers were deposited by reactive radio-frequency sputtering employing a mixture of Ar/O2, with a ratio of 66/33, as working atmosphere. The type of substrate and the growth temperature affect the first ZnO layer roughness, promoting the formation of silicon nanoparticles, matrix characteristics, and as consequence, spectral response. The roughness of the initial ZnO layer is transferred to the top layer of ZnO, and it can be tailored between 65 and 370 Å, depending on the sample growth temperature. Transmission electron microscopy show that substrate temperature mainly affects the density of silicon nanoparticles rather than their size. ZnO/Si/ZnO films deposited on p-type silicon substrate were processed and photosensors were obtained, showing a selective response in the 950 to 1150 nm wavelength range, making them suitable candidates for near infrared detectors.
通过射频溅射连续沉积氧化锌/二氧化硅/氧化锌层，产生了嵌入氧化锌基体的硅纳米粒子。样品生长温度分别为 25 ℃、300 ℃ 和 500 ℃，用于在钠钙玻璃和 p 型硅衬底上沉积 ZnO/Si/ZnO 层；采用反应射频溅射法沉积 ZnO 层，工作气氛为氩气/氧气混合物（比例为 66/33）。衬底类型和生长温度会影响第一层氧化锌层的粗糙度，促进硅纳米颗粒的形成，影响基质特性，进而影响光谱响应。初始氧化锌层的粗糙度会转移到氧化锌顶层，根据样品生长温度的不同，粗糙度可在 65 至 370 Å 之间定制。透射电子显微镜显示，衬底温度主要影响硅纳米颗粒的密度，而不是它们的尺寸。对沉积在 p 型硅衬底上的 ZnO/Si/ZnO 薄膜进行了处理，并获得了光传感器，在 950 至 1150 纳米波长范围内显示出选择性响应，使其成为近红外探测器的合适候选材料。
{"title":"Towards ZnO-Based Near-Infra-Red Radiation Detectors: Performance Improvement via Si Nanoclusters Embedment","authors":"Victor-Tapio Rangel-Kuoppa, Dante Rodrigo Alfaro-Flores, Angel Guillen-Cervantes, Francisco de Moure-Flores, Miguel Ángel Meléndez-Lira","doi":"10.1149/2162-8777/ad7403","DOIUrl":"https://doi.org/10.1149/2162-8777/ad7403","url":null,"abstract":"Si nanoparticles embedded in a ZnO matrix were produced by a sequential deposition of ZnO/Si/ZnO layers, by radio frequency sputtering. Sample growth temperatures of 25 °C, 300 °C, and 500 °C were used to deposit ZnO/Si/ZnO layers on soda lime glass and p-type silicon substrates; ZnO layers were deposited by reactive radio-frequency sputtering employing a mixture of Ar/O<sub>2,</sub> with a ratio of 66/33, as working atmosphere. The type of substrate and the growth temperature affect the first ZnO layer roughness, promoting the formation of silicon nanoparticles, matrix characteristics, and as consequence, spectral response. The roughness of the initial ZnO layer is transferred to the top layer of ZnO, and it can be tailored between 65 and 370 Å, depending on the sample growth temperature. Transmission electron microscopy show that substrate temperature mainly affects the density of silicon nanoparticles rather than their size. ZnO/Si/ZnO films deposited on p-type silicon substrate were processed and photosensors were obtained, showing a selective response in the 950 to 1150 nm wavelength range, making them suitable candidates for near infrared detectors.","PeriodicalId":11496,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142189777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The internal electric field distribution is one key design consideration, which affects the charge collection efficiency in silicon drift detectors (SDDs). The internal electrostatic potential distributions along SDD front and back surfaces, which are determined by the applied voltages at cathode electrodes, define the final internal field distribution. Front-back bias coupling leads to the complexity of electrode structure design and voltage tuning. Device simulation is performed to investigate the performance of SDDs with varied bias voltages. When the cathode bias is −40 V with the first ring bias of −15 V and the outermost ring bias of −80 V, the detector is biased with a uniform electric field distribution, favorable electron drift trajectories. The simulation results provide new insight into the influence of internal electric field and electron drift trajectories on the charge collection efficiency. According to the analysis of simulation results, a 2000 × 2000 μm area concentric silicon drift detector was designed and fabricated. The electrical characteristics of the designed detectors were studied to show the validity of the proposed device design methodology. The internal electric field distribution and electron drift trajectories can be tuned to improve the charge collection efficiency.
