Document Detail


Extraordinary room-temperature photoluminescence in WS2 triangular monolayers.
MedLine Citation:
PMID:  23194096     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Individual monolayers of metal dichalcogenides are atomically thin two-dimensional crystals with attractive physical properties different from those of their bulk counterparts. Here we describe the direct synthesis of WS2 monolayers with triangular morphologies and strong room-temperature photoluminescence (PL). The Raman response as well as the luminescence as a function of the number of S-W-S layers is also reported. The PL weakens with increasing number of layers due to a transition from direct band gap in a monolayer to indirect gap in multilayers. The edges of WS2 monolayers exhibit PL signals with extraordinary intensity, around 25 times stronger than that at the platelet's center. The structure and chemical composition of the platelet edges appear to be critical for PL enhancement.
Authors:
Humberto R Gutierrez; Nestor Perea-Lopez; Ana Laura Elias; Ayse Berkdemir; Bei Wang; Ruitao Lv; Florentino Lopez-Urias; Vincent H Crespi; Humberto Terrones; Mauricio Terrones
Related Documents :
12240446 - Dynamic equilibration of eta 1-carbene and eta 2-alkyne moieties within an alkynylcarbe...
10747416 - Metal telluride clusters composed of niobocene carbonyl, telluride, and cobalt carbonyl...
24089216 - Helicity discrimination in n,n'-dibenzoyl-1,2,3,4,7,8,9,10-octahydro-1,10-phenanthrolin...
24574906 - Facile and promising method for michael addition of indole and pyrrole to electron-defi...
18352306 - Extended one-dimensional supramolecular assembly on a stepped surface.
23517106 - Cationic pd(ii)-catalyzed reductive cyclization of alkyne-tethered ketones or aldehydes...
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-29
Journal Detail:
Title:  Nano letters     Volume:  -     ISSN:  1530-6992     ISO Abbreviation:  Nano Lett.     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-30     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101088070     Medline TA:  Nano Lett     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Effectiveness of GnRH antagonist in the treatment of patients with polycystic ovary syndrome undergo...
Next Document:  Fertilizer use and self-reported respiratory and dermal symptoms among tree planters.