Novel carbon nanosheets as support for ultrahigh-resolution structural analysis of nanoparticles

被引：49

作者：

Nottbohm, Christoph T. ^{[1
]}

Beyer, Andre ^{[1
]}

Sologubenko, Alla S. ^{[2
,3
]}

Ennen, Inga ^{[1
]}

Huetten, Andreas ^{[1
]}

Roesner, Harald ^{[4
]}

Eck, Wolfgang ^{[5
]}

Mayer, Joachim ^{[2
,3
]}

Goelzhaeuser, Armin ^{[1
]}

机构：

[1] Univ Bielefeld, Fac Phys, D-33501 Bielefeld, Germany

[2] Rhein Westfal TH Aachen, Gemeinschaftstabor Elekt Mikroskopie, D-52074 Aachen, Germany

[3] Res Ctr Julich, Ernst Ruska Ctr Microscopy & Spectroscopy Elect, D-52425 Julich, Germany

[4] Forschungszentrum Karlsruhe, Inst Nanotechnol, D-76021 Karlsruhe, Germany

[5] Jackson Lab, Inst Mol Biophys, Bar Harbor, ME 04609 USA

来源：

ULTRAMICROSCOPY | 2008年 / 108卷 / 09期

关键词：

self-assembled monolayer; ultrathin carbon film; transmission electron microscopy; scanning transmission electron microscopy; nanoparticles;

D O I：

10.1016/j.ultramic.2008.02.008

中图分类号：

TH742 [显微镜];

学科分类号：

摘要：

The resolution in transmission electron microscopy (TEM) has reached values as low as 0.08 nm. However, these values are not accessible for very small objects in the size range of a few nanometers or lower, as they have to be placed on some support, which contributes to the overall electron-scattering signal, thereby blurring the contrast. Here, we report on the use of nanosheets made from cross-linked aromatic self-assembled monolayers as TEM sample supports. When transferred onto a copper grid. a single 1.6-nm-thick nanosheet can cover the grid and is free standing within the micron-sized openings. Despite its thinness, the sheet is stable under the impact of the electron beam. Micrographs taken from nanoclusters onto these nanosheets show highly increased contrast in comparison to the images taken from amorphous carbon supports. In scanning transmission electron microscopy with nanosheet support, a size analysis of sub-nanometer Au clusters was performed and single At, atoms were resolved. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：885 / 892

页数：8

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