STM – TechConnect Briefs

Nanocharacterization Studies on Surface Modified Nanoporous Gold Films for Sensor Applications

Joshi M., Swastic S., Vemula J.K., Priydarshi K., Deshpande A., Ramanan S.R., Krishnan J.N., BITS Pilani, K. K. Birla Goa Campus, IN

Nano porous gold film is fabricated by electroless plating with Potassium Gold Cyanide as plating solution. E-beam deposited Cu substrates are chosen for plating experiments. SEM studies revealed the pore size to be 100+20 nm [...]

Effect of surface reconstruction on the growth of self-assembled Ag nanostructures on Si(111) surfaces

Goswami D.K., Indian Institute of Technology Guwahati, IN

In this work, we have shown that how buried interface structure of Si(111) surface influence the growth of Ag nanostructure growth. Electronic growth modes for Ag on Si(111)-7x7 surface can only be observed if the [...]

Fuel cell catalysts based on core-shell nanoparticles

Xu H., Zalitis C., Rivera-Hernandez M., Albrecht T., Kucernak A., Imperial College London, UK

In this contribution, we focus on the different approaches to dispersing Pt and Co/Pt core/shell nanoparticles in solution and then depositing them on representative catalyst supports. These include gold or highly ordered pyrolytic graphite (HOPG) [...]

In-Situ Nanomechanical-Electrical Testing of One-Dimensional Materials

Yassar R.S., Yap Y.K., Michigan Technological University, US

One-dimensional nanomaterials including nanotubes are building blocks for constructing various complex nanodevices. Boron nitride (BN) nanotubes with structure similar to carbon nanotube are known to be among the strongest insulators in the world. In this [...]

Monolayer to Multilayers Nanostructural Evolution in N type Oligothiphenes: Implications for OFET Performance

Dholakia G.R., Facchetti A., Marks T.J., ELORET NASA Ames Research Center, US

This study elucidates the nature of the interface between the organic semiconductor and source-drain electrodes in OFET devices. The pitted and disordered monolayer results in poor mobilities for bottom contact OFETs. Reorientation of the molecules [...]

Using Electron Tunneling for Direct Sequencing of DNA

Lund J., Dong J., Mehta R., Rahimi M., Ryan D., Parviz B.A., University of Washington, US

Genomic information has assumed a central role in the way biology in general and cell function in particular are understood today. Methods that can sequence DNA rapidly, accurately, and cost-effectively are needed in order to [...]

Education in Nanotechnology through Microscopy Made Easy

Gullo M., Nanosurf AG, CH

An essential goal of education in nanotechnology is an understanding of scale and metrology, of instrumentation and fundamental physics. Easy to use and affordable instrumentation is indispensable in reaching this goal. Nanosurf offers both STM [...]

Scanning Tunneling Microscopy Images of Au Adsorbed on GaAs(111)B surface

Yi H., Kratzer P., Hilner E., Mikkelsen A., KISTI, KR

We have studied the GaAs(111)B surface with Au deposited either homogeneously or as nanoparticles, and found the presence of Au in either form to give rise to a $(sqrt{3} !times! sqrt{3} )$ Au-induced surface reconstruction. [...]

Self-assembled Film of Cholesterol Molecules on the Au (111): An STM Study

Segura A., Batina N., Univesidad Autonoma Metropolitana,Iztapalapa, MX

self-assembled film, cholesterol molecules, Au (111), STM

Preparation of Sb Doped SnO2 SPM Tips and their Use as Transparent Probes in STM Induced Light Hybrid Microscopy

Tätte T., Jacobsen V., Paalo M., Branscheid R., Kreiter M., Mäeorg U., Saal K., Lõhmus A., Kink I., Tartu University, EE

Development of various kinds of sharp needles has been in focus of investigators since their application as sensors in scanning probe microscopy. Although transparent and conductive tips lead to several fascinating applications like STM/SNOM hybrid [...]