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Volumn 21, Issue 14, 2005, Pages 6596-6602

Investigations into the mechanism of adsorption of carbon nanotubes onto aminopropylsiloxane functionalized surfaces

Author keywords

[No Author keywords available]

Indexed keywords

AMINOPROPYLSILOXANE (APX) MONOLAYERS; DEPOSITION TIME; ELECTROSTATIC INTERACTIONS; SURFACE COVERAGE;

EID: 22444447152     PISSN: 07437463     EISSN: None     Source Type: Journal    
DOI: 10.1021/la050540f     Document Type: Article
Times cited : (14)

References (28)
  • 10
    • 22444445392 scopus 로고    scopus 로고
    • note
    • Molecular mechanics calculations were performed using standard MM2 force fields and VDW radii (Chem 3D Ultra software). The thickness of APS films on silicon oxide was estimated from measurements of the energy minimized structure of APTES with fully extended, staggered alkyl chains. The thickness of APS chemically bound to the surface was taken as the center to center distance from the farthest oxygen atom to the outermost hydrogen of the amine projected onto the long axis of the molecule, less the VDW radii of oxygen, plus the VDW radii of hydrogen. The thickness of the noncovalently bound APS was taken as the center to center distance calculated for the chemically bound case plus the VDW radii of hydrogen and oxygen. Calculations were performed at torsional angles of the amine that resulted in the shortest and longest distances upon projection of an amine hydrogen onto the long molecular axis, Complete hydrolysis of the ethoxy groups was assumed in both cases. In addition, a monolayer of water was assumed to be present before and after APS formation, resulting in no net change in the measured thickness.
  • 15
    • 0345979435 scopus 로고    scopus 로고
    • Ulman, A. Chem. Rev. 1996, 96, 1533-1554.
    • (1996) Chem. Rev. , vol.96 , pp. 1533-1554
    • Ulman, A.1
  • 16
    • 22444439225 scopus 로고    scopus 로고
    • note
    • The oxidatively purified, single walled CNTs used in this study were purchased from Carbon Nanotechnologies, Inc. with a reported purity of ∼90%. The CNTs were suspended in 1% (w/w) aqueous Triton X-100 by sonicating at 60 Hz in a water bath for 18-24 h. The resulting suspensions were then further purified by 3× centrifugation at 20 K rcf for 30 min, followed by decantation of the CNTs remaining in suspension. After centrifugation, the level of particulate contamination was dramatically reduced as evidenced by AFM and transmission electron microscopy; however, some amorphous material, particulates, and catalyst remained.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.