Issue 45, 2018

Colloidal lead iodide nanorings

Abstract

Colloidal chemistry of nanomaterials experienced a tremendous development in the last decades. In the course of the journey 0D nanoparticles, 1D nanowires, and 2D nanosheets have been synthesized. They have in common to possess a simple topology. We present a colloidal synthesis strategy for lead iodide nanorings, with a non-trivial topology. First, two-dimensional structures were synthesized in nonanoic acid as the sole solvent. Subsequently, they underwent an etching process in the presence of trioctylphosphine, which determines the size of the hole in the ring structure. We propose a mechanism for the formation of lead iodide nanosheets which also explains the etching of the two-dimensional structures starting from the inside, leading to nanorings. In addition, we demonstrate a possible application of the as-prepared nanorings in photodetectors. These devices are characterized by a fast response, high gain values, and a linear relation between photocurrent and incident light power intensity over a large range. The synthesis approach allows for inexpensive large-scale production of nanorings with tunable properties.

Graphical abstract: Colloidal lead iodide nanorings

Supplementary files

Article information

Article type
Paper
Submitted
09 Aug 2018
Accepted
02 Nov 2018
First published
12 Nov 2018
This article is Open Access
Creative Commons BY license

Nanoscale, 2018,10, 21197-21208

Colloidal lead iodide nanorings

E. Klein, L. Heymann, A. B. Hungria, R. Lesyuk and C. Klinke, Nanoscale, 2018, 10, 21197 DOI: 10.1039/C8NR06430J

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