The Experts below are selected from a list of 3231 Experts worldwide ranked by ideXlab platform
Yinthai Chan - One of the best experts on this subject based on the ideXlab platform.
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formation of hollow iron oxide tetrapods via a shape preserving nanoscale Kirkendall Effect
Small, 2014Co-Authors: Jie Lian, Kelvin Anggara, Yinthai ChanAbstract:Hollow iron oxide tetrapods are synthesized by exposing iron precursors to hollow ultrathin PtS tetrapods. Surprisingly, the heterogeneous nucleation and growth of iron takes place exclusively within the PtS interior. Oxidation of the resulting iron tetrapod produces a hollow iron oxide shell via a shape-preserving Kirkendall Effect which preserves the morphology of the original tetrapod with remarkably high precision, offering a robust synthetic route to hollow iron oxide nanostructures of unprecedented geometry.
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Formation of Hollow Iron Oxide Tetrapods via a Shape‐Preserving Nanoscale Kirkendall Effect
Small, 2013Co-Authors: Jie Lian, Kelvin Anggara, Yinthai ChanAbstract:Hollow iron oxide tetrapods are synthesized by exposing iron precursors to hollow ultrathin PtS tetrapods. Surprisingly, the heterogeneous nucleation and growth of iron takes place exclusively within the PtS interior. Oxidation of the resulting iron tetrapod produces a hollow iron oxide shell via a shape-preserving Kirkendall Effect which preserves the morphology of the original tetrapod with remarkably high precision, offering a robust synthetic route to hollow iron oxide nanostructures of unprecedented geometry.
Xiaodong Chen - One of the best experts on this subject based on the ideXlab platform.
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controlled synthesis of hollow cu2 xte nanocrystals based on the Kirkendall Effect and their enhanced co gas sensing properties
Small, 2013Co-Authors: Guanjun Xiao, Yi Zeng, Yueyue Jiang, Jiajia Ning, Weitao Zheng, Xiaodong ChenAbstract:This paper develops a facile solution-based method to synthesize hollow Cu2-x Te nanocrystals (NCs) with tunable interior volume based on the Kirkendall Effect. Transmission electron microscopy images and time-dependent absorption spectra reveal the temporal growth process from solid copper nanoparticles to hollow Cu2-x Te NCs. Furthermore, the as-prepared hollow Cu2-x Te NCs show enhanced sensitivity for the detection of carbon monoxide (CO), which is often referred to as the "silent killer". The response and recovery time of the as-prepared sensor for the detection of 100 ppm CO gas are estimated to be about 21 and 100 s, respectively, which are sufficient to render it a promising candidate for Effective CO gas-sensing applications. Such enhanced performance is achieved owing to the small grain size and large specific area of the hollow nanostructures. Therefore, the obtained hollow NCs based on the Kirkendall Effect may have the potential as new functional blocks for high-performance gas sensors.
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Controlled Synthesis of Hollow Cu2‐xTe Nanocrystals Based on the Kirkendall Effect and Their Enhanced CO Gas‐Sensing Properties
Small, 2012Co-Authors: Guanjun Xiao, Yi Zeng, Yueyue Jiang, Jiajia Ning, Weitao Zheng, Xiaodong ChenAbstract:This paper develops a facile solution-based method to synthesize hollow Cu2-xTe nanocrystals (NCs) with tunable interior volume based on the Kirkendall Effect. Transmission electron microscopy images and time-dependent absorption spectra reveal the temporal growth process from solid copper nanoparticles to hollow Cu2-xTe NCs. Furthermore, the as-prepared hollow Cu2-xTe NCs show enhanced sensitivity for the detection of carbon monoxide (CO), which is often referred to as the “silent killer”. The response and recovery time of the as-prepared sensor for the detection of 100 ppm CO gas are estimated to be about 21 and 100 s, respectively, which are sufficient to render it a promising candidate for Effective CO gas-sensing applications. Such enhanced performance is achieved owing to the small grain size and large specific area of the hollow nanostructures. Therefore, the obtained hollow NCs based on the Kirkendall Effect may have the potential as new functional blocks for high-performance gas sensors.
Jie Lian - One of the best experts on this subject based on the ideXlab platform.
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formation of hollow iron oxide tetrapods via a shape preserving nanoscale Kirkendall Effect
Small, 2014Co-Authors: Jie Lian, Kelvin Anggara, Yinthai ChanAbstract:Hollow iron oxide tetrapods are synthesized by exposing iron precursors to hollow ultrathin PtS tetrapods. Surprisingly, the heterogeneous nucleation and growth of iron takes place exclusively within the PtS interior. Oxidation of the resulting iron tetrapod produces a hollow iron oxide shell via a shape-preserving Kirkendall Effect which preserves the morphology of the original tetrapod with remarkably high precision, offering a robust synthetic route to hollow iron oxide nanostructures of unprecedented geometry.
