The ability to tailor the chemical composition and structure of a
surface on the 1–100 nm length scale is important to researchers
studying topics ranging from electronic conduction, to catalysis, to
biological recognition in nanoscale systems.
While microfabrication techniques such as photolithography, microcontact
printing, micromachining, and microwriting can pro
the nozzle.
The nozzle can be moved in both horizontal and vertical directions by a numerically controlled mechanism.
SLA - Stereolithography
An additive manufacturing process by curing a photo-reactive resin
Liquid ultraviolet curable photopolymer and an ultraviolet laser to build layers
The laser beam traces a cross-section ofthe part pattern on thesurface.
Exposure tothe ultravio
3D printing
3D printing or additive manufacturing (AM) refers to any ofthe various processes for printing a three-dimensional object. Primarily additive processes are used, in which successive layers of material are laid down under computer control. These objects can be of almost any shape or geometry, and are produced from a 3D model or other electronic data source.
Basic principles
If the
the side-wall image of hierarchical ZnO nanostructure with widths of 70–-120 nm and average length of around 600 nm. The high-magnification image ofthe single nanorod on the side-wall displays columniform structure with a conic tip which is quite different from the hexagonal structure in Fig. 1(d), indicating that the ZnO nanorods are not synthesized through the layer-by-layer growth model
- demonstrate that the film is of single monolayer thickness.
Fourier-transform infrared spectroscopy (FT-IR):
- measure the vibrational frequencies of bonds
- yield a pictures of relative order and fraction of chain defects
Scanning probe microscopes: STM;AFM;LFM
greatly assisted inthe patterning of SAMs by analyzing the spatial distribution of adsorbates across a surface.