Growth of nanostructures with controlled diameter

Pfefferle, Lisa; Haller, Gary; Ciuparu, Dragos

Growth of nanostructures with controlled diameter

Patent · 02 February 2009

OSTI ID:1176189

Pfefferle, Lisa; Haller, Gary; Ciuparu, Dragos

Transition metal-substituted MCM-41 framework structures with a high degree of structural order and a narrow pore diameter distribution were reproducibly synthesized by a hydrothermal method using a surfactant and an anti-foaming agent. The pore size and the mesoporous volume depend linearly on the surfactant chain length. The transition metals, such as cobalt, are incorporated substitutionally and highly dispersed in the silica framework. Single wall carbon nanotubes with a narrow diameter distribution that correlates with the pore diameter of the catalytic framework structure were prepared by a Boudouard reaction. Nanostructures with a specified diameter or cross-sectional area can therefore be predictably prepared by selecting a suitable pore size of the framework structure.

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Research Organization:: Yale Univ., New Haven, CT (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

DOE Contract Number:: FG02-01ER15183

Assignee:: Yale University (New Haven, CT)

Patent Number(s):: 7,485,279

Application Number:: 10/726,394

OSTI ID:: 1176189

Country of Publication:: United States

Language:: English

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