DNA-mediated electrostatic assembly of gold nanoparticles into linear arrays by a simple drop-coating procedure

Murali Sastry; Ashavani Kumar; Suvarna Datar; C. V. Dharmadhikari; Krishna N. Ganesh

doi:10.1063/1.1370993

DNA-mediated electrostatic assembly of gold nanoparticles into linear arrays by a simple drop-coating procedure

Murali Sastry, Ashavani Kumar, Suvarna Datar, C. V. Dharmadhikari, Krishna N. Ganesh

Research output: Contribution to journal › Article › Research › peer-review

85 Citations (Scopus)

Abstract

The assembly of nanoparticles in topologically predefined superstructures is an important problem in the area of nanoscale architecture. In this letter, we demonstrate the electrostatic assembly of lysine-capped colloidal gold particles on drop-coated DNA films. Electrostatic interaction between the positive charges on the gold nanoparticles and the negative charges on the phosphate groups of the DNA template molecules leads to the assembly of the gold nanoparticles in linear superstructures. The use of DNA as templates for the assembly of nanoparticles shows promise for extension to more complex geometries through rational design of the DNA base sequences as well as in the realization of nanowires by stringing together metal nanoparticles.

Original language	English
Pages (from-to)	2943-2945
Number of pages	3
Journal	Applied Physics Letters
Volume	78
Issue number	19
DOIs	https://doi.org/10.1063/1.1370993
Publication status	Published - 7 May 2001
Externally published	Yes

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AU - Ganesh, Krishna N.

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DNA-mediated electrostatic assembly of gold nanoparticles into linear arrays by a simple drop-coating procedure

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