Parallel or interconnected pores’ formation through etchant selective silicon porosification

Pulsed Laser Porosification of Silicon Thin Films

We present a new and simple laser-based process to porosify thin film silicon using a pulsed laser. During deposition, we incorporate gas atoms or molecules into the Si thin film. Pulsed laser radiation of wavelength λ = 532 nm heats up thin film Si beyond its melting point. Upon heating, gas atoms or molecules form nm-sized thermally expanding gas bubbles in the silicon melt, until they explos...

Formation of porous silicon through the nanosized pores of an anodized alumina template

Formation of anion-selective membrane pores by texenomycin A, a basic lipopeptaibol antibiotic.

Peptaibols are fungal linear peptides that owe their biological activities to the formation of ion-penetrable pores within biological membranes1,2). Our previous investigations suggested that the constituting amino acids determine channel stability, ion selectivity and biological activities3,4). Lipopeptaibol antibiotics such as texenomycin A5) (1, Fig. 1) are distinguishable from the common pe...

Integration of amorphous and polycrystalline silicon thin-film transistors through selective crystallization of amorphous silicon

Selective exposure of a hydrogenated amorphous silicon ~a-Si:H! film to a room-temperature hydrogen plasma using a patterned masking layer and a subsequent anneal at 600 °C, results in patterned polycrystalline and amorphous silicon regions. However, most of the hydrogen in the amorphous silicon is lost, leading to severe degradation in its properties. In this letter, we report the rehydrogenat...

Selective ionic transport through tunable subnanometer pores in single-layer graphene membranes.

We report selective ionic transport through controlled, high-density, subnanometer diameter pores in macroscopic single-layer graphene membranes. Isolated, reactive defects were first introduced into the graphene lattice through ion bombardment and subsequently enlarged by oxidative etching into permeable pores with diameters of 0.40 ± 0.24 nm and densities exceeding 10(12) cm(-2), while retain...