2008年2月29日 · Detailed analyses of the ADF-STEM imaging, the electron diffraction pattern and the FFT pattern of HRTEM images complementarily show that the Pd shell epitaxially grows on the Au core expanded with the same lattice constant as …

2008年6月1日 · In this article, transmission electron microscopy (TEM) and high-angle annular dark-field-scanning transmission electron microscopy (HAADF-STEM) observations are applied to the Au/CeO 2 systems.

2020年4月21日 · Here, the dynamic process of nanoporous Au to catalyze methane pyrolysis is monitored by in situ transmission electron microscopy with high spatial–temporal resolutions. It demonstrates that...

2018年10月1日 · We investigated the electrochemical stability of Au TEM grid coated with a carbon supporting film for ILTEM study after holding at different potentials (1.0–1.8 V/RHE) in both acid and alkaline electrolytes. The breakage of the carbon supporting film on the Au TEM grid increased with the increase of electrode potential and the holding time.

2017年11月27日 · Using LC-TEM, the effect of the electron dose rate, solute concentration, experiment conditions including the operation mode (TEM vs STEM), and the liquid cell setup (static or flow mode) on the growth mechanism and the ultimate morphology of Au NPs was systematically studied in HAuCl 4 aqueous solutions, providing a global picture to ...

2006年9月30日 · The structure changes of Au nanoparticles supported on CeO 2 were observed by using an analytical transmission electron microscope (TEM). The rapid shape change of a Au particle was observed during TEM observation, such as shrinking layer by layer down to a mono-atomic layer on the CeO 2 substrate with no large change of a contact diameter.

2022年4月20日 · 基于国内外顶级科研单位和仪器公司的商业资源，以及数千名科技顾问，为全球科研人员提供包括同步辐射（xas、xrd、saxs，高能+中低能）、球差电镜、fib-tem；原位红外、原位xps、原位xrd、原位raman等在内的各种仪器测试、数据解析和计算模拟服务。

2018年11月6日 · Now, completely different sintering behaviors of Au nanoparticles on distinct anatase TiO 2 surfaces have been determined by in situ TEM. The full in situ sintering processes of Au nanoparticles were visualized on TiO 2 (101) surface, which coupled the Ostwald

2008年1月14日 · The Au nano-particles are deposited on the metal oxide substrate, TiO2 and CeO2, and the structure of the Au particles and Au-metal oxide interface was observed by TEM and HAADF-STEM. It was found that the growth of Au particles on TiO2 and CeO2 by heating treatment is suppressed in the reductive atmosphere.

1994年1月1日 · 摘要 通过透射电子显微镜(tem)和俄歇电子能谱(aes)研究了沉积在云母上的贵金属(au、pt和pd)薄膜的结构和化学特性。逐层 aes 分析揭示了薄膜表面被硫污染，并且随着距表面的距离越远，薄膜内部的碳含量越低。