Bioelectrochemical single-walled carbon nanotubes

Journal of the American Chemical Society

Volumn 124, Issue 43, 2002, Pages 12664-12665

  Azamian, Bobak R ^a   Davis, Jason J ^a   Coleman, Karl S ^a   Bagshaw, Claire B ^a   Green, Malcolm L H ^a  

^a UNIVERSITY OF OXFORD   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

CARBOXYLIC ACID; ENZYME; METALLOPROTEIN;

ADSORPTION; ARTICLE; BIOSENSOR; ELECTRICITY; ELECTROCHEMISTRY; NANOTECHNOLOGY; SEMICONDUCTOR;

EID: 0037202184     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja0272989     Document Type: Article

References (16)

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2. (b) Star, A.; Stoddart, J. F.; Steuerman, D.; Diehl, M.; Boukai, A.; Wong, E. W.; Yang, X.; Chung, S.; Choi, H.; Heath, J. R. Angew. Chem. 2001, 40, 1721-1725.
3. Azamian, B. R.; Coleman, K. S.; Davis, J. J.; Hanson, N.; Green, M. L. H. J. Chem. Soc., Chem. Commun. 2002, 366-367.
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8. HiPco SWNTs (purchased from Carbon Nanotechnologies Inc., U.S.A.) were oxidized by refluxing in 3 M nitric acid at 120 °C for 13.5 h. Purity, as verified by TEM, Raman, and AFM, was high. These nanotubes could form, on sonication, stable suspensions in HPLC-grade deionized water (up to 0.1 mg/mL).
9. A typical solution-phase protein-immobilization procedure: to a dispersion (0.03 mg/mL) of oxidized SWNTs in pure water was added a dilute solution of protein (50-100 μg/mL). The suspension was left to stand (2-20 h); then tubes were then washed thoroughly on a 0.4 μm polycarbonate membrane with HPLC-grade water, dispersed in water, and spin-coated onto oxidized silicon wafer for analysis.
10. SWNTs were spin-coated onto oxidized silicon wafer, and the surface was then exposed to 1-100 μg/mL solutions of protein in potassium phosphate buffer for 1-3 h and then washed with HPLC grade water. Nanotubes were imaged before and after exposure to protein, using manually etched surface relocation markers.
11. Harrison, P. M.; Arosio, P. Biochim. Biophys. Acta 1996, 1275, 161-203.
12. -2 mbar for 2 h, after which 6 mg of material remained; 0.1 mass % SDS was used to suspend these SWNTs during and after protein exposure.
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14. Britto, P. J.; Santhanum, K. S. V.; Rubio, A.; Alonso, J. A.; Ajayan, P. M. Adv. Mater. 1999, 11(2), 154-157.
15. 3 refluxed SWNTs in deionized water were drop-dried onto freshly polished edge-plane graphite (EPG) or glassy carbon (GC) electrodes.
16. Cass, A. E. G.; Davis, G.; Francis, G. D.; Hill, H. A. O.; Aston, W. J.; Higgins. I. J.; Plotkin, E. V.; Scott, D. L.; Turner, A. P. F. Anal. Chem. 1984, 56, 667-671.