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Volumn 6, Issue 5, 2006, Pages 911-915

Tunable single-walled carbon nanotube microstructure in the liquid and solid states using poly(acrylic acid)

Author keywords

[No Author keywords available]

Indexed keywords

AQUEOUS MIXTURES; POLY(ACRYLIC ACID); WATERLIKE VISCOSITY; WELL-EXFOLIATED STATES;

EID: 33744809034     PISSN: 15306984     EISSN: None     Source Type: Journal    
DOI: 10.1021/nl052486t     Document Type: Article
Times cited : (157)

References (50)
  • 26
    • 33744826777 scopus 로고    scopus 로고
    • note
    • This schematic does not suggest that the nanotube-filled suspension changes between stable and unstable dispersion, but rather the level of interaction between PAA and SWNT is altered by changes in pH. Under all conditions the suspensions have a homogeneous, inklike appearance for short time periods (on the order of hours), but the higher pH suspensions are more exfoliated and structured (as evidenced by increasing viscosity shown in Figure 2). Over longer time periods (on the order of days), the low-pH suspensions remain homogeneous and the high-pH suspensions actually begin to exhibit macroscopic aggregation.
  • 27
    • 33744820782 scopus 로고    scopus 로고
    • note
    • The SWNTs used here were provided by Carbon Nanotechnologies (Houston, TX) and contained 27 wt% residual iron impurity.
  • 28
    • 33744815189 scopus 로고    scopus 로고
    • note
    • Sonication was performed for 20 min using a VirTis Virsonic 100 Ultrasonic Cell Disrupter (SP Industries, Warminster, PA). All sonication was performed with 50 W for 10 min followed by pH adjustment and an additional 10 min thereafter to achieve a homogenous suspension. The concentration of nanotubes was chosen to achieve 10 wt% by weight of the poly(acrylic acid) in solution.
  • 29
    • 33744830280 scopus 로고    scopus 로고
    • note
    • Suspension viscosities were measured at room temperature using a Wells-Brookfield Cone/Plate LVDV-III Viscometer (Brookfield, Middleboro, MA).
  • 34
    • 33744810841 scopus 로고    scopus 로고
    • note
    • Scanning electron microscopy was performed with a Zeiss 1530 VP FE-SEM (Carl Zeiss, Inc., Thornwood, NY).
  • 38
    • 33744802593 scopus 로고    scopus 로고
    • note
    • Sheet resistance of the SWNT-filled PAA composites was measured with a home-built four-point probe apparatus. This system includes an Agilent E3644A DC power supply (Agilent Technologies, Inc., Englewood, CO), Keithley Model 2000 Digital Multimeter (Keithley Instruments, Inc., Cleveland, OH), and an SP4-62180TRS four-point probe head (Lucas Labs, Gilroy, CA).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.