Juan Carlos Salcedo Reyes

Juan Carlos Salcedo Reyes

Pontificia Universidad Javeriana, Colombia

Title: SERS stem cells bio-sensor based on Au/ SiO2 colloidal crystals substrates


Juan Carlos Salcedo Reyes has completed his PhD at Cinvestav, México D.F., postdoctoral research at University of Texas at Dallas and Instituto de Ciencia de Materiales, Madrid, Spain. More than 30 scientific papers, 1 Colombian patent, and 1 US patent. Editor in chief, Universitas Scientiarum (Scientific journal of the faculty of sciences, Universidad Javeriana, Bogotá D.C., Colombia)


Colloidal crystals (CC) are self-assembled metamaterials with a periodic refractive index fabricated from colloidal SiO2 or polystyrene spheres. Lately, different structured porous films template by CCs are being used as substrates in Surface-Enhanced Raman Spectroscopy (SERS). Taking into account that, due to the localized surface plasmon resonance phenomenon, SERS substrates should satisfice conditions of nanoscale structure (porosity), periodicity and chemical stability, in this work, we use a thin film (50 nm) of gold sublimated on a 250 nm SiO2 based CC in order to detect changes of cellular biochemistry of stem cells by SERS