Nanostructured (porous) silicon: growth strategies, surface modification and biomedical applications
CIC nanoGUNE Seminars
- Speaker
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Miguel Manso, UAM, Spain
- When
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2018/12/10
12:00 - Place
- nanoGUNE seminar room, Tolosa Hiribidea 76, Donostia - San Sebastian
- Add to calendar
-
iCal
The current developments in processing of silicon nanostructures promise a
long lasting presence of silicon among forefront technological materials after
its supremacy during the micro-electronics era. We will demonstrate that the
"classical" processing of nanostructured (porous) silicon (PSi) by
electrochemical etching is still valid to face new fundamental and
technological challenges. Using different organosilane functionalizations of
columnar PSi and wet scanning transmission electron microscopy, we show that
local water adsorption isotherms can be obtained, reflecting the surface
termination properties (hydrophilic/hydrophobic) of the produced PSi surfaces.
We further illustrate how visible light can be used to activate the assembly
of organosilanes on PSi. Based on this activation, we propose a full
biofunctionalization cascade to fabricate an impedimetric biosensing
structure, which is enhanced by gold nanoparticles through a sandwich assay.
Laser processing offers increasingly attractive ways of processing Si
nanostructures, including PSi. We will show our first results of
characterization and properties of PSi produced by direct laser writing
(LWSi). Results will concentrate on the use of LWSi structures to guide and
confine pluripotential mesenchymal stem cells and for the non-noble-metal
surface enhanced Raman scattering detection of a model drug (apomorphine).
**Host** : A. Bittner