{"title":"Insight into the Impact of Electron Drift Trajectory on Charge Collection in Silicon Drift Detector","authors":"Rongrong Guo, Yujia Peng, Huixiang Huang, Chih-Ching Chen, Tsung-Yi Chen","doi":"10.1149/2162-8777/ad7401","DOIUrl":"https://doi.org/10.1149/2162-8777/ad7401","url":null,"abstract":"The internal electric field distribution is one key design consideration, which affects the charge collection efficiency in silicon drift detectors (SDDs). The internal electrostatic potential distributions along SDD front and back surfaces, which are determined by the applied voltages at cathode electrodes, define the final internal field distribution. Front-back bias coupling leads to the complexity of electrode structure design and voltage tuning. Device simulation is performed to investigate the performance of SDDs with varied bias voltages. When the cathode bias is −40 V with the first ring bias of −15 V and the outermost ring bias of −80 V, the detector is biased with a uniform electric field distribution, favorable electron drift trajectories. The simulation results provide new insight into the influence of internal electric field and electron drift trajectories on the charge collection efficiency. According to the analysis of simulation results, a 2000 × 2000 μm area concentric silicon drift detector was designed and fabricated. The electrical characteristics of the designed detectors were studied to show the validity of the proposed device design methodology. The internal electric field distribution and electron drift trajectories can be tuned to improve the charge collection efficiency.","PeriodicalId":11496,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142189780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-04DOI: 10.1149/2162-8777/ad7402
Min Chen, Shuxin Chen, Yaxuan Ji, Kai Zhang
Negative permittivity in percolation composites garnered significant interest due to its promising implications for practical applications. This study demonstrates that the percolation threshold of the polyaniline(PANI)/epoxy resin composite falls within the range of 40 wt% to 50 wt%. Beyond this percolation threshold, the composites exhibit a corresponding negative dielectric behavior. Notably, at a high PANI content level of 90 wt%, the permittivity exhibits characteristics akin to Lorentz resonance type behavior. This research presents an effective approach to exhibit tunable low-frequency negative permittivity through Lorentz resonance.
{"title":"Communication—Tunable Lorentz-Type Negative Permittivity of PANI/Epoxy Resin Composites in the Frequency Range from 3 kHz to 1 MHz","authors":"Min Chen, Shuxin Chen, Yaxuan Ji, Kai Zhang","doi":"10.1149/2162-8777/ad7402","DOIUrl":"https://doi.org/10.1149/2162-8777/ad7402","url":null,"abstract":"Negative permittivity in percolation composites garnered significant interest due to its promising implications for practical applications. This study demonstrates that the percolation threshold of the polyaniline(PANI)/epoxy resin composite falls within the range of 40 wt% to 50 wt%. Beyond this percolation threshold, the composites exhibit a corresponding negative dielectric behavior. Notably, at a high PANI content level of 90 wt%, the permittivity exhibits characteristics akin to Lorentz resonance type behavior. This research presents an effective approach to exhibit tunable low-frequency negative permittivity through Lorentz resonance.","PeriodicalId":11496,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142189782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-30DOI: 10.1149/2162-8777/ad71f0
Padmanaban B, Hariharasuthan R, Saravanan P, SenthilKannan K
Oxalic acid dihydrate (OADH) crystal was grown by slow evaporation solution method, milled to micro-OADH, impacted with shocked 50 pulses and harvested in a 16-day period. The 2 MPa pressure with 2.2 Mach number of 864 K temperature specifies the product as shocked 50 scaled OADH. Single crystalline X-ray diffraction of OADH macro are as specified with P21/n as space group with monoclinic as the crystal system and shocked 50 scaled OADH are with lattice constants; the % of elements of OADH specimen are confirmed by theory and practice. The dielectric constant of OADH is higher at lower frequency values by space charge polarization. OADH of all scales are of the negative photo-conductivity type. The influx data of OADH of three types of scaling are identified as better electronic filter. The micro-OADH is confirmed by the scanning electron microscopy analysis as 10 micrometer scaling without any flaws. The Fluorescence (FL) study shows bluish FL emission for all samples of OADH; sensitivity is 8.88>6.6>2.2 for shocked 50-OADH, micro-OADH, macro-OADH. The Miller’s indices of (101) profile for RGB display is shown without as well with recursive colors of OADH.
