DNA Immobilization on GaP(100) Investigated by Kelvin Probe Force Microscopy
被引:9
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作者:
Richards, David N.
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Purdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USAPurdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USA
Richards, David N.
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Zemlyanov, Dmitry Y.
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Purdue Univ, Birck Nanotechnol Ctr, W Lafayette, IN 47907 USAPurdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USA
Zemlyanov, Dmitry Y.
[2
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Asrar, Rafay M.
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Purdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USAPurdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USA
Asrar, Rafay M.
[1
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Chokshi, Yena Y.
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Purdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USAPurdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USA
Chokshi, Yena Y.
[1
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Cook, Emily M.
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Purdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USAPurdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USA
Cook, Emily M.
[1
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Hinton, Thomas J.
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Purdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USAPurdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USA
Hinton, Thomas J.
[1
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Lu, Xinran
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Purdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USAPurdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USA
Lu, Xinran
[1
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Nguyen, Viet Q.
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Purdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USAPurdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USA
Nguyen, Viet Q.
[1
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Patel, Neil K.
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Purdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USAPurdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USA
Patel, Neil K.
[1
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Usher, Jonathan R.
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Purdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USAPurdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USA
Usher, Jonathan R.
[1
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Vaidyanathan, Sriram
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Purdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USAPurdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USA
Vaidyanathan, Sriram
[1
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Yeung, David A.
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Purdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USAPurdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USA
Yeung, David A.
[1
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Ivanisevic, Albena
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Purdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USA
Purdue Univ, Dept Chem, W Lafayette, IN 47907 USAPurdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USA
Ivanisevic, Albena
[1
,3
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机构:
[1] Purdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USA
[2] Purdue Univ, Birck Nanotechnol Ctr, W Lafayette, IN 47907 USA
[3] Purdue Univ, Dept Chem, W Lafayette, IN 47907 USA
Understanding changes in the properties of semiconductor materials after immobilization of biomolecules on the surface is essential for the fabrication of well-tuned and programmable devices. The work examines changes in the properties of gallium phosphide (GaP) after modification with an organic linker, a single stranded DNA, and its complementary strand. We investigated changes in surface potential with Kelvin probe force microscopy (KPFM). Analysis revealed that a more ordered adlayer of ssDNA was present when a lower concentration of linker molecule was used. KPFM data combined with coverage data obtained from X-ray photoelectron spectroscopy (XPS) further confirmed this result. Successful hybridization with the complementary strand was confirmed by both KPFM and Raman spectroscopy. The results indicate that one can control the amount of DNA on the surface by changing the initial concentration of the organic linker, and thus modulate the surface potential of the semiconductor material.
机构:
Kobe Univ, Dept Chem, Fac Sci, Kobe, Hyogo 6578501, Japan
Univ London Univ Coll, Dept Chem, 20 Gordon St, London WC1H 0AJ, England
London Ctr Nanotechnol, London WC1H 0AJ, EnglandKobe Univ, Dept Chem, Fac Sci, Kobe, Hyogo 6578501, Japan
Pang, Chi Lun
Sasahara, Akira
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机构:
Kobe Univ, Dept Chem, Fac Sci, Kobe, Hyogo 6578501, Japan
Japan Sci & Technol Agcy, CREST, Kawaguchi, Saitama 3320012, Japan
Japan Adv Inst Sci & Technol, Nomi, Ishikawa 9231292, JapanKobe Univ, Dept Chem, Fac Sci, Kobe, Hyogo 6578501, Japan
Sasahara, Akira
Onishi, Hiroshi
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机构:
Univ London Univ Coll, Dept Chem, 20 Gordon St, London WC1H 0AJ, England
London Ctr Nanotechnol, London WC1H 0AJ, EnglandKobe Univ, Dept Chem, Fac Sci, Kobe, Hyogo 6578501, Japan