Size-Controlled Electrochemical Growth of PbS Nanostructures into Electrochemically Patterned Self-Assembled Monolayers

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.

Sulfide‐Inhibiting Growth of Lead Sulfide Rods Array Film from Micron to Nano for NIR Photodetector

“…However, many challenges are associating with the synthesis of high‐quality vertical structure of PbS nanorod in using ECALE deposition method. [ 18 ] For example, the growth of IV–VI nanofilms follows the 2D layer‐by‐layer growth kinetics at the beginning of electrodeposition, and the 3D growth dominates after the several original layers are formed, [ 12 ] it is easy to obtain the bulk or microsize film. There are almost no reports on PbS nanorod array controllable growth mechanism from micro‐ to nanometer.…”

Layer-by-layer growth of molecular self-assembled monolayers /sputtered gold thin films/graphene oxide on glass substrate

“…Hybrid nanostructures [1] have been paid attention due to their great potential applications in photocatalysis [2], biosensor production [3], magnetic materials [4][5][6][7][8][9] and super-hydrophobic materials [10]. These functional devices are continuously being developed by using advanced materials, they can be applied to high-tech applications [11]. With the use of SPM-based lithography [12][13][14][15] photolithographic techniques [16], molecular resist which is composed of a combination of sputter deposition and patterned monolayers has been used in a number of nanofabrication processes [17].…”

Electrodeposition process for the fabrication of copper dendrites film with stable superhydrophobicity

“…On the other hand, electrochemical deposition has been demonstrated to be a feasible alternative strategy for fabrication of metals in micro or nanoscale [10,11] . Several electrochemical methods were also employed in the preparation of dendrites [12−14] .…”