Md. Ferdous Rahman, Md. Al Ijajul Islam, Md. Rasidul Islam, Md. Hasan Ali, Pobitra Barman, Md. Azizur Rahman, Md. Harun‐Or‐Rashid, Mehedi Hasan, M. Khalid Hossain
Abstract The remarkable structural, optical, and electronic characteristics of inorganic perovskite materials have generated significant enthusiasm within the field of solar technology. The material Ca 3 PI 3 belongs to the same category as inorganic metal halide perovskites. This research utilized the first‐principles density functional theory (FP‐DFT) to examine how the optical and electronic characteristics of Ca 3 PI 3 are impacted by strain. To accurately determine the band arrangement, we incorporated the relativistic spin‐orbit coupling (SOC) effect into our calculations. The planar Ca 3 PI 3 molecule has a direct bandgap of 1.582 eV (PBE) at its Г(gamma)‐point, but while the relativistic SOC effect is included, the bandgap decreases to 1.329 eV. Under compressive strain, the bandgap of all structures decreases, whereas under tensile strain, it increases. The optical characteristics of Ca 3 PI 3 , including the dielectric function, absorption coefficient, and electron loss function, indicate its strong absorption capabilities in the visible range, driven by its band properties. Besides, the photon energy spectrum displays a red‐shift (blue‐shift) in the absorption coefficient and dielectric function with increasing amounts of compressive (tensile) strain. Therefore, the study of the strain‐induced optical and electronic characteristics of Ca 3 PI 3 bears valuable implications for its potential use in the design of solar cells and optoelectronic devices.
无机钙钛矿材料具有显著的结构、光学和电子特性，在太阳能技术领域引起了极大的热情。材料ca3pi3与无机金属卤化物钙钛矿属于同一类别。本研究利用第一性原理密度泛函理论(FP - DFT)研究了Ca 3 PI 3的光学和电子特性如何受到应变的影响。为了准确地确定能带的排列，我们将相对论性自旋轨道耦合(SOC)效应纳入了我们的计算中。平面ca3pi - 3分子在Г(gamma)点处的直接带隙为1.582 eV (PBE)，但考虑到相对论性SOC效应，带隙减小到1.329 eV。在压缩应变下，各结构的带隙减小，而在拉伸应变下，各结构的带隙增大。Ca 3 PI 3的光学特性，包括介电函数、吸收系数和电子损失函数，表明其在可见光范围内具有很强的吸收能力，这是由其能带特性驱动的。此外，随着压缩应变(拉伸应变)的增加，光子能谱的吸收系数和介电函数呈现红移(蓝移)。因此，研究ca3pi - 3的应变诱导光学和电子特性对其在太阳能电池和光电子器件设计中的潜在应用具有重要意义。
{"title":"Investigation of a novel inorganic cubic perovskite Ca<sub>3</sub>PI<sub>3</sub> with unique strain‐driven optical, electronic, and mechanical properties","authors":"Md. Ferdous Rahman, Md. Al Ijajul Islam, Md. Rasidul Islam, Md. Hasan Ali, Pobitra Barman, Md. Azizur Rahman, Md. Harun‐Or‐Rashid, Mehedi Hasan, M. Khalid Hossain","doi":"10.1002/nano.202300066","DOIUrl":"https://doi.org/10.1002/nano.202300066","url":null,"abstract":"Abstract The remarkable structural, optical, and electronic characteristics of inorganic perovskite materials have generated significant enthusiasm within the field of solar technology. The material Ca 3 PI 3 belongs to the same category as inorganic metal halide perovskites. This research utilized the first‐principles density functional theory (FP‐DFT) to examine how the optical and electronic characteristics of Ca 3 PI 3 are impacted by strain. To accurately determine the band arrangement, we incorporated the relativistic spin‐orbit coupling (SOC) effect into our calculations. The planar Ca 3 PI 3 molecule has a direct bandgap of 1.582 eV (PBE) at its Г(gamma)‐point, but while the relativistic SOC effect is included, the bandgap decreases to 1.329 eV. Under compressive strain, the bandgap of