1
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Bassett DC, Robinson TE, Hill RJ, Grover LM, Barralet JE. Self-assembled calcium pyrophosphate nanostructures for targeted molecular delivery. BIOMATERIALS ADVANCES 2022; 140:213086. [PMID: 35988368 DOI: 10.1016/j.bioadv.2022.213086] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 07/20/2022] [Accepted: 08/15/2022] [Indexed: 06/15/2023]
Abstract
Nanostructured, inorganic microspheres have many industrial applications, including catalysis, electronics, and particularly drug delivery, with several advantages over their organic counterparts. However, many current production methods require high energy input, use of harmful chemicals, and extensive processing. Here, the self-assembly of calcium pyrophosphate into nanofibre microspheres is reported. This process takes place at ambient temperature, with no energy input, and only salt water as a by-product. The formation of these materials is examined, as is the formation of nanotubes when the system is agitated, from initial precipitate to crystallisation. A mechanism of formation is proposed, whereby the nanofibre intermediates are formed as the system moves from kinetically favoured spheres to thermodynamically stable plates, with a corresponding increase in aspect ratio. The functionality of the nanofibre microspheres as targeted enteric drug delivery vehicles is then demonstrated in vitro and in vivo, showing that the microspheres can pass through the stomach while protecting the activity of a model protein, then release their payload in intestinal conditions.
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Affiliation(s)
- David C Bassett
- Healthcare Technologies Institute, School of Chemical Engineering, University of Birmingham, UK
| | - Thomas E Robinson
- Healthcare Technologies Institute, School of Chemical Engineering, University of Birmingham, UK
| | - Reghan J Hill
- Department of Chemical Engineering, McGill University, Canada
| | - Liam M Grover
- Healthcare Technologies Institute, School of Chemical Engineering, University of Birmingham, UK.
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2
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Gao Y, Zhang J, Liang J, Yuan D, Zhao W. Research Progress of Poly(methyl methacrylate) Microspheres: Preparation, Functionalization and Application. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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3
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Jeong SY, Kim JS, Lee JH. Rational Design of Semiconductor-Based Chemiresistors and their Libraries for Next-Generation Artificial Olfaction. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2002075. [PMID: 32930431 DOI: 10.1002/adma.202002075] [Citation(s) in RCA: 110] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 05/05/2020] [Indexed: 05/18/2023]
Abstract
Artificial olfaction based on gas sensor arrays aims to substitute for, support, and surpass human olfaction. Like mammalian olfaction, a larger number of sensors and more signal processing are crucial for strengthening artificial olfaction. Due to rapid progress in computing capabilities and machine-learning algorithms, on-demand high-performance artificial olfaction that can eclipse human olfaction becomes inevitable once diverse and versatile gas sensing materials are provided. Here, rational strategies to design a myriad of different semiconductor-based chemiresistors and to grow gas sensing libraries enough to identify a wide range of odors and gases are reviewed, discussed, and suggested. Key approaches include the use of p-type oxide semiconductors, multinary perovskite and spinel oxides, carbon-based materials, metal chalcogenides, their heterostructures, as well as heterocomposites as distinctive sensing materials, the utilization of bilayer sensor design, the design of robust sensing materials, and the high-throughput screening of sensing materials. In addition, the state-of-the-art and key issues in the implementation of electronic noses are discussed. Finally, a perspective on chemiresistive sensing materials for next-generation artificial olfaction is provided.
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Affiliation(s)
- Seong-Yong Jeong
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Jun-Sik Kim
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Jong-Heun Lee
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
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4
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Wang J, Ding H, Duan G, Zhou H, Song C, Pan J, Li C. Morphology-controllable gold hierarchically micro/nanostructured arrays prepared by electrodeposition on colloidal monolayer and their structurally related wettability. Chem Phys 2019. [DOI: 10.1016/j.chemphys.2019.04.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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5
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Kim JY, Cho SY, Jung HT. Selective Functionalization of High-Resolution Cu₂O Nanopatterns via Galvanic Replacement for Highly Enhanced Gas Sensing Performance. SENSORS 2018; 18:s18124438. [PMID: 30558265 PMCID: PMC6308504 DOI: 10.3390/s18124438] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Revised: 12/10/2018] [Accepted: 12/13/2018] [Indexed: 11/29/2022]
Abstract
Recently, high-resolution patterned metal oxide semiconductors (MOS) have gained considerable attention for enhanced gas sensing performance due to their polycrystalline nature, ultrasmall grain size (~5 nm), patternable properties, and high surface-to-volume ratio. Herein, we significantly enhanced the sensing performance of that patterned MOS by galvanic replacement, which allows for selective functionalization on ultrathin Cu2O nanopatterns. Based on the reduction potential energy difference between the base channel material (Cu2O) and the decorated metal ion (Pt2+), Pt could be selectively and precisely decorated onto the desired area of the Cu2O nanochannel array. Overall, the Pt-decorated Cu2O exhibited 11-fold higher NO2 (100 ppm) sensing sensitivity as compared to the non-decorated sensing channel, the while the channel device with excessive Pt doping showed complete loss of sensing properties.
