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.
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7 May 2001
Research Article|
May 07 2001
DNA-mediated electrostatic assembly of gold nanoparticles into linear arrays by a simple drop-coating procedure
Murali Sastry;
Murali Sastry
Materials Chemistry Division, National Chemical Laboratory, Pune–411 008, India
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Ashavani Kumar;
Ashavani Kumar
Materials Chemistry Division, National Chemical Laboratory, Pune–411 008, India
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Suvarna Datar;
Suvarna Datar
Centre for Advanced Studies in Materials Science, Department of Physics, University of Pune, Pune–411 008, India
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C. V. Dharmadhikari;
C. V. Dharmadhikari
Centre for Advanced Studies in Materials Science, Department of Physics, University of Pune, Pune–411 008, India
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Krishna N. Ganesh
Krishna N. Ganesh
Organic Chemistry (Synthesis) Division, National Chemical Laboratory, Pune–411 008, India
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Appl. Phys. Lett. 78, 2943–2945 (2001)
Article history
Received:
January 15 2001
Accepted:
March 12 2001
Citation
Murali Sastry, Ashavani Kumar, Suvarna Datar, C. V. Dharmadhikari, Krishna N. Ganesh; DNA-mediated electrostatic assembly of gold nanoparticles into linear arrays by a simple drop-coating procedure. Appl. Phys. Lett. 7 May 2001; 78 (19): 2943–2945. https://doi.org/10.1063/1.1370993
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