all structures decreases, whereas under tensile strain, it increases. The optical characteristics of Ca 3 PI 3 , including the dielectric function, absorption coefficient, and electron loss function, indicate its strong absorption capabilities in the visible range, driven by its band properties. Besides, the photon energy spectrum displays a red‐shift (blue‐shift) in the absorption coefficient and dielectric function with increasing amounts of compressive (tensile) strain. Therefore, the study of the strain‐induced optical and electronic characteristics of Ca 3 PI 3 bears valuable implications for its potential use in the design of solar cells and optoelectronic devices.","PeriodicalId":74238,"journal":{"name":"Nano select : open access","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136072204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Emiliano S. Dal Molin, Laura M. Henning, Julian T. Müller, Glen J. Smales, Brian R. Pauw, Maged F. Bekheet, Aleksander Gurlo, Ulla Simon
Hierarchically porous, high‐surface‐area silica materials are excellent candidates for multiple applications like catalysis and environmental remediation. Shaping these materials with additive manufacturing (AM) techniques, like robocasting, could enable their use with the benefit of on‐demand, customized shaping and maximizing performance. Herein, ordered mesoporous silica COK‐12 slurries were robocasted into monoliths, containing different ratios of uncalcined COK‐12 and sodium bentonite (0–25 wt.%). The rheology of the mixed slurries is characterized by lower flow indexes (0.69 vs. 0.32) and higher yield stresses (96 vs. 259 Pa) compared to pure COK‐12 ones. Monoliths were printed in woodpile structures and calcined at 600°C. Micro‐CT measurements showed a linear shrinkage of 25% after calcination. Mechanical characterization showed increased uniaxial strength (0.20 ± 0.07 to 1.0 ± 0.3 MPa) with increasing binder/solids ratio from 13 to 25%. The amorphous, mesoporous structure of COK‐12 was retained. The structures exhibited open porosities of 52 ± 4% and showed higher specific mesopore volumes, and increased average mesopore size (6 vs. 8 nm) compared to COK‐12. Small‐angle x‐ray scattering analysis revealed an increased lattice parameter (10.3 vs. 11.0 nm) and reduced wall thickness (3.1 nm vs. 4.1 nm) of the COK‐12 in the monoliths. These properties indicate suitability for their application as porous supports and adsorbents.
分层多孔，高表面积的二氧化硅材料是催化和环境修复等多种应用的优秀候选者。使用增材制造(AM)技术(如机器人铸造)对这些材料进行成型，可以使其具有按需、定制成型和最大化性能的优势。在这里，有序的介孔二氧化硅COK‐12浆料被机械铸造成整体，含有不同比例的未煅烧的COK‐12和钠膨润土(0-25 wt.%)。与纯COK‐12相比，混合浆料的流变学特点是流动指数(0.69 vs. 0.32)较低，屈服应力(96 vs. 259 Pa)较高。在木桩结构中印刷单体，并在600°C下煅烧。微CT测量显示，煅烧后的线性收缩为25%。力学特性表明，粘结剂/固体比从13%增加到25%，单轴强度从0.20±0.07增加到1.0±0.3 MPa。COK‐12的无定形介孔结构得以保留。与COK‐12相比，该结构的开孔率为52±4%，具有更高的介孔体积和平均介孔尺寸(6 nm vs. 8 nm)。小角度x射线散射分析显示，COK - 12的晶格参数增加(10.3 nm vs. 11.0 nm)，壁厚减少(3.1 nm vs. 4.1 nm)。这些特性表明了它们作为多孔载体和吸附剂的适用性。