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Affiliation(s)
- Ju Ye Kim
- Department of Chemical and Biomolecular Engineering (BK-21 Plus), Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Korea.
- Korea Advanced Institute of Science and Technology (KAIST) Institute for NanoCentury, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Korea.
| | - Soo-Yeon Cho
- Department of Chemical and Biomolecular Engineering (BK-21 Plus), Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Korea.
- Korea Advanced Institute of Science and Technology (KAIST) Institute for NanoCentury, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Korea.
| | - Hee-Tae Jung
- Department of Chemical and Biomolecular Engineering (BK-21 Plus), Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Korea.
- Korea Advanced Institute of Science and Technology (KAIST) Institute for NanoCentury, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Korea.
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6
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Chowdhury R, Barah N, Rashid MH. Facile Biopolymer Assisted Synthesis of Hollow SnO2Nanostructures and Their Application in Dye Removal. ChemistrySelect 2016. [DOI: 10.1002/slct.201600730] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Rakesh Chowdhury
- Department of Chemistry; Rajiv Gandhi University; Rono Hills Doimukh 791 112, Arunachal Pradesh, India
| | - Nilotpal Barah
- Department of Chemistry; Rajiv Gandhi University; Rono Hills Doimukh 791 112, Arunachal Pradesh, India
| | - Md. Harunar Rashid
- Department of Chemistry; Rajiv Gandhi University; Rono Hills Doimukh 791 112, Arunachal Pradesh, India
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7
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Xu Z, Duan G, Kong M, Su X, Cai W. Fabrication of α-Fe2
O3
porous array film and its crystallization effect on its H2
S sensing properties. ChemistrySelect 2016. [DOI: 10.1002/slct.201600163] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Zongke Xu
- Key Lab of Materials Physics; Anhui Key Lab of Nanomaterials and Nanotechnology; Institute of Solid State Physics; Chinese Academy of Sciences; Hefei 230031 P.R. China), Fax: (+86) 551-65591434
| | - Guotao Duan
- Key Lab of Materials Physics; Anhui Key Lab of Nanomaterials and Nanotechnology; Institute of Solid State Physics; Chinese Academy of Sciences; Hefei 230031 P.R. China), Fax: (+86) 551-65591434
| | - Mingguang Kong
- Key Lab of Materials Physics; Anhui Key Lab of Nanomaterials and Nanotechnology; Institute of Solid State Physics; Chinese Academy of Sciences; Hefei 230031 P.R. China), Fax: (+86) 551-65591434
| | - Xingsong Su
- Key Lab of Materials Physics; Anhui Key Lab of Nanomaterials and Nanotechnology; Institute of Solid State Physics; Chinese Academy of Sciences; Hefei 230031 P.R. China), Fax: (+86) 551-65591434
| | - Weiping Cai
- Key Lab of Materials Physics; Anhui Key Lab of Nanomaterials and Nanotechnology; Institute of Solid State Physics; Chinese Academy of Sciences; Hefei 230031 P.R. China), Fax: (+86) 551-65591434
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8
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Cho JS, Ju HS, Kang YC. Applying Nanoscale Kirkendall Diffusion for Template-Free, Kilogram-Scale Production of SnO2 Hollow Nanospheres via Spray Drying System. Sci Rep 2016; 6:23915. [PMID: 27033088 PMCID: PMC4817047 DOI: 10.1038/srep23915] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Accepted: 03/16/2016] [Indexed: 11/21/2022] Open
Abstract
A commercially applicable and simple process for the preparation of aggregation-free metal oxide hollow nanospheres is developed by applying nanoscale Kirkendall diffusion to a large-scale spray drying process. The precursor powders prepared by spray drying are transformed into homogeneous metal oxide hollow nanospheres through a simple post-treatment process. Aggregation-free SnO2 hollow nanospheres are selected as the first target material for lithium ion storage applications. Amorphous carbon microspheres with uniformly dispersed Sn metal nanopowder are prepared in the first step of the post-treatment process under a reducing atmosphere. The post-treatment of the Sn-C composite powder at 500 °C under an air atmosphere produces carbon- and aggregation-free SnO2 hollow nanospheres through nanoscale Kirkendall diffusion. The hollow and filled SnO2 nanopowders exhibit different cycling performances, with their discharge capacities after 300 cycles being 643 and 280 mA h g(-1), respectively, at a current density of 2 A g(-1). The SnO2 hollow nanospheres with high structural stability exhibit superior cycling and rate performances for lithium ion storage compared to the filled ones.
