Replacement of Poly(vinyl pyrrolidone) by Thiols: A Systematic Study of Ag Nanocube Functionalization by Surface-Enhanced Raman Scattering.

The Journal of Physical Chemistry. C, Nanomaterials and Interfaces
Christine H MoranYounan Xia

Abstract

In this work, we used surface-enhanced Raman scattering (SERS) to monitor the replacement of poly(vinyl pyrrolidone) (PVP) on Ag nanocubes by cysteamine, thiol-terminated PEG, and benzenedithiol. PVP is widely used as a colloidal stabilizer and capping agent to control the shape of Ag (as well as many other noble metals) nanocrystals during synthesis, and to stabilize the final colloidal suspension. However, the surface chemistry of Ag nanocrystals often needs to be tailored for specific applications, so the PVP coating must be removed and/or replaced by other ligands. By monitoring the signature peak from the carbonyl groups of PVP, we show, for the first time, that the PVP adsorbed on the surface of Ag nanocubes was completely replaced by the thiol molecules at room temperature over the course of a few hours. We observed the same trend no matter if the Ag nanocubes were suspended in an aqueous solution of the thiol or supported on a silicon substrate and then immersed in the thiol solution.

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Citations

Dec 31, 2011·Journal of the American Chemical Society·Xiaohu XiaYounan Xia
Aug 10, 2013·The Analyst·Farkhondeh Fathi, Heinz-Bernhard Kraatz
Aug 11, 2015·Journal of Environmental Sciences (China)·Yongguang YinGuibin Jiang
Apr 15, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·Kathryn A JohnstonJill E Millstone
Jan 10, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Shu Fen TanChristian A Nijhuis
Jan 14, 2017·The Journal of Physical Chemistry. B·Emma Jorgenson, Anatoli Ianoul
Oct 6, 2015·Dalton Transactions : an International Journal of Inorganic Chemistry·Kallum M KoczkurSara E Skrabalak
Dec 25, 2013·Physical Chemistry Chemical Physics : PCCP·Jordan F BetzGary W Rubloff
Dec 21, 2017·Beilstein Journal of Nanotechnology·Ioannis Kanelidis, Tobias Kraus
Oct 30, 2012·The Journal of Physical Chemistry. C, Nanomaterials and Interfaces·Xiaohu XiaYounan Xia
Sep 14, 2017·Chemical Reviews·Shuaidi ZhangVladimir V Tsukruk
Aug 23, 2019·Journal of the American Chemical Society·Yang ZhaoGalen D Stucky
Jan 19, 2019·Journal of the American Chemical Society·Zhifeng ChenRobert M Rioux
Mar 25, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Shuaidi ZhangVladimir V Tsukruk
Oct 21, 2014·Analytical Chemistry·Haley L MarksGerard L Coté
Oct 6, 2021·Nature Nanotechnology·Eitan OksenbergErik C Garnett

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