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SEMINAR
Inorganic Materials Analysis and Testing Center
Inorganic Coating Materials Research Center
无机材料分析测试中心
特种无机涂层研究中心
In-situ TEM Electrical and Mechanical Properties Measurements of
Low-Dimensional Inorganic Nanomaterials
Speaker:
Prof. Dr. Dmitri Golberg
Nanoscale Materials Center and
World Premier International Center for Materials Nanoarchitectonics (MANA),
National Institute for Materials Science (NIMS), Tsukuba, Japan
时间：2008年3月24日 （星期一）10：15－11：15
地点：三号楼二楼会议室
联系人：许钫钫 祝迎春
欢迎广大科研人员和研究生参与讨论！
In-situ TEM electrical and mechanical properties measurements of
low-dimensional inorganic nanomaterials
Dmitri Golberg
Nanoscale Materials Center and
World Premier International Center for Materials Nanoarchitectonics (MANA),
National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba, Japan
The present contribution will describe an alternative way of individual low-dimensional inorganic nanostructure electrical and mechanical properties measurements, as opposed to commonly utilized STM- and AFM-based techniques, which use complex pre-patterned substrate circuits containing nanotubes, nanowires, nanobelts etc. Herein all measurements have been performed in ultra-high vacuum, on free-standing objects, inside high-resolution field-emission transmission electron microscopes operating at 300 kV by means of dedicated piezo-driven STM-TEM and AFM-TEM holders. A sharp etched gold tip, as the STM tip, and a silicon cantilever, as the AFM probe, have been assembled within the holders commercialized by the “Nanofactory Instruments, AB”. The objects of interests were mounted on the counter piezo-driven metallic contacts. The successful examples will cover a diverse range of individual inorganic nanostructures, e.g. multi-walled boron nitride1-4 and N-doped carbon nanotubes5,6, zinc oxide nanorods and nanowires,7 double-walled carbon nanotubes, cadmium sulfide nanobelts, multi-walled carbon nanotubes filled with copper,8 copper iodide etc. All the current-voltage (STM-TEM) and/or force-displacement (AFM-TEM) curves were taken with a full control of the nanomaterial morphological, structural and chemical changes/transformations during all stages of probing/manipulation. This allows us to unambiguously interpret many new interesting physical and electromechanical phenomena peculiar to low-dimensional inorganic nanomaterials. These include but are not limited to a deformation-driven electrical transport and piezoelectricity in individual multi-walled BN nanotubes, a time-resolved electrical transport in N-doped C nanotubes, and a rheostat-like behavior, a dedicated femtogram and attogram mass transport, and nanopipetting in Cu- and Cu-halide-filled C nanotubes.
The author is indebted to Pedro M.F.J. Costa, Xuedong Bai, Oleg Lourie, Keiji Kurashima, Masanori Mitome and Yoshio Bando for their contributions to the work and fruitful discussions.
References
[1] Golberg D., Bando Y., Tang C.C., Zhi C.Y. Adv. Mater. 19, 2413 (2007).
[2] Golberg D., Costa P.M.F.J., Lourie O., Mitome M., Tang C.C., Zhi C.Y., Kurashima K., Bando Y.
Nano Lett.7, 2146 (2007).
[3] Golberg D., Bai X.D., Mitome M., Tang C.C., Zhi C.Y., Bando Y. Acta Mater. 55, 1293 (2007).
[4] Bai X.D., Golberg D., Bando Y., Zhi C.Y., Tang C.C., Mitome M., Kurashima K. Nano Lett. 7, 632 (2007).
[5] Costa P.M.F.J., Golberg D., Mitome M., Bando Y. Appl. Phys. A (2007), in press.
[6] Costa P.M.F.J., Golberg D., Mitome M., Bando Y. Appl. Phys. Lett. (2007), submitted.
[7] Costa P.M.F.J., Golberg D., Mitome M., Shen G.Z., Bando Y. J. Mater. Sci. (2007), in press.
[8] Golberg D., Costa P.M.F.J., Mitome M., Mueller Ch., Hampel S., Leonhardt A., Bando Y.
Adv. Mater. 19, 1937 (2007).
