Adsorption is the process by which a gas, liquid or solute accumulates on the surface of a solid, forming a molecular or atomic film that is weakly bonded to the surface.
This category encompasses a wide range of subjects in the biological field.
The biomedical field combines the study of applied biology, biochemistry, chemistry, and physics to develop medical and biological applications.
Cleaning and Sterilization
Surface cleaning and sterilization are oftentimes required to remove organic and microbial contaminants and prepare surfaces for subsequent processing.
Contact printing enables patterning of a surface through use of a transfer template, simplifying pattern transfer and eliminating the use of more complicated photolithographic techniques.
Etching and Deposition
Etching and deposition are processes that remove or add, through chemical reaction or by physical means, layers of film from or onto the material surface.
Microfluidic devices enable the modeling of large systems or system components on a smaller, micron scale, increasing the potential for automation and portability, decreasing experimental measurement times, and decreasing experimental costs.
Nanofibers are fibers that have a diameter of less than 100 nanometers. They can be assembled to form nanofiber meshes and have a range of applications, including tissue engineering.
Nanoparticles are particles of nanometer size and exhibit materials properties that are different from that of their bulk equivalent.
Nanowires have lateral dimensions on the nanometer scale, with a length-to-width aspect ratio of 1000 or greater. Because of their one-dimensional character, nanowires are also known as quantum wires.
Self-assembly is the ordered arrangement of molecules onto a surface, through intermolecular or intramolecular bonding, with little or no assistance from external forces.
Sensors have been fabricated through contact printing, microelectronics, and self-assembly processing techniques for potential use in immunoassays, drug screening, gene identification, pharmacogenetics and forensics.
Solar / Photovoltaic Cells
Solar or photovoltaic cells are typically fabricated from multiple layers of inorganic or organic semiconductor film. Nanoscale cleanliness and precise surface chemistry are often required for optimal device performance.
Surface adhesion and the mechanical interaction of surfaces are greatly influenced by frictional forces and electrostatic potentials between molecules on two surfaces.
Surface Enhanced Raman Spectroscopy (SERS) Substrates
In SERS, Raman signal intensity can be greatly enhanced when probing organic or biological molecules on substrates decorated with metallic nanostructures. Plasma treatment may be applied towards fabricating such SERS substrates and removing probe molecules from SERS substrates without compromising the nanostructure morphology.
Surfaces may be modified through plasma treatment for a variety of materials requirements. These may include enhancement of surface adhesion, surface functionalization, cleaning and sterilization, surface oxidation, or plasma polymerization.
Surfaces may be patterned using a number or combination of techniques, including photolithography, self-assembly, and contact printing. Patterned surfaces can then be functionalized to act as filters or to be receptive to specific molecules.
The wettability of a surface may be modified through plasma treatment with the appropriate gas(es) to render a surface hydrophilic or hydrophobic.