S Rath et al 2008 Nanotechnology 19 115606 doi:10.1088/0957-4484/19/11/115606
XPS studies of DNA–cation-interacted self-assembled HgTe quantum dots formed under electrodeposition and their resultant biomolecular recognition application
S Rath1, S N Sarangi and S N Sahu2
Show affiliationsDNA interactions with multivalent cations, leading to wrapping around the cations and thermodynamically stable structure formation, followed by electrodeposition, have yielded a narrow size distributed single-crystalline HgTe–DNA quantum dot (QD) hybrid system. The mechanisms of the DNA interactions resulting in self-assembled HgTe QDs through phosphate–cation linkages and superstructure formation by nitrogen base interactions have been established by their respective binding energy shifts as evidenced from x-ray photoelectron spectroscopic studies. The photoluminescence peak position associated with HgTe QD single stranded DNA is red shifted in the presence of its conjugate and suggests the system as a potential optical probe for biomolecular recognition applications.
- PACS
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78.55.-m Photoluminescence, properties and materials
79.60.Jv Interfaces; heterostructures; nanostructures
87.15.M- Spectra of biomolecules
87.15.K- Molecular interactions; membrane-protein interactions
- Subjects
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Condensed matter: electrical, magnetic and optical
- Dates
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Issue 11 (19 March 2008)
Received 29 October 2007, in final form 15 January 2008
Published 18 February 2008
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XPS studies of DNA–cation-interacted self-assembled HgTe quantum dots formed under electrodeposition and their resultant biomolecular recognition application
S Rath et al 2008 Nanotechnology 19 115606
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M Krug et al 2009 New J. Phys. 11 105051
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