Room-Temperature Electron Transport in Self-Assembled Sheets of PbSe Nanocrystals with a Honeycomb Nanogeometry.
Journal
The journal of physical chemistry. C, Nanomaterials and interfaces
ISSN: 1932-7447
Titre abrégé: J Phys Chem C Nanomater Interfaces
Pays: United States
ID NLM: 101299949
Informations de publication
Date de publication:
06 Jun 2019
06 Jun 2019
Historique:
received:
15
04
2019
entrez:
18
6
2019
pubmed:
18
6
2019
medline:
18
6
2019
Statut:
ppublish
Résumé
It has been shown recently that atomically coherent superstructures of a nanocrystal monolayer in thickness can be prepared by self-assembly of monodisperse PbSe nanocrystals, followed by oriented attachment. Superstructures with a honeycomb nanogeometry are of special interest, as theory has shown that they are regular 2-D semiconductors, but with the highest valence and lowest conduction bands being Dirac-type, that is, with a linear energy-momentum relation around the K-points in the zone. Experimental validation will require cryogenic measurements on single sheets of these nanocrystal monolayer superstructures. Here, we show that we can incorporate these fragile superstructures into a transistor device with electrolyte gating, control the electron density, and measure the electron transport characteristics at room temperature. The electron mobility is 1.5 ± 0.5 cm
Identifiants
pubmed: 31205579
doi: 10.1021/acs.jpcc.9b03549
pmc: PMC6559210
doi:
Types de publication
Journal Article
Langues
eng
Pagination
14058-14066Déclaration de conflit d'intérêts
The authors declare no competing financial interest.
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