نتایج جستجو برای: au nano dendrites

تعداد نتایج: 138680  

2013
Chengming Zhang Lequan Liu Xinjiang Cui Lirong Zheng Youquan Deng Feng Shi

The controllable preparation of nano-gold catalyst maintains a challenge. Except the parameters have been revealed before, here we'd like to show that controllable preparation of active nano-gold catalyst can be achieved using chlorine as an indicator. By tracing the chlorine concentration in the washing step, a series of Au/Fe2O3 catalysts were prepared with co-precipitation method. The applyi...

2010
Hyeongwook Im Yong Hyup Kim

Noble metal nanoslit structure has attracted an increasing interest in nanoscale photonic devices, and bio applications. However, methods typically used for fabricating nano-sized slit, such as, e-beam direct etching, template-assisted photolithography, and nano-imprint lithography, have low yield and are limited to sub-nano sized slit. In this work, we observed that slit width of Au metal is g...

2011
Fei Zhao Guo-an Cheng Rui-ting Zheng Dan-dan Zhao Shao-long Wu Jian-hua Deng

Au-Si nano-particle-decorated silicon nanowire arrays have been fabricated by Au film deposition on silicon nanowire array substrates and then post-thermal annealing under hydrogen atmosphere. Field emission measurements illustrated that the turn-on fields of the non-annealed Au-coated SiNWs were 6.02 to 7.51 V/μm, higher than that of the as-grown silicon nanowires, which is about 5.01 V/μm. Me...

2015
Bin Dai Qinqin Wang Feng Yu Mingyuan Zhu

A detailed study of the valence state and distribution of the AuCl3/AC catalyst during the acetylene hydrochlorination deactivation process is described and discussed. Temperature-programmed reduction and X-ray photoelectron spectral analysis indicate that the active Au(3+) reduction to metallic Au(0) is one reason for the deactivation of AuCl3/AC catalyst. Transmission electron microscopy char...

2015
Ming-Yu Li Quanzhen Zhang Puran Pandey Mao Sui Eun-Soo Kim Jihoon Lee

The control over the configuration, size, and density of Au nanoparticles (NPs) has offered a promising route to control the spatial confinement of electrons and photons, as a result, Au NPs with a various configuration, size and density are witnessed in numerous applications. In this work, we investigate the evolution of self-assembled Au nanostructures on 4H-SiC (0001) by the systematic varia...

2010
Tai-Hsuan Lin Ching-Wei Lin Hao-Heng Liu Jeng-Tzong Sheu Wei-Hsiu Hung

Gold (Au) nanostructures have attracted much attention because their chemical and physical properties differ considerably from those of bulk Au. The flurry of research activity into nanosized Au has been stimulated by its diverse range of prospective applications. For example, the nano-structured Au electrodes exhibit a strong catalytic activity for the oxidation of CO and CH3OH and the reducti...

Journal: :Advances in Materials and Processing Technologies 2022

Selective laser melting technique is used to manufacture Al-25 wt.%Si and Al-30 surface layers with a thickness of 0.5–0.6 mm followed by rapid solidification process refine the silicon nano-size increase hardness. The as-produced alloyed were heterogeneous composed clustered aggregates primary Si crystals size 5–7 µm, decorated α-Al cells/dendrites, embedded in matrix consisting dendritic Al-S...

2015
Puran Pandey Mao Sui Ming-Yu Li Quanzhen Zhang Eun-Soo Kim Jihoon Lee Sefer Bora Lisesivdin

Au nano-clusters and nanoparticles (NPs) have been widely utilized in various electronic, optoelectronic, and bio-medical applications due to their great potentials. The size, density and configuration of Au NPs play a vital role in the performance of these devices. In this paper, we present a systematic study on the self-assembled hexagonal Au voids, nano-clusters and NPs fabricated on GaN (00...

2014
A. Ishak

The micro and nano-structured amorphous carbon as p-type films prepared from natural palm oil precursor for heterojunction solar cell were presented. Field-emission scanning electron microscopy (FESEM) revealed the micro and nano structured films had particle size in the range of 382 nm to 689 nm and 28 to 34 nm, respectively. The energy-dispersive spectroscopy (EDS) showed the existing of carb...

2014
A. Ishak M. Rusop

The complex and nano-structured amorphous carbon as p-type films prepared from natural palm oil precursor for heterojunction solar cell were presented. Field-emission scanning electron microscopy (FESEM) revealed the nano structured films had particle size in the range of 28 to 34 nm. The energy-dispersive spectroscopy (EDS) showed the existing of carbon in complex-structured amorphous carbon f...

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