Size-controlled electrochemical growth of PbS nanostructures into electrochemically patterned self-assembled monolayers

Langmuir : the ACS Journal of Surfaces and Colloids
Fatma Bayrakçeken Nişancı, Umit Demir

Abstract

1-Hexadecanethiol self-assembled monolayers (HDT SAMs) on Au(111) were used as a molecular resist to fabricate nanosized patterns by electrochemical reductive partial desorption for subsequent electrodeposition of PbS from the same solution simultaneously. The influences of potential steps of variable pulse width and amplitude on the size and the number of patterns were investigated. The kinetics of pattern formation by reductive desorption appears to be instantaneous according to chronoamperometric and morphological investigations. PbS structures were deposited electrochemically into the patterns on HDT SAMs by a combined electrochemical technique, based on the codeposition from the same saturated PbS solution at the underpotential deposition of Pb and S. Scanning tunneling microscopy measurements showed that all of the PbS deposits were disk shaped and uniformly distributed on Au(111) surfaces. Preliminary results indicated that the diameter and the density of PbS deposits can be controlled by controlling the pulse width and amplitude of potential applied at the reductive removal stage of HDT SAMs and the deposition time during the electrochemical deposition step.

References

Sep 13, 2000·Nature·T Ito, S Okazaki
Jul 18, 2001·Journal of the American Chemical Society·Y LiJ Liu
Feb 19, 2002·Chemical Reviews·G. M. Wallraff, W. D. Hinsberg
Nov 13, 2003·Chemical Reviews·Stephan KrämerChristopher B Gorman
Apr 14, 2005·Chemical Reviews·Byron D GatesGeorge M Whitesides
Apr 19, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Tuba OznülüerUmit Demir
Dec 10, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Chaokang GuCurtis Shannon

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Citations

Sep 27, 2013·ACS Applied Materials & Interfaces·Huaibin ShenLin Song Li
Apr 11, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Cemile KartalÜmit Demir

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