Journal ArticleDOI
Lithographically patterned nanowire electrodeposition: a method for patterning electrically continuous metal nanowires on dielectrics.
Chenxiang Xiang,Sheng-Chin Kung,David K. Taggart,Fan Yang,Michael A. Thompson,Aleix G. Güell,Yongan Yang,Reginald M. Penner +7 more
TLDR
The temperature-dependent resistance of 100 microm sections of Au and Pd wires is measured in order to estimate an electrical grain size for comparison with measurements by X-ray diffraction and transmission electron microscopy.Abstract:
Lithographically patterned nanowire electrodeposition (LPNE) is a new method for fabricating polycrystalline metal nanowires using electrodeposition. In LPNE, a sacrificial metal (M1 = silver or nickel) layer, 5−100 nm in thickness, is first vapor deposited onto a glass, oxidized silicon, or Kapton polymer film. A (+) photoresist (PR) layer is then deposited, photopatterned, and the exposed Ag or Ni is removed by wet etching. The etching duration is adjusted to produce an undercut ≈300 nm in width at the edges of the exposed PR. This undercut produces a horizontal trench with a precisely defined height equal to the thickness of the M1 layer. Within this trench, a nanowire of metal M2 is electrodeposited (M2 = gold, platinum, palladium, or bismuth). Finally the PR layer and M1 layer are removed. The nanowire height and width can be independently controlled down to minimum dimensions of 5 nm (h) and 11 nm (w), for example, in the case of platinum. These nanowires can be 1 cm in total length. We measure the ...read more
Citations
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Journal ArticleDOI
Silicon nanowire biosensor and its applications in disease diagnostics: A review
Guo-Jun Zhang,Yong Ning +1 more
TL;DR: A comprehensive review about the fabrication of SiNW biosensors and their applications in disease diagnostics discusses the detection of important biomarkers related to diseases including cancer, cardiovascular diseases, and infectious diseases.
Journal ArticleDOI
Fast, sensitive hydrogen gas detection using single palladium nanowires that resist fracture.
TL;DR: Two types of pure palladium (Pd) nanowires, differentiated by microstructure, were electrodeposited and showed a rapid increase in resistance in the presence of H(2) and a response that scaled smoothly with [H(2)] spanning 5 orders of magnitude down to 2 ppm.
Journal ArticleDOI
Smaller is faster and more sensitive: the effect of wire size on the detection of hydrogen by single palladium nanowires.
TL;DR: It is concluded that the kinetics of hydrogen adsorption limits the observed response rate seen for the nanowire, and that hydrogen desorption from thenanowire limits the observation recovery rate; proton diffusion within PdHx does not limit the rates of either of these processes.
Journal ArticleDOI
20 μs Photocurrent Response from Lithographically Patterned Nanocrystalline Cadmium Selenide Nanowires
TL;DR: Structural characterization of nc-CdSe nanowires by X-ray diffraction and transmission electron microscopy reveals they are composed of stoichiometric, single phase, cubic CdSe with a mean grain diameter of 10 nm.
Journal ArticleDOI
Mesoporous Manganese Oxide Nanowires for High-Capacity, High-Rate, Hybrid Electrical Energy Storage
Wenbo Yan,Talin Ayvazian,Jungyun Kim,Yu Liu,Keith C. Donavan,Wendong Xing,Yongan Yang,John C. Hemminger,Reginald M. Penner +8 more
TL;DR: Arrays of mesoporous manganese dioxide, mp-MnO(2), nanowires were electrodeposited on glass and silicon surfaces using the lithographically patterned nanowire electrodeposition (LPNE) method using a sequence of 0.60 V voltage pulses delineated by 25 s rest intervals.
References
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The Scherrer Formula for X-Ray Particle Size Determination
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Journal ArticleDOI
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