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DNA-templated semiconductor nanoparticle chains and wires

Lookup NU author(s): Dr Liqin Dong, Tom Hollis, Professor Bernard Connolly, Professor Nick Wright, Dr Ben Horrocks, Professor Andrew HoultonORCiD


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The use of DNA strands to grow or organize the binary semiconductor CdS, is analyzed. Quantum-confined CdS was prepared, where the reaction was controlled through careful optimization of the reaction conditions and the state of the DNA. Reactions of cadmium and sulfide ions on surface-bound DNA employed two different surface, such as mica and alkyl monolayers on single-crystal Si(111). The mica surfaces allowed the DNA molecules to be anchored through interactions between the metal ions, the surface oxygen functionalities, and the phosphate groups. The images of CdS nanoparticles templated at DNA on mica were obtained by using AFM. Reactions at DNA were aligned through combining onto alkylated Si(111) produced material. Results show that the surface contains randomly coiled strands, indicating that the DNA is mobile during the reaction sequence.

Publication metadata

Author(s): Dong L, Hollis T, Connolly BA, Wright NG, Horrocks BR, Houlton A

Publication type: Article

Publication status: Published

Journal: Advanced Materials

Year: 2007

Volume: 19

Issue: 13

Pages: 1748-1751

ISSN (print): 0935-9648

ISSN (electronic): 1521-4095

Publisher: Wiley - VCH Verlag GmbH & Co. KGaA


DOI: 10.1002/adma.200602543


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