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Formation of Hollow Iron Oxide Tetrapods via a Shape‐Preserving Nanoscale Kirkendall Effect
Small, 2013Co-Authors: Jie Lian, Kelvin Anggara, Yinthai ChanAbstract:Hollow iron oxide tetrapods are synthesized by exposing iron precursors to hollow ultrathin PtS tetrapods. Surprisingly, the heterogeneous nucleation and growth of iron takes place exclusively within the PtS interior. Oxidation of the resulting iron tetrapod produces a hollow iron oxide shell via a shape-preserving Kirkendall Effect which preserves the morphology of the original tetrapod with remarkably high precision, offering a robust synthetic route to hollow iron oxide nanostructures of unprecedented geometry.
Marie Buffiere - One of the best experts on this subject based on the ideXlab platform.
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highly ordered hollow oxide nanostructures the Kirkendall Effect at the nanoscale
Small, 2013Co-Authors: Carla Bittencourt, Marie Buffiere, P Y Tessier, Stephanos Konstantinidis, Wei Xu, Ke Du, Ishan Wathuthanthri, Changhwan Choi, Rony SnydersAbstract:Highly ordered ultra-long oxide nanotubes are fabricated by a simple two-step strategy involving the growth of copper nanowires on nanopatterned template substrates by magnetron sputtering, followed by thermal annealing in air. The formation of such tubular nanostructures is explained according to the nanoscale Kirkendall Effect. The concept of this new fabrication route is also extendable to create periodic zero-dimensional hollow nanostructures.
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Fabrication of highly ordered hollow oxide nanostructures based on nanoscale Kirkendall Effect and ostwald ripening
2013 IEEE 5th International Nanoelectronics Conference (INEC), 2013Co-Authors: Marie Buffiere, Carla Bittencourt, P Y Tessier, Stephanos Konstantinidis, Wei Xu, Ke Du, Changhwan Choi, Rony SnydersAbstract:Highly ordered oxide nanotubes are fabricated by a simple two-step method which consists of the magnetron sputtering deposition of copper nanowires on nanograted template surfaces and the thermal oxidation of the nanowires in ambient air at 300 °C. The formation of the organized copper oxide nanotubes is explained according to the nanoscale Kirkendall Effect which comes into play at the metal/metal-oxide interface during the annealing process.
Wenli Zhou - One of the best experts on this subject based on the ideXlab platform.
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core decomposition facilitated fabrication of hollow rare earth silicate nanowalnuts from core shell structures via the Kirkendall Effect
Nanoscale, 2015Co-Authors: Wenli Zhou, Xianfeng Yang, Ningyu Huang, Junjian Huang, Hongbin Liang, Jing WangAbstract:Hollow micro-/nanostructures have been widely applied in the fields of lithium ion batteries, catalysis, biosensing, biomedicine, and so forth. The Kirkendall Effect, which involves a non-equilibrium mutual diffusion process, is one of many important fabrication strategies for the formation of hollow nanomaterials. Accordingly, full understanding of the interdiffusion process at the nanoscale is very important for the development of novel multifunctional hollow materials. In this work, hollow Y2SiO5 nanowalnuts have been fabricated from the conversion of YOHCO3@SiO2 core–shell nanospheres via the Kirkendall Effect. More importantly, it was found that in the conversion process, the decomposition of YOHCO3 core imposes on the formation of the Y2SiO5 interlayer by facilitating the initial nucleation of the Kirkendall nanovoids and accelerating the interfacial diffusion of Y2O3@SiO2 core@shell. The simple concept developed herein can be employed as a general Kirkendall Effect strategy without the assistance of any catalytically active Pt nanocrystals or gold motion for future fabrication of novel hollow nanostructures. Moreover, the photoluminescence properties of rare-earth ion doped hollow Y2SiO5 nanoparticles are researched.
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Core-decomposition-facilitated fabrication of hollow rare-earth silicate nanowalnuts from core–shell structures via the Kirkendall Effect
Nanoscale, 2015Co-Authors: Wenli Zhou, Xianfeng Yang, Ningyu Huang, Junjian Huang, Hongbin Liang, Jing WangAbstract:Hollow micro-/nanostructures have been widely applied in the fields of lithium ion batteries, catalysis, biosensing, biomedicine, and so forth. The Kirkendall Effect, which involves a non-equilibrium mutual diffusion process, is one of many important fabrication strategies for the formation of hollow nanomaterials. Accordingly, full understanding of the interdiffusion process at the nanoscale is very important for the development of novel multifunctional hollow materials. In this work, hollow Y2SiO5 nanowalnuts have been fabricated from the conversion of YOHCO3@SiO2 core–shell nanospheres via the Kirkendall Effect. More importantly, it was found that in the conversion process, the decomposition of YOHCO3 core imposes on the formation of the Y2SiO5 interlayer by facilitating the initial nucleation of the Kirkendall nanovoids and accelerating the interfacial diffusion of Y2O3@SiO2 core@shell. The simple concept developed herein can be employed as a general Kirkendall Effect strategy without the assistance of any catalytically active Pt nanocrystals or gold motion for future fabrication of novel hollow nanostructures. Moreover, the photoluminescence properties of rare-earth ion doped hollow Y2SiO5 nanoparticles are researched.
