200 nm 50 mm Electrochemical Coating of a Stent HR-SEM images of a latex film electrochemically deposited on a stainless steel stent under a constant potential of 1.3 V for 10 min: (A) The stent after deposition (B) higher magnification of the deposited film
Electroassisted Deposition of Polylactic Acid Biodegradable Nanoparticles films before and after annealing 1.9 V 1.7 V
Au microelectrode AuCl4- 0.5 s 1 s 5 s 10 s Local Electroplating by Scanning Electrochemical Microscopy (SECM) Conditions: 0.1 M HCl, 1-5 mM H2Q, 25 mm Au, approaching by O2 reduction, Etip(dep)= 0.1 V vs. QRE Ag A series of pulses ranging from 0.5-10 sec.
A B Cu Cu/HS(CH2)2SO3- D C Cu/HS(CH2)NH3+ Cu/HS(CH2)2CO2- Electroless Displacement on the Entire Cu Surface The effect of a short self-assembled monolayer
0.5 sec 1 sec 2 sec 4 sec Effect of a Self-Assembled Monolayer on the Localized Galvanic Displacement SEM images of Ag deposits on modified Cu surfaces with 2-mercaptoetanesulfonic acid (HS(CH2)2SO3-).
Forensic Science and Nanotechnology: Applying Nanoparticles for Visualizing Latent Fingerprints Ag+ Ag+ Fe3+ Fe3+ Fingerprint Ridge Fe2+ Fe2+ Ag Ag substrate substrate The challenge: visualizing fingerprints on wet papers The reason: the amino acids dissolve The solution: electroless deposition The problem: irreproducible Ag++Fe2+Ag+Fe3+ Sametband et al. Chem. Comm. 2007, 1142-1144
Comparison chainlength C10 C14 C18
Functionalized Coatings: Photothermal Conversion of Solar Energy (with Shlomo Magdassi) • Developing a photothermal coating for high temperatures (stable at 750°C): • High absorptance (95%). • Corrosion resistance. • Good adhesion to substrate. • Inexpensive and easily applied. Cermet – Ceramic Metals Pigment Binder Metal
Monitoring and Cleaning of Heavy Metals Monitoring Cleaning H2O e- Hg, Cd, Cr… OH-+H2 + Cu2+ [Cu(OH)2](s)