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Singapore-MIT Alliance Programme for Advanced Materials in Micro- and Nano-Systems Flagship Research Program Annual Report Nanotechnology on a Silicon Platform Co-Chairs: Choi Wee Kiong (NUS) and Carl V. Thompson (MIT)

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Singapore-MIT Alliance Programme for

Advanced Materials in Micro- and Nano-Systems

Flagship Research Program

Annual Report

Nanotechnology on a Silicon Platform

Co-Chairs: Choi Wee Kiong (NUS) and Carl V. Thompson (MIT)

Faculty Associates: Dimitri Antoniadis (MIT), Yet-Ming Chiang (MIT), W.K. Chim (NUS), S.J. Chua (NUS/IMRE), Eugene Fitzgerald (MIT), K.P. Loh (NUS), Nicola Marzari (MIT), K.L. Pey (NTU), Caroline Ross (MIT), Henry I. Smith (MIT), Francesco Stellacci (MIT), John Thong (NUS), C.C. Wong (NTU), S.F. Yoon (NTU), Q. Zhang (NTU)

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Objective: Develop and demonstrate concepts and processes for assembling nanoscale materials in complex, deterministic patterns, in which they can be incorporated into complex patterns of devices.

Our program was originally organized into thrusts on:

Nanolithography

Templated Self-Assembly

Chemically-Driven Assembly

Field-Driven Assembly

with exploratory research on nanowire photonic devices and nanodot memory devices.

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As our program has matured, advances in templated, chemically-driven and field-driven assembly, have been applied to organization of specific devices and device structures. We therefore now organize our program along the following themes:

    • Nanolithography and Templated Self Assembly
    • Nanodots: Synthesis, Assembly, and Devices
    • Nanowires: Synthesis, Assembly, and Devices
    • Nanotubes: Synthesis, Assembly, and Devices
  • The original research on assembly approaches continues within this revised structure, and the original milestones and deliverables have been retained.
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Templated-self-assembly:

Long-range-ordered scaffolds for functional nanowire arrays

Deep sub-lithographic assembly of lamella arrays

for nanoscale patterning of in-plane wire arrays

Self-assembled two-component colloidal crystal, for photonic and phononic devices

Some Assembly Examples from This Year

Chemically-directed dielectrophoretic assembly of nanodots between electrodes

Self-assembled Ge nanodots for memory devices

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Electrical Characterization of a Self-Assembled Si NW FET: Demonstration of Concept

  • Templated assembly of catalyst and colloidal particles (Thompson, Choi, Chiang, Wong)
  • Vapor-liquid-sold wire growth (Pey, Fitzgerald, Choi, Antoniadis, Thompson)
  • Characterization and modeling (Antoniadis, Pey)
  • Cross-over research: catalyst assembly techniques
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♦ Flagship research activities have been highly collaborative and have involved exchanges of visits of students and staff among all three universities.

♦ These research interactions have already led to many publications (36 journal articles, of which 22 are joint publications), and these interactions are expected to lead to an increasing number of joint publications in future years.

♦ Flagship research teams are expanded by students and postdocs with other support, research is often complimentary to research supported through other programs, both within the US and Singapore, and is therefore leveraged through this support other support.

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