{"title":"Growth, Characterizations of Oxalic Acid Di-Hydrate Crystals of Pure, Milled, Shocked Impact of 50 Scaling for Electronic, Photonic, Display and Sensor Usefulness by Theory and Practice","authors":"Padmanaban B, Hariharasuthan R, Saravanan P, SenthilKannan K","doi":"10.1149/2162-8777/ad71f0","DOIUrl":"https://doi.org/10.1149/2162-8777/ad71f0","url":null,"abstract":"Oxalic acid dihydrate (OADH) crystal was grown by slow evaporation solution method, milled to micro-OADH, impacted with shocked 50 pulses and harvested in a 16-day period. The 2 MPa pressure with 2.2 Mach number of 864 K temperature specifies the product as shocked 50 scaled OADH. Single crystalline X-ray diffraction of OADH macro are as specified with P2<sub>1</sub>/n as space group with monoclinic as the crystal system and shocked 50 scaled OADH are with lattice constants; the % of elements of OADH specimen are confirmed by theory and practice. The dielectric constant of OADH is higher at lower frequency values by space charge polarization. OADH of all scales are of the negative photo-conductivity type. The influx data of OADH of three types of scaling are identified as better electronic filter. The micro-OADH is confirmed by the scanning electron microscopy analysis as 10 micrometer scaling without any flaws. The Fluorescence (FL) study shows bluish FL emission for all samples of OADH; sensitivity is 8.88>6.6>2.2 for shocked 50-OADH, micro-OADH, macro-OADH. The Miller’s indices of (101) profile for RGB display is shown without as well with recursive colors of OADH.","PeriodicalId":11496,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142189783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-30DOI: 10.1149/2162-8777/ad71f1
Zein K. Heiba, Mohamed Bakr Mohamed, Ali Badawi
We investigated the effects of Ni-doping amount on the structural, magnetic, and shielding properties of nano Er2O3. Nano Er2−xNixO3 (x = 0, 0.05, 0.1, 0.15) samples were fabricated by a pechini scheme and characterized via X-ray diffraction. Rietveld refinement was used to discover the distribution of cations on the two crystallographic sites. Cation ordering in the two nonequivalent sites of the structure and the variation of the oxygen bond lengths of octahedra with the composition x were also investigated. A consistent reduction in the average bond lengths of (Er/Ni)O6 octahedra around 8b and 24d as x progresses was observed. Average crystallite size reduced while average lattice micro-strain increased with increasing Ni doping. The correlation between magnetization and temperature for all samples under a magnetic field of 200 Oe was studied. Curie-Weiss law was applied to find the magnetic moments and the types of magnetic structure. The μeff in the Er2−xNixO3 samples dropped from 9.7 to 9.36 μB as the nickel doping level rose from 0 to 0.15. Calculated magnetic moments, μcal, were found to drop from 9.4 to 9.02 μB as the nickel doping level changed from x = 0 to x = 0.15 in Er2−xNixO3 samples. Curie paramagnetic temperature (θ) for all samples has been observed to rise from −10.6 to −19.34. The theoretical gamma-ray attenuation parameters for nano Er2−xNixO3 samples were acquired through the Phy-X/PSD software. The nano Er2−xNixO3 samples have been proven to possess remarkable magnetic and neutron shielding applications.
{"title":"Tailoring the Magnetic, Structural and Shielding Characteristics of Nano Er2O3 via Ni Doping","authors":"Zein K. Heiba, Mohamed Bakr Mohamed, Ali Badawi","doi":"10.1149/2162-8777/ad71f1","DOIUrl":"https://doi.org/10.1149/2162-8777/ad71f1","url":null,"abstract":"We investigated the effects of Ni-doping amount on the structural, magnetic, and shielding properties of nano Er<sub>2</sub>O<sub>3</sub>. Nano Er<sub>2−x</sub>Ni<sub>x</sub>O<sub>3</sub> (x = 0, 0.05, 0.1, 0.15) samples were fabricated by a pechini scheme and characterized via X-ray diffraction. Rietveld refinement was used to discover the distribution of cations on the two crystallographic sites. Cation ordering in the two nonequivalent sites of the structure and the variation of the oxygen bond lengths of octahedra with the composition x were also investigated. A consistent reduction in the average bond lengths of (Er/Ni)O<sub>6</sub> octahedra around 8b and 24d as x progresses was observed. Average crystallite size reduced while average lattice micro-strain increased with increasing Ni doping. The correlation between magnetization and temperature for all samples under a magnetic field of 200 Oe was studied. Curie-Weiss law was applied to find the magnetic moments and the types of magnetic structure. The <italic