Quantitative AES-Mapping and Depth Profiling

Chemical and Biological Applications of Porous Silicon Technology

“…The most active surfaces were those formed from an ntype epilayer on an n + substrate, anodized with illumination at 100 mA cm ±2 . [48] These surfaces have the characteristic duplex structure of high porosity material above a macroporous skeleton. Surfaces with extremely high surface areas, such as p + -type substrates anodized at 100 mA cm ±2 , actually show lower specific activity due to the homogeneously small pore distribution, which limits reactant diffusion.…”

Biocatalytic Porous Silicon Microreactors

“…A too thick PS layer will not add any further catalytic performance to the lIMER and possibly only induce band broadening when using the reactor in a FIA mode. In order to find the optimal depth of the porous layer, a study was undertaken to investigate both planar and lIMER structures with varying pore depth and anodized under different current densities [31]. The silicon used was h110i silicon, p-type (10-20 X cm).…”

Interference Elimination in Glutamate Monitoring with Chip Integrated Enzyme Microreactors

“…To decrease the sample dispersion, it is also desired to have the smallest possible dead volume. The porous silicon used for reactor construction has previously been shown to provide an increase in catalytic turn-over of up to 350 times when compared to a nonporous planar surface [49] and up to 170 times for the microfabricated reactor structure [50]. In this work, two reactors of different sizes were evaluated (see Table 2) concerning their dispersion and interference elimination ability.…”