Cited 1 time in webofscience Cited 1 time in scopus

Ultrahigh photosensitivity of the polar surfaces of single crystalline ZnO nanoplates

Title
Ultrahigh photosensitivity of the polar surfaces of single crystalline ZnO nanoplates
Authors
Noh, Hyun WooJeong, Soon MoonCho, Jung HyunHong, Jung Il
DGIST Authors
Jeong, Soon MoonHong, Jung Il
Issue Date
2018-04
Citation
Nanoscale, 10(15), 6801-6805
Type
Article
Article Type
Article
ISSN
2040-3364
Abstract
Single crystalline ZnO nanoplatelet structures were synthesized via a hydrothermal process on the surface of GaN microparticles. Growth of ZnO seeded on the GaN surface promoted faster growth along the directions within the basal plane of the ZnO crystal structure, resulting in the formation of 2-dimensional nanoplates with a thickness less than a few tens of nanometers at most. Electrical conduction across an individual nanoplate was measured and found to be extremely sensitive to UV illumination and the surrounding atmospheric environment. Such electrical behaviors of the nanoplates were attributed to the dominance of the polar (0001) surfaces and the adsorption and desorption of the ambient gas molecules on these surfaces. Their coupling with conduction electrons near the surface is the critical factor responsible for the highly sensitive electrical properties of the nanoplate. Virtually the entire volume of the nanoplates is under the influence of the surface adsorbed molecules, which changes the electrical properties of the nanoplates extensively, depending on their environmental conditions. Combining the very high photocurrent to dark current ratio and the high effective resistance of the ZnO nanoplates reported in the present study, ultrasensitive photo-devices operating at very low power can be expected with the use of 2-dimensional nanoplates. © The Royal Society of Chemistry.
URI
http://hdl.handle.net/20.500.11750/6396
DOI
10.1039/c8nr00569a
Publisher
Royal Society of Chemistry
Related Researcher
  • Author Hong, Jung-Il Quantum Electric & Magnetic Materials Laboratory
  • Research Interests Electric and Magnetic Properties of Nanostructured Materials; Spintronics
Files:
There are no files associated with this item.
Collection:
Smart Textile Convergence Research Group1. Journal Articles
Department of Emerging Materials ScienceQuantum Electric & Magnetic Materials Laboratory1. Journal Articles


qrcode mendeley

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

BROWSE