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Affiliation(s)
- Jung Sang Cho
- Department of Materials Science and Engineering, Korea University, Anam-Dong, Seongbuk-Gu, Seoul 136-713, Republic of Korea
| | - Hyeon Seok Ju
- Department of Materials Science and Engineering, Korea University, Anam-Dong, Seongbuk-Gu, Seoul 136-713, Republic of Korea
| | - Yun Chan Kang
- Department of Materials Science and Engineering, Korea University, Anam-Dong, Seongbuk-Gu, Seoul 136-713, Republic of Korea
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9
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Bao L, Zou X, Luo X, Pu Y, Lei J, Cao Q, Wang J. Monodispersed hollow polymer/iron eutectic nanospheres. RSC Adv 2016. [DOI: 10.1039/c6ra01754a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Monodispersed hollow polymer/iron eutectic nanoparticles with the size range of 18–30 nm were prepared by a simple method. These particles can be applied in chemical catalysis and nanoreactors.
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Affiliation(s)
- Lixia Bao
- School of Chemical Science and Technology
- Yunnan University
- Kunming 650091
- China
- State Key Laboratory of Polymer Materials Engineering
| | - Xin Zou
- School of Chemical Science and Technology
- Yunnan University
- Kunming 650091
- China
| | - Xin Luo
- School of Chemical Science and Technology
- Yunnan University
- Kunming 650091
- China
| | - Yanlei Pu
- School of Chemical Science and Technology
- Yunnan University
- Kunming 650091
- China
| | - Jingxin Lei
- State Key Laboratory of Polymer Materials Engineering
- Polymer Research Institute of Sichuan University
- Chengdu 610065
- China
| | - Qiue Cao
- School of Chemical Science and Technology
- Yunnan University
- Kunming 650091
- China
| | - Jiliang Wang
- School of Chemical Science and Technology
- Yunnan University
- Kunming 650091
- China
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10
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Shao S, Koehn R, Wu H, Wu T, Rao WF. Generation of highly ordered nanoporous Sb–SnO2 thin films with enhanced ethanol sensing performance at low temperature. NEW J CHEM 2016. [DOI: 10.1039/c5nj03463a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Highly ordered nanoporous Sb–SnO2 sensing films synthesized through psHT treatment present high sensitivity to 50 ppm ethanol at low temperature.
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Affiliation(s)
- Shaofeng Shao
- Department of Materials Physics
- School of Physics and Optoelectronic Engineering
- Nanjing University of Information Science & Technology
- Nanjing
- China
| | - Ralf Koehn
- Department of Chemistry & Biochemistry
- University of Munich
- Munich
- Germany
| | - Hongyan Wu
- Department of Materials Physics
- School of Physics and Optoelectronic Engineering
- Nanjing University of Information Science & Technology
- Nanjing
- China
| | - Tao Wu
- Department of Materials Physics
- School of Physics and Optoelectronic Engineering
- Nanjing University of Information Science & Technology
- Nanjing
- China
| | - Wei-Feng Rao
- Department of Materials Physics
- School of Physics and Optoelectronic Engineering
- Nanjing University of Information Science & Technology
- Nanjing
- China
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11
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Cho JS, Kang YC. Nanofibers Comprising Yolk-Shell Sn@void@SnO/SnO₂ and Hollow SnO/SnO₂ and SnO₂ Nanospheres via the Kirkendall Diffusion Effect and Their Electrochemical Properties. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 11:4673-4681. [PMID: 26058833 DOI: 10.1002/smll.201500940] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Revised: 05/13/2015] [Indexed: 06/04/2023]
Abstract
Nanofibers with a unique structure comprising Sn@void@SnO/SnO2 yolk-shell nanospheres and hollow SnO/SnO2 and SnO2 nanospheres are prepared by applying the nanoscale Kirkendall diffusion process in conventional electrospinning process. Under a reducing atmosphere, post-treatment of tin 2-ethylhexanoate-polyvinylpyrrolidone electrospun nanofibers produce carbon nanofibers with embedded spherical Sn nanopowders. The Sn nanopowders are linearly aligned along the carbon nanofiber axis without aggregation of the nanopowders. Under an air atmosphere, oxidation of the Sn-C composite nanofibers produce nanofibers comprising Sn@void@SnO/SnO2 yolk-shell nanospheres and hollow SnO/SnO2 and SnO2 nanospheres, depending on the post-treatment temperature. The mean sizes of the hollow nanospheres embedded within tin oxide nanofibers post-treated at 500 °C and 600 °C are 146 and 117 nm, respectively. For the 250th cycle, the discharge capacities of the nanofibers prepared by the nanoscale Kirkendall diffusion process post-treated at 400 °C, 500 °C, and 600 °C at a high current density of 2 A g(-1) are 663, 630, and 567 mA h g(-1), respectively. The corresponding capacity retentions are 77%, 84%, and 78%, as calculated from the second cycle. The nanofibers prepared by applying the nanoscale Kirkendall diffusion process exhibit superior electrochemical properties compared with those of the porous-structured SnO2 nanofibers prepared by the conventional post-treatment process.
