title: Localized temperature and chemical reaction control in nanoscale space by nanowire array.
abstract: We introduce a novel method for chemical reaction control with nanoscale spatial resolution based on localized heating by using a well-aligned nanowire array. Numerical and experimental analysis shows that each individual nanowire could be selectively and rapidly Joule heated for local and ultrafast temperature modulation in nanoscale space (e.g., maximum temperature gradient 2.2 K/nm at the nanowire edge; heating/cooling time < 2 μs). By taking advantage of this capability, several nanoscale chemical reactions such as polymer decomposition/cross-linking and direct and localized hydrothermal synthesis of metal oxide nanowires were demonstrated.
authors.affiliation: Department of Mechanical Engineering and KI for the NanoCentury,  Korea Advanced Institute of Science and Technology  (KAIST), Daejeon, Republic of Korea.
authors.forename: C Yan
authors.initials: CY
authors.lastname: Jin
authors.forename: Zhiyong
authors.initials: Z
authors.lastname: Li
authors.forename: R Stanley
authors.initials: RS
authors.lastname: Williams
authors.forename: K-Cheol
authors.initials: KC
authors.lastname: Lee
authors.forename: Inkyu
authors.initials: I
authors.lastname: Park
mesh_terms: D003460:Crystallization / Q000379:methods*; D006358:Hot Temperature; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D013499:Surface Properties
chemical_list: D046911:Macromolecular Substances