{"title":"Robocasting of ordered mesoporous silica‐based monoliths: Rheological, textural, and mechanical characterization","authors":"Emiliano S. Dal Molin, Laura M. Henning, Julian T. Müller, Glen J. Smales, Brian R. Pauw, Maged F. Bekheet, Aleksander Gurlo, Ulla Simon","doi":"10.1002/nano.202300109","DOIUrl":"https://doi.org/10.1002/nano.202300109","url":null,"abstract":"Hierarchically porous, high‐surface‐area silica materials are excellent candidates for multiple applications like catalysis and environmental remediation. Shaping these materials with additive manufacturing (AM) techniques, like robocasting, could enable their use with the benefit of on‐demand, customized shaping and maximizing performance. Herein, ordered mesoporous silica COK‐12 slurries were robocasted into monoliths, containing different ratios of uncalcined COK‐12 and sodium bentonite (0–25 wt.%). The rheology of the mixed slurries is characterized by lower flow indexes (0.69 vs. 0.32) and higher yield stresses (96 vs. 259 Pa) compared to pure COK‐12 ones. Monoliths were printed in woodpile structures and calcined at 600°C. Micro‐CT measurements showed a linear shrinkage of 25% after calcination. Mechanical characterization showed increased uniaxial strength (0.20 ± 0.07 to 1.0 ± 0.3 MPa) with increasing binder/solids ratio from 13 to 25%. The amorphous, mesoporous structure of COK‐12 was retained. The structures exhibited open porosities of 52 ± 4% and showed higher specific mesopore volumes, and increased average mesopore size (6 vs. 8 nm) compared to COK‐12. Small‐angle x‐ray scattering analysis revealed an increased lattice parameter (10.3 vs. 11.0 nm) and reduced wall thickness (3.1 nm vs. 4.1 nm) of the COK‐12 in the monoliths. These properties indicate suitability for their application as porous supports and adsorbents.","PeriodicalId":74238,"journal":{"name":"Nano select : open access","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136072009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Alaa Mahran, E. Özliseli, Qingbo Wang, Ilayda Özliseli, R. Bhadane, Chunlin Xu, Xiaoju Wang, J. Rosenholm
Multifunctional biomaterial inks are in high demand for adapting hydrogels in biomedical applications through three‐dimensional (3D) printing. Our previously developed xeno‐free system consisting of anionic cellulose nanofibers (T‐CNF) and methacrylated galactoglucomannan (GGMMA) as a photo(bio)polymer provides high‐performance ink fidelity in extrusion‐based 3D printing. The fusion between nanoparticles and this biomaterial‐ink system is a promising yet challenging avenue worth exploring, due to the colloidal stability of T‐CNF being sensitive to electrostatic interactions. Mesoporous silica nanoparticles (MSNs), with their robust ceramic matrix and fine‐tunable surface chemistries, are well‐established nanocarriers for different biologicals. Here, we fabricated MSNs with different surface modifications resulting in a net surface charge ranging from highly negative to highly positive to develop printable MSNs‐laden nanocomposite biomaterial inks. We utilized rheology as a comprehensive tool to address the matrix interactions with differently surface‐charged MSNs. Fluorescently labeled bovine serum albumin (FITC‐BSA) was used as a model protein for MSN loading, whereby negatively or neutral‐charged MSNs were found suitable to formulate FITC‐BSA‐loaded biomaterial inks of T‐CNF/GGMMA. Depending on the particles’ surface charge, FITC‐BSA showed different release profiles and preserved its stability after release. Lastly, the proof‐of‐concept to deliver large‐sized biological cargo with MSN‐laden nanocomposite biomaterial inks was established via the 3D printing technique.