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Affiliation(s)
- Jung Sang Cho
- Department of Materials Science and Engineering, Korea University, Anam-Dong, Seongbuk-Gu, Seoul, 136-713, Republic of Korea
| | - Yun Chan Kang
- Department of Materials Science and Engineering, Korea University, Anam-Dong, Seongbuk-Gu, Seoul, 136-713, Republic of Korea
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12
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Wang L, Lou Z, Deng J, Zhang R, Zhang T. Ethanol Gas Detection Using a Yolk-Shell (Core-Shell) α-Fe2O3 Nanospheres as Sensing Material. ACS APPLIED MATERIALS & INTERFACES 2015; 7:13098-104. [PMID: 26010465 DOI: 10.1021/acsami.5b03978] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Three-dimensional (3D) nanostructures of α-Fe2O3 materials, including both hollow sphere-shaped and yolk-shell (core-shell)-shaped, have been successfully synthesized via an environmentally friendly hydrothermal approach. By expertly adjusting the reaction time, the solid, hollow, and yolk-shell shaped α-Fe2O3 can be selectively synthesized. Yolk-shell α-Fe2O3 nanospheres display outer diameters of 350 nm, and the interstitial hollow spaces layer is intimately sandwiched between the inner and outer shell of α-Fe2O3 nanostructures. The possible growth mechanism of the yolk-shell nanostructure is proposed. The results showed that the well-defined bilayer interface effectively enhanced the sensing performance of the α-Fe2O3 nanostructures (i.e., yolk-shell α-Fe2O3@α-Fe2O3), owing predominantly to the unique nanostructure, thus facilitated the transport rate and augmented the adsorption quantity of the target gas molecule under gas detection.
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Affiliation(s)
- LiLi Wang
- †State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, PR China
| | - Zheng Lou
- ‡State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
| | - Jianan Deng
- †State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, PR China
| | - Rui Zhang
- †State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, PR China
| | - Tong Zhang
- †State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, PR China
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13
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Xie D, Hou Y, Su Y, Gao F, Du J. Templated fabrication of hollow nanospheres with 'windows' of accurate size and tunable number. NANOSCALE RESEARCH LETTERS 2015; 10:153. [PMID: 25897304 PMCID: PMC4395623 DOI: 10.1186/s11671-015-0795-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/05/2015] [Accepted: 01/31/2015] [Indexed: 06/04/2023]
Abstract
The 'windows' or 'doors' on the surface of a closed hollow structure can enable the exchange of material and information between the interior and exterior of one hollow sphere or between two hollow spheres, and this information or material exchange can also be controlled through altering the window' size. Thus, it is very interesting and important to achieve the fabrication and adjustment of the 'windows' or 'doors' on the surface of a closed hollow structure. In this paper, we propose a new method based on the temple-assisted deposition method to achieve the fabrication of hollow spheres with windows of accurate size and number. Through precisely controlling of deposition parameters (i.e., deposition angle and number), hollow spheres with windows of total size from 0% to 50% and number from 1 to 6 have been successfully achieved. A geometrical model has been developed for the morphology simulation and size calculation of the windows, and the simulation results meet well with the experiment. This model will greatly improve the convenience and efficiency of this temple-assisted deposition method. In addition, these hollow spheres with desired windows also can be dispersed into liquid or arranged regularly on any desired substrate. These advantages will maximize their applications in many fields, such as drug transport and nano-research container.
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Affiliation(s)
- Duan Xie
- />School of Physical Science and Technology, Sichuan University, Chengdu, Sichuan 610064 China
| | - Yidong Hou
- />School of Physical Science and Technology, Sichuan University, Chengdu, Sichuan 610064 China
| | - Yarong Su
- />School of Physical Science and Technology, Sichuan University, Chengdu, Sichuan 610064 China
| | - Fuhua Gao
- />School of Physical Science and Technology, Sichuan University, Chengdu, Sichuan 610064 China
- />Key Laboratory of High Energy Density Physics and Technology, Ministry of Education, Sichuan University, Chengdu, Sichuan 610064 China
| | - Jinglei Du
- />School of Physical Science and Technology, Sichuan University, Chengdu, Sichuan 610064 China
- />Key Laboratory of High Energy Density Physics and Technology, Ministry of Education, Sichuan University, Chengdu, Sichuan 610064 China
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14
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Choi SJ, Choi C, Kim SJ, Cho HJ, Jeon S, Kim ID. Facile synthesis of hierarchical porous WO3 nanofibers having 1D nanoneedles and their functionalization with non-oxidized graphene flakes for selective detection of acetone molecules. RSC Adv 2015. [DOI: 10.1039/c4ra13791d] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Hierarchical and porous one-dimensional (1D) nonwoven WO3 nanofibers were synthesized by electrospinning and controlled two-step heat-treatment, and are applicable for diabetes diagnostic sensors by selective detection of breath acetone.
