58
A. Hu et al.
Fig. 1.41 A DNA-templated carbon nanotube FET and metallic wires contacting it. SEM images
of SWNTs contacted by self-assembled DNA-templated gold wires. a An individual SWNT. b A
rope of SWNTs. Scale bars, 100 nm [254]
1.7 Ultrafast Laser Near- and Super-Resolution
Manufacturing
For decades, the ultrafast laser has been successfully used in cutting, drilling, welding,
cleaning, surface modification, micromachining, and additive manufacturing [256].
Super-resolution processing is always one of the attractive goals of precision laser
processing. Super-resolution laser manufacturing technology refers to technology
that manufactures or processes dimensions smaller than the optical diffraction limit
of the laser system (~λ/(2n.sinα)). At present, the smallest voxel size is about 50 nm,
which is equivalent to 0.5 million dots per inch (dpi) in today’s 2D graphics printing
[257]. Although this value is already more than ten times smaller than the laser
wavelength used, they are insufficient to manufacture many components compared
to an electron beam with a resolution of a few nanometers, which is frequently
required for a molecular device. Therefore, many innovative methods are still under
development to further increase the resolution.
A. Hu et al.
Fig. 1.41 A DNA-templated carbon nanotube FET and metallic wires contacting it. SEM images
of SWNTs contacted by self-assembled DNA-templated gold wires. a An individual SWNT. b A
rope of SWNTs. Scale bars, 100 nm [254]
1.7 Ultrafast Laser Near- and Super-Resolution
Manufacturing
For decades, the ultrafast laser has been successfully used in cutting, drilling, welding,
cleaning, surface modification, micromachining, and additive manufacturing [256].
Super-resolution processing is always one of the attractive goals of precision laser
processing. Super-resolution laser manufacturing technology refers to technology
that manufactures or processes dimensions smaller than the optical diffraction limit
of the laser system (~λ/(2n.sinα)). At present, the smallest voxel size is about 50 nm,
which is equivalent to 0.5 million dots per inch (dpi) in today’s 2D graphics printing
[257]. Although this value is already more than ten times smaller than the laser
wavelength used, they are insufficient to manufacture many components compared
to an electron beam with a resolution of a few nanometers, which is frequently
required for a molecular device. Therefore, many innovative methods are still under
development to further increase the resolution.