Document Detail

Electrostatic Dimension of Aligned Array Carbon Nanotube Field Effect Transistors.
MedLine Citation:
PMID:  23320505     Owner:  NLM     Status:  Publisher    
Accurate electrostatics modeling of the nanotubes (NT)/nanowires (NW) has significant implications for the ultimate scalability of aligned-array NT/NW-FET. The analysis to date has focused on limits of capacitive coupling between the 1D channel and 2D gate that is strictly relevant only in the linear response operation of NT/NW-FET. Moreover, the techniques of electrostatic doping by independent gates that cover only part of the channel are widely used, but the nature of its electrostatic coupling has not been explored. In this paper, we use a three-dimensional, self-consistent model for NT/NW-FET to interpret the essence of electrostatic coupling with complex configuration of electrode geometries. The interplay between 3D electric fields and its 1D termination onto the NTs/NWs suggests surprising complexity of electrostatic interaction not captured in simpler models. This coupling can change the performance metrics such as ON and OFF currents by orders of magnitude depending on (1) NT/NW density, (2) bias-voltage and (3) gate overlap length. Remarkably, this parasitic coupling persists regardless the gate oxide thickness, changes in dielectric constant, and/or the width of the diameter distribution of NTs/NWs. The predictions of the model are systematically validated by a series of experiments.
Muhammad A Wahab; Sung Hun Jin; Ahmad E Islam; Jaeseong Kim; Jihun Kim; Woon-Hong Yeo; Dong Joon Lee; Ha Uk Chung; John A Rogers; Muhammed A Alam
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-16
Journal Detail:
Title:  ACS nano     Volume:  -     ISSN:  1936-086X     ISO Abbreviation:  ACS Nano     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-16     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101313589     Medline TA:  ACS Nano     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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