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Affiliation(s)
- Seon-Jin Choi
- Department of Materials Science and Engineering
- Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon 305-701, Republic of Korea
| | - Chanyong Choi
- Department of Materials Science and Engineering and Graphene Research Center of KI for the NanoCentury
- Korea Advanced Institute of Science and Technology
- Daejeon 305-701, Republic of Korea
| | - Sang-Joon Kim
- Department of Materials Science and Engineering
- Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon 305-701, Republic of Korea
| | - Hee-Jin Cho
- Department of Materials Science and Engineering
- Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon 305-701, Republic of Korea
| | - Seokwoo Jeon
- Department of Materials Science and Engineering and Graphene Research Center of KI for the NanoCentury
- Korea Advanced Institute of Science and Technology
- Daejeon 305-701, Republic of Korea
| | - Il-Doo Kim
- Department of Materials Science and Engineering
- Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon 305-701, Republic of Korea
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15
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16
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17
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Lin Y, Li C, Wei W, Li Y, Wen S, Sun D, Chen Y, Ruan S. A new type of acetylene gas sensor based on a hollow heterostructure. RSC Adv 2015. [DOI: 10.1039/c5ra10327d] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A new type of acetylene gas sensor based on the hollow NiO/SnO2 heterostructure synthesized by a two-step hydrothermal method followed by calcination was fabricated.
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Affiliation(s)
- Ying Lin
- State Key Laboratory on Integrated Optoelectronics
- Jilin University
- Changchun 130012
- P. R. China
| | - Chao Li
- State Key Laboratory on Integrated Optoelectronics
- Jilin University
- Changchun 130012
- P. R. China
| | - Wei Wei
- State Key Laboratory on Integrated Optoelectronics
- Jilin University
- Changchun 130012
- P. R. China
| | - Yujia Li
- College of Electronic Science and Engineering
- Jilin University
- Changchun 130012
- P. R. China
| | - Shanpeng Wen
- State Key Laboratory on Integrated Optoelectronics
- Jilin University
- Changchun 130012
- P. R. China
| | - Dongming Sun
- State Key Laboratory on Integrated Optoelectronics
- Jilin University
- Changchun 130012
- P. R. China
| | - Yu Chen
- Institute of Semiconductors
- Chinese Academy of Sciences
- Beijing 100083
- China
| | - Shengping Ruan
- College of Electronic Science and Engineering
- Jilin University
- Changchun 130012
- P. R. China
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18
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Choi SJ, Kim MP, Lee SJ, Kim BJ, Kim ID. Facile Au catalyst loading on the inner shell of hollow SnO2 spheres using Au-decorated block copolymer sphere templates and their selective H2S sensing characteristics. NANOSCALE 2014; 6:11898-11903. [PMID: 25175492 DOI: 10.1039/c4nr03706e] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Hollow SnO2 spheres functionalized by Au catalysts were synthesized via the use of Au-decorated block copolymer (Au-BCP) sphere templates. Uniformly distributed Au nanoparticles on BCP spheres were prepared by the infiltration of Au precursors into polystyrene-b-poly(4-vinylpyridine) (PS-b-P4VP) spheres. A thin SnO2 layer was coated on the Au-BCP spheres using RF sputtering at room temperature without morphological deformation of the spheres. The Au nanoparticles were uniformly transferred from the Au-BCP spheres to the inner shells of the hollow SnO2 spheres followed by decomposition of BCP spheres. The Au-loaded hollow SnO2 spheres exhibited a superior H2S sensitivity (Rair/Rgas = 17.4 at 5 ppm) with remarkably selective characteristics with a minor response (Rair/Rgas < 2.5 at 5 ppm) toward other interfering gases. Our results pave the way for a new catalyst loading method using Au-BCP spheres for the uniformly distributed Au NPs on the SnO2 layers.
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Affiliation(s)
- Seon-Jin Choi
- Department of Material Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Republic of Korea.
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19
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Dai Z, Lee CS, Kim BY, Kwak CH, Yoon JW, Jeong HM, Lee JH. Honeycomb-like periodic porous LaFeO₃ thin film chemiresistors with enhanced gas-sensing performances. ACS APPLIED MATERIALS & INTERFACES 2014; 6:16217-26. [PMID: 25166756 DOI: 10.1021/am504386q] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The use of composite materials and polynary compounds is a promising strategy to promote conductometric sensor performances. The perovskite oxides provide various compositional combinations between different oxides for tuning gas-sensing reaction and endowing rich oxygen deficiencies for preferable gas adsorption. Herein, a sacrificial colloidal template approach is exploited to fabricate crystalline ternary LaFeO3 perovskite porous thin films, by transferring a La(3+)-Fe(3+) hybrid solution-dipped template onto a substrate and sequent heat treatment. The honeycomb-like LaFeO3 film consisted of monolayer periodic pore (size: ∼ 500 nm) array can be successfully in situ synthesized in a homogeneous layout with a single phase of perovskite. This periodic porous LaFeO3 film with p-type semiconductivity exhibits a high gas response, fast response (∼4 s), trace detection capacity (50 ppb), and favorable ethanol selectivity from similar acetone. It exhibits enhanced sensing performances compared to those of a binary n-type Fe2O3 film and a nontemplated dense LaFeO3 film. In addition, a five-axe spiderweb diagram is introduced to make a feasible evaluation of the optimal practical work condition, comprehensively regarding the response/recovery rate, gas response, selectivity and operating temperature. The enhanced ethanol sensing mechanism of honeycomb-like LaFeO3 periodic porous film is also addressed. This novel and facile route to fabricate well-ordered porous LaFeO3 thin film can also be applied to many fields to obtain special performances, such as solar cells, ion conductors, gas separation, piezoelectricity, and self-powered sensing device system.
