Study on surface chemistry and particle size of porous silicon prepared by electrochemical etching

Investigation the effect of porosity on corrosion of macroporous silicon in 1.0M sodium hydroxide solution using weight loss measurements, electrochemical methods and scanning electron microscope

“…At present, the porous silicon has been successfully applied in electronics, photonics and biosensing [3][4][5][6][7] because of numerous unique characteristics, such as the high specific surface area, convenient surface chemistry, significant optical properties and electronic properties, biocompatibility, biodegradability, bioresorbability and low toxicity, etc. Additionally, mainly used as an insulating layer in the silicon-on-insulator [8][9] , a sensing layer in biosensors [9] or chemical sensors [10] , an energy carrier [11] , a sacrificial layer in micromachining [12] , an important material for solar cell [13] and an excellent biomaterial in tissue engineering, tumor imaging and bioreactor platform drug delivery [3,7] .…”

“…Additionally, mainly used as an insulating layer in the silicon-on-insulator [8][9] , a sensing layer in biosensors [9] or chemical sensors [10] , an energy carrier [11] , a sacrificial layer in micromachining [12] , an important material for solar cell [13] and an excellent biomaterial in tissue engineering, tumor imaging and bioreactor platform drug delivery [3,7] . However, there are few works focusing on the applications of porous silicon in alkaline solution resulting from the corrosion and dissolution of porous silicon in these solutions [14][15][16] .…”

Fabrication and application of porous silicon multilayered microparticles in sustained drug delivery

“…UnPSi microparticles exhibits bands due to mCAH stretching modes at 2923 and 2853 cm À1 and mC@O stretching vibrations at 1708 cm À1 (Fig. 2(c)) [21][22][23]. Fig.…”

Controlled delivery of acyclovir from porous silicon micro- and nanoparticles

“…2) [12]. Thermal oxidation of PSi particles was performed in muffle furnace (Rivotek, Chennai, India) by heating at 300 • C for 2 h. Thermal hydrosilylation of PSi particles was performed in commercial consumer microwave oven (Samsung, ME83HD, India) by heating particles immersed in undecylenic acid (98%, Sigma-Aldrich, India) at 300 W for 4 min.…”

“…PSi with desired physical and optical properties such as pore size, porosity, thickness, and reflectance can be easily tuned by varying current density and etching time. The prepared PSi layer can be removed from the Si substrate by electropolishing and subsequently fractured by ultrasonication or wet milling process to prepare micro-and nanoparticles [11][12][13]. The surface chemistry of PSi has a strong influence on the drug loading and its release behaviour in the biological systems.…”