{"title":"Semi‐solid 3D printing of mesoporous silica nanoparticle‐incorporated xeno‐free nanomaterial hydrogels for protein delivery","authors":"Alaa Mahran, E. Özliseli, Qingbo Wang, Ilayda Özliseli, R. Bhadane, Chunlin Xu, Xiaoju Wang, J. Rosenholm","doi":"10.1002/nano.202300097","DOIUrl":"https://doi.org/10.1002/nano.202300097","url":null,"abstract":"Multifunctional biomaterial inks are in high demand for adapting hydrogels in biomedical applications through three‐dimensional (3D) printing. Our previously developed xeno‐free system consisting of anionic cellulose nanofibers (T‐CNF) and methacrylated galactoglucomannan (GGMMA) as a photo(bio)polymer provides high‐performance ink fidelity in extrusion‐based 3D printing. The fusion between nanoparticles and this biomaterial‐ink system is a promising yet challenging avenue worth exploring, due to the colloidal stability of T‐CNF being sensitive to electrostatic interactions. Mesoporous silica nanoparticles (MSNs), with their robust ceramic matrix and fine‐tunable surface chemistries, are well‐established nanocarriers for different biologicals. Here, we fabricated MSNs with different surface modifications resulting in a net surface charge ranging from highly negative to highly positive to develop printable MSNs‐laden nanocomposite biomaterial inks. We utilized rheology as a comprehensive tool to address the matrix interactions with differently surface‐charged MSNs. Fluorescently labeled bovine serum albumin (FITC‐BSA) was used as a model protein for MSN loading, whereby negatively or neutral‐charged MSNs were found suitable to formulate FITC‐BSA‐loaded biomaterial inks of T‐CNF/GGMMA. Depending on the particles’ surface charge, FITC‐BSA showed different release profiles and preserved its stability after release. Lastly, the proof‐of‐concept to deliver large‐sized biological cargo with MSN‐laden nanocomposite biomaterial inks was established via the 3D printing technique.","PeriodicalId":74238,"journal":{"name":"Nano select : open access","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42281182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The aim of the current study is to investigate the impact of layer coupling on the characteristics of high TC superconductor Nd2‐xCexCuO4 (NCCO). In this study, the intra‐ and inter‐layer couplings are taken into consideration. By applying the double time Green's function (GF) technique and formulating a model Hamiltonian, the transition temperature (TC) of superconductor Nd2‐xCexCuO4 is computed quantitatively by considering the intra‐ and inter‐layer interactions as independent variables. By increasing the layer interactions, the increase in TC is observed. Furthermore, TC is calculated by taking into consideration different number of interlayer interactions as independent variables which subsequently resulted in the enhancement of TC. Besides, TC has been computed as a function of electron doping as a result of which a dome shaped figure has been perceived in the temperature versus doping phase diagram. The superconducting order parameter (Δ) has been also reckoned as a function of temperature and is observed to gradually decrease as temperature increases and eventually vanishes at TC. A slight increment in TC is observed as the doping values of charge carriers increase. Our findings are discussed in connection with the experimental studies of superconductivity (SC) in Nd2CuO4 based layered compounds.
{"title":"Theoretical investigation of the impact of intra‐ and inter‐layer coupling of high TC superconductor Nd2‐xCexCuO4","authors":"Zewdie Yayeh, G. Kahsay, T. Negussie","doi":"10.1002/nano.202300047","DOIUrl":"https://doi.org/10.1002/nano.202300047","url":null,"abstract":"The aim of the current study is to investigate the impact of layer coupling on the characteristics of high TC superconductor Nd2‐xCexCuO4 (NCCO). In this study, the intra‐ and inter‐layer couplings are taken into consideration. By applying the double time Green's function (GF) technique and formulating a model Hamiltonian, the transition temperature (TC) of superconductor Nd2‐xCexCuO4 is computed quantitatively by considering the intra‐ and inter‐layer interactions as independent variables. By increasing the layer interactions, the increase in TC is observed. Furthermore, TC is calculated by taking into consideration different number of interlayer interactions as independent variables which subsequently resulted in the enhancement of TC. Besides, TC has been computed as a function of electron doping as a result of which a dome shaped figure has been perceived in the temperature versus doping phase diagram. The superconducting order parameter (Δ) has been also reckoned as a function of temperature and is observed to gradually decrease as temperature increases and eventually vanishes at TC. A slight increment in TC is observed as the doping values of charge carriers increase. Our findings are discussed in connection with the experimental studies of superconductivity (SC) in Nd2CuO4 based layered compounds.","PeriodicalId":74238,"journal":{"name":"Nano select : open access","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43818167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Sayadi, N. Fahoul, Javad Kharkan, Masoumeh Khairieh