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Affiliation(s)
- Zhengfei Dai
- Department of Materials Science and Engineering, Korea University , Seoul 136-713, Republic of Korea
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Rai P, Khan R, Raj S, Majhi SM, Park KK, Yu YT, Lee IH, Sekhar PK. Au@Cu2O core-shell nanoparticles as chemiresistors for gas sensor applications: effect of potential barrier modulation on the sensing performance. NANOSCALE 2014; 6:581-8. [PMID: 24241354 DOI: 10.1039/c3nr04118b] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Au@Cu2O core-shell nanoparticles (NPs) were synthesized by a solution method at room temperature and applied for gas sensor applications. Transmission electron microscopy (TEM) images showed the formation of Au@Cu2O core-shell NPs, where 12-15 nm Au NPs were covered with 60-30 nm Cu2O shell layers. The surface plasmon resonance (SPR) peak of Au NPs was red-shifted (520-598 nm) after Cu2O shell formation. The response of Au@Cu2O core-shell NPs was higher than that of bare Cu2O NPs to CO at different temperatures and concentrations. Similarly, the response of Au@Cu2O core-shell NPs was higher than that of bare Cu2O NPs for NO2 gas at low temperature. The improved performance of Au@Cu2O core-shell NPs was attributed to the pronounced electronic sensitization, high thermal stability and low screening effect of Au NPs.
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Affiliation(s)
- Prabhakar Rai
- Division of Advanced Materials Engineering and Research Centre for Advanced Materials Development, College of Engineering, Chonbuk National University, Jeonju 561-756, South Korea.
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21
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Zhang Z, Song H, Zhang S, Zhang J, Bao W, Zhao Q, Wu X. Selective epichlorohydrin-sensing performance of Ag nanoparticles decorated porous SnO2architectures. CrystEngComm 2014. [DOI: 10.1039/c3ce41478g] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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22
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Dai Z, Jia L, Duan G, Li Y, Zhang H, Wang J, Hu J, Cai W. Crack-Free Periodic Porous Thin Films Assisted by Plasma Irradiation at Low Temperature and Their Enhanced Gas-Sensing Performance. Chemistry 2013; 19:13387-95. [DOI: 10.1002/chem.201301137] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Revised: 07/03/2013] [Indexed: 11/10/2022]
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23
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Wang J, Duan G, Li Y, Liu G, Dai Z, Zhang H, Cai W. An invisible template method toward gold regular arrays of nanoflowers by electrodeposition. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:3512-3517. [PMID: 23451855 DOI: 10.1021/la400433z] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A new approach, an invisible template method that is realized through controlling the interface electroconductivity of an electrode surface, is presented to synthesize gold regular arrays of nanoflowers with variable separations through further electrochemical deposition. Using polystyrene monolayer colloidal crystals as the first template, a hexagonally packed 1-hexadecanethiol pattern was self-assembled and used as an invisible template to control the interface electroconductivity. Further electrochemical deposition under appropriate conditions can easily lead to gold regular arrays of nanoflowers. This new approach demonstrates a simple route to the fabrication of novel gold micro/nanostructured arrays that may find applications as SERS active substrates, superhydrophobic materials, and so forth.
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Affiliation(s)
- Jingjing Wang
- Key Lab of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, Anhui, PR China
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24
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Choi SJ, Lee I, Jang BH, Youn DY, Ryu WH, Park CO, Kim ID. Selective Diagnosis of Diabetes Using Pt-Functionalized WO3 Hemitube Networks As a Sensing Layer of Acetone in Exhaled Breath. Anal Chem 2013; 85:1792-6. [DOI: 10.1021/ac303148a] [Citation(s) in RCA: 243] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Seon-Jin Choi
- Department of Materials
Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Republic
of Korea
| | - Inkun Lee
- Department of Materials
Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Republic
of Korea
| | - Bong-Hoon Jang
- Department of Materials
Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Republic
of Korea
| | - Doo-Young Youn
- Department of Materials
Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Republic
of Korea
| | - Won-Hee Ryu
- Department of Materials
Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Republic
of Korea
| | - Chong Ook Park
- Department of Materials
Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Republic
of Korea
| | - Il-Doo Kim
- Department of Materials
Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Republic
of Korea
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25
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Xiao G, Wang Y, Ning J, Wei Y, Liu B, Yu WW, Zou G, Zou B. Recent advances in IV–VI semiconductor nanocrystals: synthesis, mechanism, and applications. RSC Adv 2013. [DOI: 10.1039/c3ra23209c] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
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26
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Wang L, Luo X, Zheng X, Wang R, Zhang T. Direct annealing of electrospun synthesized high-performance porous SnO2 hollow nanofibers for gas sensors. RSC Adv 2013. [DOI: 10.1039/c3ra41032c] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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27
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Core–shell polymerization for monodispersed hollow polymer spheres embedded with magnetic nanoparticles. J IND ENG CHEM 2012. [DOI: 10.1016/j.jiec.2012.03.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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28
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Liu R, Yang S, Wang F, Lu X, Yang Z, Ding B. Sodium chloride template synthesis of cubic tin dioxide hollow particles for lithium ion battery applications. ACS APPLIED MATERIALS & INTERFACES 2012; 4:1537-1542. [PMID: 22276802 DOI: 10.1021/am201756m] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
This paper describes a new synthesis and lithium ion charge-discharge property of tin dioxide (SnO(2)) hollow nanocubes. SnO(2) is one of the best-known anode materials for lithium-ion battery application because of its high lithiation-delithiation capacity. Hollow nanostructures with high surface area are preferred, because they accommodate large volume changes and maintain the structural stability of electrode materials during charge-discharge cycles. The SnO(2) hollow cubes made in this study had a discharge capacity of up to 1783 mA h g(-1) for the initial cycle and 546 mA h g(-1) after 30 cycles at a current density of 0.2 C between 0.02 and 2.0 V (vs Li/Li(+)).
