Laser welding of a single tungsten oxide nanotip on a handleable tungsten wire: A demonstration of laser-weld nanoassembly

The authors demonstrate that individual nanotips (W18O49) may be laser welded onto the supporting microtip. The nanotip-microtip assembly can be handheld or ready for further manual manipulation, and thus is very useful for individual nanowire’s characterization, selection, and applications in nanoprobe analysis, nano-optical and nanoelectronic devices, and biostudy. Well mechanical and electrical connections are shown between the nanotip-microtip. Field emission characterization shows that the welded nanotip is a promising candidate for point electron source application.