The aim of this study is to investigate the protective effects of Elaeagnus angustifolia fruit extract (EAFE) on hematology, biochemical parameters, liver enzymes and damage of different tissues of male mice exposed to graphene oxide nanoparticles (GO NPs). In this research, 48 mice were divided into six groups. Hematology parameters including red blood cells (RBC), white blood cells (WBC), hematocrit (Ht), and hemoglobin (Hb), biochemical parameters such as cholesterol, triglyceride, glucose, protein, albumin, creatinine and bilirubin, liver enzymes including aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase (ALP) and lactate dehydrogenase (LDH) and histological damage of liver, kidney, lung and testis of mice were investigated. The results show that GO NPs in both concentrations (30 and 60 mg/kg/bw) decrease the number of RBC compared to the control group (p < 0.05). EAFE has no effect on RBC count while EAFE in combination with both concentrations of 30 and 60 mg/kg/bw GO NPs significantly (p < 0.05) improves the RBC count of mice. Also, the results show that EAFE improves the number of WBC, Ht, Hb, and biochemical parameters of mice exposed to different concentrations of GO NPs. A series of morphological changes were observed in the RBC of rats exposed to 60 mg/kg/bw GO NPs, including Dacrocyte, Poikilocyte and Schistocyte, which EAFE can improve the morphological changes caused in RBC. A series of histological damages such as degeneration and dilatation in the central vein in liver tissue, thickening and inflammatory cell infiltration in the renal capsule, peribronchiolar inflammatory cell infiltration and congestion in peribronchiolar blood vessels in lung tissue and decrease in the height of the germinal epithelium and a decrease in the population of spermatozoid cells in spermatogenic cells were observed in the testis of mice exposed to 60 mg/kg/bw GO NPs. The results show that EAFE can improve the damage caused by GO NPs in the liver, kidney and lung tissues, while it has no effect on the damage in the mice testis tissue. Therefore, GO NPs cause damage in the blood and different tissues of mice, and the use of EAFE can be effective in improving these damages.
{"title":"Investigating the protective effects of Elaeagnus angustifolia fruit extract on hematological parameters and damage of different tissues of male mice exposed to graphene oxide nanoparticles","authors":"M. Sayadi, N. Fahoul, Javad Kharkan, Masoumeh Khairieh","doi":"10.1002/nano.202300070","DOIUrl":"https://doi.org/10.1002/nano.202300070","url":null,"abstract":"The aim of this study is to investigate the protective effects of Elaeagnus angustifolia fruit extract (EAFE) on hematology, biochemical parameters, liver enzymes and damage of different tissues of male mice exposed to graphene oxide nanoparticles (GO NPs). In this research, 48 mice were divided into six groups. Hematology parameters including red blood cells (RBC), white blood cells (WBC), hematocrit (Ht), and hemoglobin (Hb), biochemical parameters such as cholesterol, triglyceride, glucose, protein, albumin, creatinine and bilirubin, liver enzymes including aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase (ALP) and lactate dehydrogenase (LDH) and histological damage of liver, kidney, lung and testis of mice were investigated. The results show that GO NPs in both concentrations (30 and 60 mg/kg/bw) decrease the number of RBC compared to the control group (p < 0.05). EAFE has no effect on RBC count while EAFE in combination with both concentrations of 30 and 60 mg/kg/bw GO NPs significantly (p < 0.05) improves the RBC count of mice. Also, the results show that EAFE improves the number of WBC, Ht, Hb, and biochemical parameters of mice exposed to different concentrations of GO NPs. A series of morphological changes were observed in the RBC of rats exposed to 60 mg/kg/bw GO NPs, including Dacrocyte, Poikilocyte and Schistocyte, which EAFE can improve the morphological changes caused in RBC. A series of histological damages such as degeneration and dilatation in the central vein in liver tissue, thickening and inflammatory cell infiltration in the renal capsule, peribronchiolar inflammatory cell infiltration and congestion in peribronchiolar blood vessels in lung tissue and decrease in the height of the germinal epithelium and a decrease in the population of spermatozoid cells in spermatogenic cells were observed in the testis of mice exposed to 60 mg/kg/bw GO NPs. The results show that EAFE can improve the damage caused by GO NPs in the liver, kidney and lung tissues, while it has no effect on the damage in the mice testis tissue. Therefore, GO NPs cause damage in the blood and different tissues of mice, and the use of EAFE can be effective in improving these damages.","PeriodicalId":74238,"journal":{"name":"Nano select : open access","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45963690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lai Hnuna, El-Abed Haidar, Bezzerga Djamel, C. Stampfl, Sahnoun Mohammed, Z. Pachuau
