• Proceedings of the Korean Vacuum Society Conference
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• 2010.02a
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• pp.83-83
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• 2010

We report a new direct printing method, called liquid-mediated nanotransfer molding (LB-nTM), that uses a polar liquid-mediated transfer process. LB-nTM is based on the direct transfer of various materials from a stamp to a substrate via a liquid- bridge between the stamp and the substrate. This procedure can be adopted in automated printing machines that generate various material patterns with a wide range of feature sizes (as small as 60 nm) on diverse substrates. To demonstrate its usefulness, the LB-nTM method was applied to prepare ZnO-nanowire and TIPS-pentacene transistors.

• Journal of Powder Materials
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• v.16 no.2
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• pp.138-145
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• 2009

The combination of focused ion beam (FIB) and 4 point probe nanomanipulator could make various nano manufacturing and electrical measurements possible. In this study, we manufactured individual ZnO nanowire devices and measured those electrical properties. In addition, tensile experiments of metallic Au and Pd nanowires was performed by the same directional alignment of two nanomanipulators and a nanowire. It was confirmed from I-V curves that Ohmic contact is formed between electrodes and nanomanipulators, which is able to directly measure the electrical properties of a nanowire itself. In the mechanical tensile test, Au and Pd nanowires showed a totally different fracture behavior except the realignment from <110> to <002>. The deformation until the fracture was governed by twin for Au and by slip for Pd nanowires, respectively. The crystallographic relationship and fracture mechanism was discussed by TEM observations.

• Proceedings of the Korean Vacuum Society Conference
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• 2014.02a
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• pp.369.1-369.1
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• 2014

Au-functionalized $WO_3$ nanotubes were synthesized using ZnO nanowire templates. Transmission electron microscopy revealed the Au nanoparticles on the outer surface of a typical $WO_3$ nanotube ranged from 5 to 25 nm. The multiple networked Au-functionalized $WO_3$ nanotube sensors showed responses of 820-3, 924% in the $NO_2$ concentration range of 1-5 ppm at $300^{\circ}C$. These responses were approximately 5-12 fold higher than those observed for pristine $WO_3$ nanotube sensors over the same $NO_2$ concentration range. A model describing the gas sensing mechanism of Au-functionalized $WO_3$ nanotubes is discussed.