PMID- 28758721
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20180727
LR  - 20180727
IS  - 1944-8252 (Electronic)
IS  - 1944-8244 (Linking)
VI  - 9
IP  - 34
DP  - 2017 Aug 30
TI  - Polymer-Free Electronic-Grade Aligned Semiconducting Carbon Nanotube Array.
PG  - 28859-28867
LID - 10.1021/acsami.7b06850 [doi]
AB  - Conjugated polymers are used commonly to selectively sort semiconducting carbon 
      nanotubes (S-CNTs) from their metallic counterparts in organic solvents. The 
      polymer-wrapped S-CNTs can be easily processed from organic solvents into arrays 
      of CNTs for scalable device fabrication. Though the conjugated polymers are 
      essential for sorting and device fabrication, it is highly desirable to remove 
      them completely as they limit the electronic properties of the device. Here, we 
      use a commercially available polymer, namely, 
      poly[(9,9-dioctylfluorenyl-2,7-diyl)-alt-co-(6,6'-(2,2'-bipyridine))] (PFO-BPy), 
      to sort large-diameter S-CNTs with ultrahigh selectivity and fabricate 
      CNT-array-based field effect transistors (FETs) via a floating evaporative 
      self-assembly (FESA) process. We report quantitative removal of the polymer 
      wrapper from the FESA aligned S-CNT arrays using a metal-chelation-assisted 
      polymer removal (McAPR) process. The implementation of this process on FESA films 
      requires the selective thermal degradation of the polymer into oligomers, 
      combined with optimization of the solvent type and temperature of the metal 
      complexation reaction. Resulting S-CNT array FET devices show that the electronic 
      properties of pristine CNT are preserved through this process. Optical 
      microscopy, UV-vis spectroscopy, and X-ray photoelectron spectroscopy (XPS) were 
      used to characterize the quantitative polymer removal. We quantitatively describe 
      the FET devices to analyze the fundamental characteristics of FETs (mobility (mu), 
      on-conductance (G(on)), and contact resistance (2R(c))) by comparing before and 
      after polymer removal. The ability to completely remove the polymer wrapper in 
      aligned CNT arrays without adversely affecting the device properties opens up 
      applications beyond FETs into photovoltaics and biosensing.
FAU - Joo, Yongho
AU  - Joo Y
AD  - Department of Materials Science and Engineering, University of Wisconsin-Madison 
      , Madison, Wisconsin 53706, United States.
FAU - Brady, Gerald J
AU  - Brady GJ
AD  - Department of Materials Science and Engineering, University of Wisconsin-Madison 
      , Madison, Wisconsin 53706, United States.
FAU - Kanimozhi, Catherine
AU  - Kanimozhi C
AD  - Department of Materials Science and Engineering, University of Wisconsin-Madison 
      , Madison, Wisconsin 53706, United States.
FAU - Ko, Jaehyoung
AU  - Ko J
AD  - Department of Materials Science and Engineering, University of Wisconsin-Madison 
      , Madison, Wisconsin 53706, United States.
FAU - Shea, Matthew J
AU  - Shea MJ
AD  - Department of Materials Science and Engineering, University of Wisconsin-Madison 
      , Madison, Wisconsin 53706, United States.
FAU - Strand, Michael T
AU  - Strand MT
AD  - Department of Materials Science and Engineering, University of Wisconsin-Madison 
      , Madison, Wisconsin 53706, United States.
FAU - Arnold, Michael S
AU  - Arnold MS
AUID- ORCID: 0000-0002-2946-5480
AD  - Department of Materials Science and Engineering, University of Wisconsin-Madison 
      , Madison, Wisconsin 53706, United States.
FAU - Gopalan, Padma
AU  - Gopalan P
AUID- ORCID: 0000-0002-1955-640X
AD  - Department of Materials Science and Engineering, University of Wisconsin-Madison 
      , Madison, Wisconsin 53706, United States.
LA  - eng
PT  - Journal Article
DEP - 20170816
PL  - United States
TA  - ACS Appl Mater Interfaces
JT  - ACS applied materials & interfaces
JID - 101504991
OTO - NOTNLM
OT  - FET
OT  - aligned CNT array
OT  - metal complexation
OT  - polymer removal
OT  - single-walled carbon nanotubes
EDAT- 2017/08/02 06:00
MHDA- 2017/08/02 06:01
CRDT- 2017/08/01 06:00
PHST- 2017/08/02 06:00 [pubmed]
PHST- 2017/08/02 06:01 [medline]
PHST- 2017/08/01 06:00 [entrez]
AID - 10.1021/acsami.7b06850 [doi]
PST - ppublish
SO  - ACS Appl Mater Interfaces. 2017 Aug 30;9(34):28859-28867. doi: 
      10.1021/acsami.7b06850. Epub 2017 Aug 16.