{"title":"First‐principles study of optical and thermoelectric properties of Zn3As2 and ZnSb","authors":"Lai Hnuna, El-Abed Haidar, Bezzerga Djamel, C. Stampfl, Sahnoun Mohammed, Z. Pachuau","doi":"10.1002/nano.202300074","DOIUrl":"https://doi.org/10.1002/nano.202300074","url":null,"abstract":"","PeriodicalId":74238,"journal":{"name":"Nano select : open access","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44494792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Small thiophene fluorophores in live cells promote protein self‐assembly into nanostructured fluorescent and electroactive microfibers","authors":"I. Palamà, G. Maiorano, G. Barbarella, G. Gigli","doi":"10.1002/nano.202300007","DOIUrl":"https://doi.org/10.1002/nano.202300007","url":null,"abstract":"","PeriodicalId":74238,"journal":{"name":"Nano select : open access","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43230145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yuanjie Xia, Mengyao Yuan, Alexandra Dobrea, Chong Li, Hadi Heidari, Nigel Mottram, Rami Ghannam
Abstract The antenna is one of the key building blocks of many wearable electronic devices, and its functions include wireless communications, energy harvesting, and radiative wireless power transfer. In an effort to realize lightweight, autonomous, and battery‐less wearable devices, we demonstrate a reconfigurable antenna design for 5G wearable applications that requires ultra‐low driving voltages (0.4–0.6 V) and operates over a high frequency range (3.3–3.8 GHz). For smart glasses applications, previous antenna designs were ‘fixed’ and mounted on the eyeglass frame itself. Here, we demonstrate a reconfigurable design that could be achieved on the lens itself using an anisotropic liquid crystal (LC) material. We demonstrate how liquid crystal alignment and electric field patterns strongly influence the tuning capabilities of these antennas in the gigahertz range and present a smart, reconfigurable spiral antenna system with a liquid crystal substrate.
{"title":"Reconfigurable wearable antenna for 5G applications using nematic liquid crystals","authors":"Yuanjie Xia, Mengyao Yuan, Alexandra Dobrea, Chong Li, Hadi Heidari, Nigel Mottram, Rami Ghannam","doi":"10.1002/nano.202200209","DOIUrl":"https://doi.org/10.1002/nano.202200209","url":null,"abstract":"Abstract The antenna is one of the key building blocks of many wearable electronic devices, and its functions include wireless communications, energy harvesting, and radiative wireless power transfer. In an effort to realize lightweight, autonomous, and battery‐less wearable devices, we demonstrate a reconfigurable antenna design for 5G wearable applications that requires ultra‐low driving voltages (0.4–0.6 V) and operates over a high frequency range (3.3–3.8 GHz). For smart glasses applications, previous antenna designs were ‘fixed’ and mounted on the eyeglass frame itself. Here, we demonstrate a reconfigurable design that could be achieved on the lens itself using an anisotropic liquid crystal (LC) material. We demonstrate how liquid crystal alignment and electric field patterns strongly influence the tuning capabilities of these antennas in the gigahertz range and present a smart, reconfigurable spiral antenna system with a liquid crystal substrate.","PeriodicalId":74238,"journal":{"name":"Nano select : open access","volume":"143 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135557043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Z. Yazdanpanah, Farinaz Ketabat, Patsy Gómez-Picos, Alice Raquin, A. Fazel Anvari‐Yazdi, B. Eames, J. Johnston, D. Cooper, Xiongbiao Chen
{"title":"3D printed PCL/nHAp scaffolds: Influence of scaffold structural parameters on osteoblast performance in vitro","authors":"Z. Yazdanpanah, Farinaz Ketabat, Patsy Gómez-Picos, Alice Raquin, A. Fazel Anvari‐Yazdi, B. Eames, J. Johnston, D. Cooper, Xiongbiao Chen","doi":"10.1002/nano.202300048","DOIUrl":"https://doi.org/10.1002/nano.202300048","url":null,"abstract":"","PeriodicalId":74238,"journal":{"name":"Nano select : open access","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44719776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Nanomaterials: An overview of synthesis, classification, characterization, and applications","authors":"Bawoke Mekuye, B. Abera","doi":"10.1002/nano.202300038","DOIUrl":"https://doi.org/10.1002/nano.202300038","url":null,"abstract":"","PeriodicalId":74238,"journal":{"name":"Nano select : open access","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46727256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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