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Affiliation(s)
- Rui Liu
- School of Science, MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter, Shaan Xi, Xi'an Jiaotong University, 710049, People's Republic of China
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29
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Wang Y, Su X, Lu S. Shape-controlled synthesis of TiO2hollow structures and their application in lithium batteries. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c1jm14637h] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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30
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Zhang H, He Q, Zhu X, Pan D, Deng X, Jiao Z. Surfactant-free solution phase synthesis of monodispersed SnO2 hierarchical nanostructures and gas sensing properties. CrystEngComm 2012. [DOI: 10.1039/c2ce06558d] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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31
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Huang J, Xu X, Gu C, Yao S, Sun Y, Liu J. Large-scale selective preparation of porous SnO2 3D architectures and their gas-sensing property. CrystEngComm 2012. [DOI: 10.1039/c2ce06738b] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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32
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Jiang C, Zhang G, Wu Y, Li L, Shi K. Facile synthesis of SnO2 nanocrystalline tubes by electrospinning and their fast response and high sensitivity to NOx at room temperature. CrystEngComm 2012. [DOI: 10.1039/c2ce06405g] [Citation(s) in RCA: 94] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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33
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Liu B, Xu J, Ran S, Wang Z, Chen D, Shen G. High-performance photodetectors, photocatalysts, and gas sensors based on polyol reflux synthesized porous ZnO nanosheets. CrystEngComm 2012. [DOI: 10.1039/c2ce25278c] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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34
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Wang L, Fei T, Deng J, Lou Z, Wang R, Zhang T. Synthesis of rattle-type SnO2 structures with porous shells. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm32520a] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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35
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Wang L, Lou Z, Wang R, Fei T, Zhang T. Ring-like PdO–NiO with lamellar structure for gas sensor application. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm16509k] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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Wu W, Zhang S, Ren F, Xiao X, Zhou J, Jiang C. Controlled synthesis of magnetic iron oxides@SnO2 quasi-hollow core-shell heterostructures: formation mechanism, and enhanced photocatalytic activity. NANOSCALE 2011; 3:4676-4684. [PMID: 21947413 DOI: 10.1039/c1nr10728c] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Iron oxide/SnO(2) magnetic semiconductor core-shell heterostructures with high purity were synthesized by a low-cost, surfactant-free and environmentally friendly hydrothermal strategy via a seed-mediated method. The morphology and structure of the hybrid nanostructures were characterized by means of high-resolution transmission electron microscopy and X-ray diffraction. The morphology evolution investigations reveal that the Kirkendall effect directs the diffusion and causes the formation of iron oxide/SnO(2) quasi-hollow particles. Significantly, the as-obtained iron oxides/SnO(2) core-shell heterostructures exhibited enhanced visible light or UV photocatalytic abilities, remarkably superior to as-used α-Fe(2)O(3) seeds and commercial SnO(2) products, mainly owing to the effective electron hole separation at the iron oxides/SnO(2) interfaces.
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Affiliation(s)
- Wei Wu
- School of Printing and Packaging, Wuhan University, Wuhan, 430072, PR China.
