Journal
NANO LETTERS
Volume 13, Issue 2, Pages 409-415Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl303568d
Keywords
Nanowires; ultrathin sheet; coalescence; activation energy; DFT calculations; transport
Categories
Funding
- DST, India [SR/S5/NM-47/2005, SR/NM/NS-49/2009, INT/EC/MONAMI (25/233513)/2008]
- Israel Science Foundation [340/2010]
- US-Israel Binational Science Foundation [2006032]
- Direct For Mathematical & Physical Scien [0843934] Funding Source: National Science Foundation
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [1059108] Funding Source: National Science Foundation
- Division Of Materials Research [0843934] Funding Source: National Science Foundation
Ask authors/readers for more resources
Two-dimensional (2D) sheets are currently in the spotlight of nanotechnology owing to high-performance device fabrication possibilities. Building a free-standing quantum sheet with controlled morphology is challenging when large planar geometry and ultranarrow thickness are simultaneously concerned. Coalescence of nanowires into large single-crystalline sheet is a promising approach leading to large, molecularly thick 2D sheets with controlled planar morphology. Here we report on a bottom-up approach to fabricate high-quality ultrathin 2D single crystalline sheets with well-defined rectangular morphology via collective coalescence of PbS nanowires. The ultrathin sheets are strictly rectangular with 1.8 nm thickness, 200-250 nm width, and 3-20 mu m length. The sheets show high electrical conductivity at room and cryogenic temperatures upon device fabrication. Density functional theory (DFT) calculations reveal that a single row of delocalized orbitals of a nanowire is gradually converted into several parallel conduction channels upon sheet formation, which enable superior in-plane carrier conduction.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available