toggle=\"yes\">μ</italic>\u0000<sub>eff</sub> in the Er<sub>2−x</sub>Ni<sub>x</sub>O<sub>3</sub> samples dropped from 9.7 to 9.36 μ<sub>B</sub> as the nickel doping level rose from 0 to 0.15. Calculated magnetic moments, <italic toggle=\"yes\">μ</italic>\u0000<sub>cal</sub>, were found to drop from 9.4 to 9.02 μ<sub>B</sub> as the nickel doping level changed from x = 0 to x = 0.15 in Er<sub>2−x</sub>Ni<sub>x</sub>O<sub>3</sub> samples. Curie paramagnetic temperature (<italic toggle=\"yes\">θ</italic>) for all samples has been observed to rise from −10.6 to −19.34. The theoretical gamma-ray attenuation parameters for nano Er<sub>2−x</sub>Ni<sub>x</sub>O<sub>3</sub> samples were acquired through the Phy-X/PSD software. The nano Er<sub>2−x</sub>Ni<sub>x</sub>O<sub>3</sub> samples have been proven to possess remarkable magnetic and neutron shielding applications.","PeriodicalId":11496,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142189787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-30DOI: 10.1149/2162-8777/ad71f3
Yu-Hung Chen, Ching-Chuan Chou, Hong-Shi Liu, Chien-Tso Lin, Yu-Pin Lin
This study presents the fabrication of perovskite thin-film solar cells (PTSCs) with adjustable colors, achieved through a multilayer film design. The multilayer film, comprising Au and indium-tin-oxide (ITO), functions as an adjusted color reflectance (ACR) multilayer film. When the ITO thickness is varied from 100 to 150 nm, the color of the PTSCs can be adjusted from lighter shades that resemble fresh milk tea to darker tones akin to caramel. The color changes that the ACR multilayer film induces correlate well with its reflectance response. Compared with traditional black-colored PTSCs, the milk tea–colored PTSCs maintain a power conversion efficiency of >12%. This achievement suggests the potential for fabricating PTSCs in various colors and patterns that are suitable for use in furnishings, accessories, and other applications.
{"title":"Milk Tea–Colored Perovskite Solar Cells Fabricated Through a Multilayer Film Design","authors":"Yu-Hung Chen, Ching-Chuan Chou, Hong-Shi Liu, Chien-Tso Lin, Yu-Pin Lin","doi":"10.1149/2162-8777/ad71f3","DOIUrl":"https://doi.org/10.1149/2162-8777/ad71f3","url":null,"abstract":"This study presents the fabrication of perovskite thin-film solar cells (PTSCs) with adjustable colors, achieved through a multilayer film design. The multilayer film, comprising Au and indium-tin-oxide (ITO), functions as an adjusted color reflectance (ACR) multilayer film. When the ITO thickness is varied from 100 to 150 nm, the color of the PTSCs can be adjusted from lighter shades that resemble fresh milk tea to darker tones akin to caramel. The color changes that the ACR multilayer film induces correlate well with its reflectance response. Compared with traditional black-colored PTSCs, the milk tea–colored PTSCs maintain a power conversion efficiency of >12%. This achievement suggests the potential for fabricating PTSCs in various colors and patterns that are suitable for use in furnishings, accessories, and other applications.","PeriodicalId":11496,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142189786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-30DOI: 10.1149/2162-8777/ad71f2
K. Ashok, P. Usha, Nagaraju R., T. Ramesh, N. Pavan Kumar, Ghassan M. Sulaiman
Zinc Ferrite (ZnFe2O4) nanoparticles were synthesized successfully via the modified ultrasonic-assisted co-precipitation method. Structural characterization, conducted through X-ray diffraction (XRD) analysis and Rietveld refinement, revealed a single cubic phase with a mixed spinel structure. Fourier transform infrared spectroscopy confirmed the presence of functional groups indicative of the spinel ferrite structure. Morphological analysis using field-emission scanning electron microscopy showcased the nanoparticles’ uniform morphology and size distribution. UV–vis spectra revealed the optical properties, while the Tauc Plot method determined the optical band gap. Electron paramagnetic resonance spectra confirm the symmetric resonance peak with 1254 Oe line width and the Lande g value 2.133. Magnetic hysteresis loops confirm the soft magnetic nature of the nanoparticles with magnetic saturation and coercivity of 39.2 emu gm−1 and 77.5 Oe. The anticancer properties against various cancer cell lines (HeLa, HepG-2 and MCF-7) revealed significant anticancer activity against HepG-2 and HeLa cells compared to MCF-7 cancer cells, and the results were compared with the standard drug cisplatin. A comparative analysis of results among cancer cell lines was conducted and discussed.
