Archive for February, 2010
Chemically grown ZnO NWs
by Mikhail Ladanov on Feb.16, 2010, under Recipe, SEM pictures
Forest of chemically grown ZnO nanowires. Solution was 5 mM/L of Hexamethylenetetramine and Zinc Nitrate in water at 90 °C. Substrate was seeded with ZnO nanocrystalline by dropcasting of 0.5 mM/L of Zinc Acetate Dihydrate in ethanol and consecutive annealing at 350 °C. SEM image is tilted 45°.
AFM set up
by Mikhail Ladanov on Feb.16, 2010, under Photos
AFM set up in Dr. Matthews laboratory, Department of Physics. Small, light, yet powerful. Easy to use.
ZnO nanostructures
by Mikhail Ladanov on Feb.10, 2010, under SEM pictures
Strangely shaped ZnO nanostructures grown by wet chemistry.
Microspheres lithography
by Mikhail Ladanov on Feb.10, 2010, under SEM pictures
If one needs a periodic pattern of metallic nanoislands, and size of interest is too small for easy and conventional lithography, microspheres lithography can be used. The idea is very simple – deposit a Self-Assembling Monolayer (SAM) of polystyrene spheres…
…evaporate metal on top…
…and wash these spheres away by sonication in toluene.
What’s left will be triangle periodic nanoislands. Density of which can be controlled by size of the spheres.
Graphene
by Mikhail Ladanov on Feb.10, 2010, under SEM pictures
Graphene particle on ZnO NW forest.
Melted Au nanoparticles on Si surface
by Mikhail Ladanov on Feb.10, 2010, under SEM pictures
Au nanoparticles were seeded on Si surfaced and annealed just below gold melting temperature in low vacuum for 30 minutes to get these Au droplets. They droplets can be used as catalyst for nanostractures growth with controlled density.
Flowers are growing here
by Mikhail Ladanov on Feb.10, 2010, under SEM pictures