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37
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Wu W, Zhang S, Zhou J, Xiao X, Ren F, Jiang C. Controlled Synthesis of Monodisperse Sub-100 nm Hollow SnO2 Nanospheres: A Template- and Surfactant-Free Solution-Phase Route, the Growth Mechanism, Optical Properties, and Application as a Photocatalyst. Chemistry 2011; 17:9708-19. [DOI: 10.1002/chem.201100694] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2011] [Indexed: 11/06/2022]
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38
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Fabrication of Hierarchical SnO 2 Nanocrystals and their Sensing Properties to Volatile Organic Compound Vapors. ACTA ACUST UNITED AC 2011. [DOI: 10.4028/www.scientific.net/amr.266.1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hierarchical SnO2 (H-SnO2) and particulate SnO2 (P-SnO2) nanostructures were synthesized by a hydrothermal method with and without the aid of sodium 1-dodecanesulfonate (SDS), respectively. X-ray diffraction and scanning electron microscopy were used to characterize the products obtained. The sensing properties of the H-SnO2 and P-SnO2 nanostructures to volatile organic compound gas (VOCs) were measured. The H-SnO2 sensors show better gas-sensing performance than the P-SnO2 sensors due to the hierarchical microstructure.
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39
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Li Z, Zhao Q, Fan W, Zhan J. Porous SnO2 nanospheres as sensitive gas sensors for volatile organic compounds detection. NANOSCALE 2011; 3:1646-1652. [PMID: 21279215 DOI: 10.1039/c0nr00728e] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Porous SnO(2) nanospheres with high surface areas have been synthesized through a solvothermal method in the absence of any templates. The structure and morphology of the resultant products were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and nitrogen adsorption-desorption technique. The as-prepared SnO(2) porous nanospheres with the diameters ranging from 90-150 nm are composed of small nanocrystals with average sizes of less than 10 nm. Results demonstrated that the formation of porous SnO(2) nanospheres is ascribed to etching the center part of the nanospheres. It was found that hydrochloric acid and NaClO played important roles in determining the final morphologies of the porous SnO(2) nanospheres. The gas sensing properties of the as-prepared porous SnO(2) nanospheres were investigated. By the comparative gas sensing tests, the porous SnO(2) nanospheres exhibited a superior gas sensing performance toward ppb level 2-chloroethanol and formaldehyde vapor, implying promising applications in detecting toxic volatile organic compounds (VOCs).
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Affiliation(s)
- Zhipeng Li
- Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Department of Chemistry, Shandong University, Jinan, 250100, Shandong, PR China
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40
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Hu J, Chen M, Fang X, Wu L. Fabrication and application of inorganic hollow spheres. Chem Soc Rev 2011; 40:5472-91. [DOI: 10.1039/c1cs15103g] [Citation(s) in RCA: 710] [Impact Index Per Article: 54.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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41
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Kim ID, Rothschild A. Nanostructured metal oxide gas sensors prepared by electrospinning. POLYM ADVAN TECHNOL 2010. [DOI: 10.1002/pat.1797] [Citation(s) in RCA: 109] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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42
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Electrospun porous SnO2 nanotubes as high capacity anode materials for lithium ion batteries. Electrochem commun 2010. [DOI: 10.1016/j.elecom.2010.07.026] [Citation(s) in RCA: 136] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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43
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Xiao L, Shen H, von Hagen R, Pan J, Belkoura L, Mathur S. Microwave assisted fast and facile synthesis of SnO(2) quantum dots and their printing applications. Chem Commun (Camb) 2010; 46:6509-11. [PMID: 20697624 DOI: 10.1039/c0cc01156h] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient synthesis of highly crystalline SnO(2) QDs with a narrow size distribution (4.27 +/- 0.67 nm) was achieved by microwave-assisted decomposition of Sn(OtBu)(4) in ionic liquid. Printed structures fabricated from SnO(2) QDs showed typical semiconducting I-V behaviors, and gas sensing properties.
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Affiliation(s)
- Lisong Xiao
- Institute of Inorganic Chemistry, University of Cologne, Cologne 50939, Germany
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44
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Ye QL, Yoshikawa H, Awaga K. Magnetic and Optical Properties of Submicron-Size Hollow Spheres. MATERIALS 2010. [PMCID: PMC5513466 DOI: 10.3390/ma3021244] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Magnetic hollow spheres with a controlled diameter and shell thickness have emerged as an important class of magnetic nanomaterials. The confined hollow geometry and pronouncedly curved surfaces induce unique physical properties different from those of flat thin films and solid counterparts. In this paper, we focus on recent progress on submicron-size spherical hollow magnets (e.g., cobalt- and iron-based materials), and discuss the effects of the hollow shape and the submicron size on magnetic and optical properties.
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Affiliation(s)
- Quan-Lin Ye
- Authors to whom correspondence should be addressed; E-Mails: (Q.Y.); (K.A.); Tel.: +81-52-789-2484; Fax: +81-52-789-2484
| | | | - Kunio Awaga
- Authors to whom correspondence should be addressed; E-Mails: (Q.Y.); (K.A.); Tel.: +81-52-789-2484; Fax: +81-52-789-2484
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45
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Kim HR, Choi KI, Kim KM, Kim ID, Cao G, Lee JH. Ultra-fast responding and recovering C2H5OH sensors using SnO2 hollow spheres prepared and activated by Ni templates. Chem Commun (Camb) 2010; 46:5061-3. [DOI: 10.1039/c0cc00213e] [Citation(s) in RCA: 153] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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