BROWSE

Related Scientist

Researcher

Hima Nagamanasa Kandula
첨단연성물질 연구단
more info

Liquid-Cell Electron Microscopy of Adsorbed Polymers

Cited 1 time in webofscience Cited 0 time in scopus
118 Viewed 2 Downloaded
Title
Liquid-Cell Electron Microscopy of Adsorbed Polymers
Author(s)
Kandula Hima Nagamanasa; Huan Wang; Steve Granick
Publication Date
2017-11
Journal
ADVANCED MATERIALS, v.29, no.41, pp.1703555 -
Publisher
WILEY-V C H VERLAG GMBH
Abstract
Individual macromolecules of polystyrene sulfonate and poly(ethylene oxide) are visualized with nanometer resolution using transmission electron microscopy (TEM) imaging of aqueous solutions with and without added salt, trapped in liquid pockets between creased graphene sheets. Successful imaging with 0.3 s per frame is enabled by the sluggish mobility of the adsorbed molecules. This study finds, validating others, that an advantage of this graphene liquid-cell approach is apparently to retard sample degradation from incident electrons, in addition to minimizing background scattering because graphene windows are atomically thin. Its new application here to polymers devoid of metal-ion labeling allows the projected sizes and conformational fluctuations of adsorbed molecules and adsorption-desorption events to be analyzed. Confirming the identification of the observed objects, this study reports statistical analysis of datasets of hundreds of images for times up to 100 s, with variation of the chemical makeup of the polymer, the molecular weight of the polymer, and the salt concentration. This observation of discrete polymer molecules in solution environment may be useful generally, as the findings are obtained using an ordinary TEM microscope, whose kind is available to many researchers routinely. © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
URI
https://pr.ibs.re.kr/handle/8788114/4192
ISSN
0935-9648
Appears in Collections:
Center for Soft and Living Matter(첨단연성물질 연구단) > Journal Papers (저널논문)
Files in This Item:
Steve_Liquid-Cell Electron Microscopy of Adsorbed Polymers.pdfDownload

qrcode

  • facebook

    twitter

  • Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse