Nanoscale assembly of nanowires templated by microtubules

Jing Zhou, Tzy Jiun Mark Luo, Yan Gao, Mei Xue, Joseph Lau, Toshikazu Hamasaki, Evelyn Hu, Kang Wang, Bruce Dunn

研究成果: Conference contribution


Conventional top-down lithographic processes approach their practical and theoretical limits at dimensional scales less than 100 nm. Alternative bottom-up methods are being investigated to build nanoscale architectures, including the use of biomolecules whose functional groups bind inorganic particles. In this study, the fabrication and alignment of microtubule-based nanowires are investigated. Microtubules (MT) are fibrous proteins found in nearly all eukaryotes. Our work was carried out using polymerized alpha- and beta-tubulins, which were cross-linked with glutaraldehyde to stabilize the protein structure. Ni coated microtubules were fabricated by reducing Ni2+ to Ni 0 on Pd activated microtubule surface. Focus Ion Beam was used to write metal contacts on these Ni microtubule nanowires and DC conductivity values were measured. Au deposition on MT was performed by both electroless deposition and electrodeposition, by reducing HAuCl4 onto MT prebound with 2 nm Au colloids. Although most MTs exhibited discontinuous Au binding, a fraction of MTs were covered completely by Au. Preliminary electrical measurements for these materials are reported. Alignment of microtubules was also achieved by injecting MTs into microfluidic devices over amine-coated substrate surfaces. These biotemplating approaches are the first steps towards constructing more complicated 2D and 3D architectures.

主出版物標題Assembly at the Nanoscale
主出版物子標題Toward Functional Nanostructured Materials
發行者Materials Research Society
ISBN(列印)1558998551, 9781558998551
出版狀態Published - 2005
事件2005 MRS Fall Meeting - Boston, MA, United States
持續時間: 2005 11月 282005 12月 2


名字Materials Research Society Symposium Proceedings


Conference2005 MRS Fall Meeting
國家/地區United States
城市Boston, MA

All Science Journal Classification (ASJC) codes

  • 材料科學(全部)
  • 凝聚態物理學
  • 材料力學
  • 機械工業


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