通过改良超声辅助共沉淀法成功合成了锌铁氧体（ZnFe2O4）纳米粒子。通过 X 射线衍射 (XRD) 分析和里特维尔德细化法进行的结构表征显示，该纳米粒子为具有混合尖晶石结构的单立方相。傅立叶变换红外光谱分析证实了尖晶石铁氧体结构中官能团的存在。利用场发射扫描电子显微镜进行的形态分析表明，纳米颗粒的形态和尺寸分布均匀一致。紫外-可见光谱显示了其光学特性，而陶氏图谱法则确定了其光带隙。电子顺磁共振光谱证实了线宽为 1254 Oe 的对称共振峰和 2.133 的 Lande g 值。磁滞回线证实了纳米粒子的软磁性质，其磁饱和度和矫顽力分别为 39.2 emu gm-1 和 77.5 Oe。针对各种癌细胞系（HeLa、HepG-2 和 MCF-7）的抗癌特性表明，与 MCF-7 癌细胞相比，HepG-2 和 HeLa 细胞具有显著的抗癌活性，并将结果与标准药物顺铂进行了比较。对不同癌细胞系的结果进行了比较分析和讨论。
{"title":"Multifunctional Characterization and Anticancer Properties of Magnetic Zinc Ferrite Nanoparticles by Modified Ultrasonic Assisted Co-precipitation Method","authors":"K. Ashok, P. Usha, Nagaraju R., T. Ramesh, N. Pavan Kumar, Ghassan M. Sulaiman","doi":"10.1149/2162-8777/ad71f2","DOIUrl":"https://doi.org/10.1149/2162-8777/ad71f2","url":null,"abstract":"Zinc Ferrite (ZnFe<sub>2</sub>O<sub>4</sub>) nanoparticles were synthesized successfully via the modified ultrasonic-assisted co-precipitation method. Structural characterization, conducted through X-ray diffraction (XRD) analysis and Rietveld refinement, revealed a single cubic phase with a mixed spinel structure. Fourier transform infrared spectroscopy confirmed the presence of functional groups indicative of the spinel ferrite structure. Morphological analysis using field-emission scanning electron microscopy showcased the nanoparticles’ uniform morphology and size distribution. UV–vis spectra revealed the optical properties, while the Tauc Plot method determined the optical band gap. Electron paramagnetic resonance spectra confirm the symmetric resonance peak with 1254 Oe line width and the Lande g value 2.133. Magnetic hysteresis loops confirm the soft magnetic nature of the nanoparticles with magnetic saturation and coercivity of 39.2 emu gm<sup>−1</sup> and 77.5 Oe. The anticancer properties against various cancer cell lines (HeLa, HepG-2 and MCF-7) revealed significant anticancer activity against HepG-2 and HeLa cells compared to MCF-7 cancer cells, and the results were compared with the standard drug cisplatin. A comparative analysis of results among cancer cell lines was conducted and discussed.","PeriodicalId":11496,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142189784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We report a two-step etching process involving inductively coupled plasma (ICP) etching followed by wet chemical etching to achieve smooth and vertical sidewalls, being beneficial for AlGaN-based electronic and optoelectronic devices. The influence of ICP power on the roughness of etched sidewalls is investigated. It is observed that ICP etching alone does not produce smooth sidewalls, necessitating subsequent wet chemical etching using tetramethyl ammonium hydroxide (TMAH) to enhance sidewall smoothness and reduce tilt angle. The morphological evolution of the etched sidewalls with wet etch time for the device structures is also thoroughly investigated. Consistent etch results are achieved for AlxGa1-xN alloys with Al compositions up to 70%, indicating the effectiveness of our etching process.
{"title":"Smooth and Vertical Sidewall Formation for AlGaN-Based Electronic and Optoelectronic Devices","authors":"Arnob Ghosh, Agnes Maneesha Dominic Merwin Xavier, Siddharth Rajan, Shamsul Arafin","doi":"10.1149/2162-8777/ad6f43","DOIUrl":"https://doi.org/10.1149/2162-8777/ad6f43","url":null,"abstract":"We report a two-step etching process involving inductively coupled plasma (ICP) etching followed by wet chemical etching to achieve smooth and vertical sidewalls, being beneficial for AlGaN-based electronic and optoelectronic devices. The influence of ICP power on the roughness of etched sidewalls is investigated. It is observed that ICP etching alone does not produce smooth sidewalls, necessitating subsequent wet chemical etching using tetramethyl ammonium hydroxide (TMAH) to enhance sidewall smoothness and reduce tilt angle. The morphological evolution of the etched sidewalls with wet etch time for the device structures is also thoroughly investigated. Consistent etch results are achieved for Al<sub>x</sub>Ga<sub>1-x</sub>N alloys with Al compositions up to 70%, indicating the effectiveness of our etching process.","PeriodicalId":11496,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142189785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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