نتایج جستجو برای: au nanoporous

تعداد نتایج: 83376  

Journal: :Journal of nanoscience and nanotechnology 2002
Sebastian Polarz B Smarsly

The current review article attempts to cover the field of nanoporous materials, thereby materials with voids of the order of 1 nm to 100 nm or even larger. Concepts, that have an effect on a more general basis, are introduced and the common features among the different classes of nanoporous materials are demonstrated enabling understanding their formation and stability. It is seen that the most...

2015
Wence Xu Shengli Zhu Yanqin Liang Zhaoyang Li Zhenduo Cui Xianjin Yang Akihisa Inoue

We present the rational synthesis of nanoporous CuS for the first time by chemical dealloying method. The morphologies of the CuS catalysts are controlled by the composition of the original amorphous alloys. Nanoporous Cu2S is firstly formed during the chemical dealloying process, and then the Cu2S transforms into CuS. The nanoporous CuS exhibits excellent photocatalytic activity for the degrad...

2007
V Vega Victor M Prida M Hernández-Vélez E Manova P Aranda E Ruiz-Hitzky Manuel Vázquez

Self-aligned nanoporous TiO2 templates synthesized via dc current electrochemical anodization have been carefully analyzed. The influence of environmental temperature during the anodization, ranging from 2 C to ambient, on the structure and morphology of the nanoporous oxide formation has been investigated, as well as that of the HF electrolyte chemical composition, its concentration and their ...

2010
Lihua Qian Biswajit Das Howard R. Hughes

Tuning localized surface plasmon resonance (LSPR) of nanoporous metals is crucial to manipulate light within tiny volumes for the implementation of optical devices at the nanoscale. Herein, nanoporous gold-alumina core-shell films with constant gold skeleton and variable alumina sheaths are fabricated by means of chemical corrosion and subsequent atomic layer deposition. Optical transmission pr...

2004
H. J. Peng Y. L. Ho X. J. Yu H. S. Kwok

We have demonstrated an approach to enhance the light extraction efficiency for organic light emitting diode sOLEDd. Nanoporous alumina film was used to modify the optical wave propagation and coupling of light from the OLED. Experimental results showed an increase of over 50% in the coupling efficiency of the nanoporous device, without affecting the electrical properties of the OLED. Effective...

2014
Chohui Kim Hongsik Choi Jae Ik Kim Sangheon Lee Jinhyun Kim Woojin Lee Taehyun Hwang Suji Kang Taeho Moon Byungwoo Park

A scattering layer is utilized by mixing nanoporous spheres and nanoparticles in ZnO-based dye-sensitized solar cells. Hundred-nanometer-sized ZnO spheres consisting of approximately 35-nm-sized nanoparticles provide not only effective light scattering but also a large surface area. Furthermore, ZnO nanoparticles are added to the scattering layer to facilitate charge transport and increase the ...

2012
Sangbeom Hwang Simon Song

We propose a non-equilibrium electrokinetic (EK) mixer with a nanoporous membrane fabricated on a microfluidic chip by laser polymerization technique. A non-equilibrium EK mixer had an array of nanochannels to generate a vortex using ion depletion and consequent electroconvection [1]. The nanochannels, however, require expensive and complicated fabrication processes. On the other hand, the lase...

Journal: :Small 2016
Yung-Han Shih Chien-Ping Fu Wan-Ling Liu Chia-Her Lin Hsi-Ya Huang Shengqian Ma

Surface-assisted laser desorption/ionization mass spectrometry (SALDI-MS) represents a powerful tool for the analysis of biomolecules, synthetic polymers, and even small organic compounds; its performances largely depend on the type of matrix materials utilized. Here, for the first time the employment of nanoporous carbons derived from metal-organic frameworks (MOFs) as novel matrices for SALDI...

Journal: :Langmuir : the ACS journal of surfaces and colloids 2012
Micheál D Scanlon Urszula Salaj-Kosla Serguei Belochapkine Domhnall MacAodha Dónal Leech Yi Ding Edmond Magner

The high surface areas of nanostructured electrodes can provide for significantly enhanced surface loadings of electroactive materials. The fabrication and characterization of nanoporous gold (np-Au) substrates as electrodes for bioelectrochemical applications is described. Robust np-Au electrodes were prepared by sputtering a gold-silver alloy onto a glass support and subsequent dealloying of ...

Journal: :MRS Advances 2021

Abstract Segmentation of scanning electron microscopy (SEM) images focused ion beam (FIB) cross-sections through indented regions in nanoporous gold (np-Au) is carried out. A key challenge for image analysis open porous materials the appropriate binarization pore and ligament while excluding material lying below cross-sectional plane. Here, a manual approach to thresholding compared global loca...

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