Papers – Page 73 – TechConnect Briefs

3D Metrology of sub-60 nm Isolated Lines Using TSOM Optical Method

In the current world of nanotechnology, fast and reliable 3D measurement of nanoscale features is extremely useful. Furthermore, it if the analytical tools used are cost effective and have high throughput–such as optics-based tools. In [...]

Comparison of Anchoring Materials for High Performance Sensors Modified with Nanoparticles and Enzymes

Gao X., Assan D., Lai J.C.K., Leung S.W., Idaho State University, US

We have previously developed some of the most sensitive biosensors/electrodes modified by Au nanoparticles and enzymes that are capable of detecting concentration levels below ppb. These sensors were fabricated with composite layers of nanomaterials and [...]

Synthesis and Characterization of Graphene Thin Films via Hummer’s Method

Thema F.T., Moloto M.J., Nyangiwe N.N., Khenfouch M., Maaza M., Kotsedi L, Dikio E.D., Vaal University of Technology, ZA

Graphene oxide (GO) and reduced graphene oxide (RGO) were synthesized by Hummer’s method and characterized by X-ray diffraction (XRD), Attenuated total reflectance (ATR), Fourier transform infrared spectroscopy (FT-IR), Ultra-violet visible spectroscopy (UV-vis), Atomic Force Microscopy [...]

Experimental Determination of Conduction and Valence Bands of Semiconductor Nanoparticles using Kelvin Probe Force Microscopy

Zhang W., Chen Y., Georgia Institute of Technology, US

Determination of the band gaps (Eg), positions of conduction and valence bands (Ev and Ec) is critical for the understanding of many photochemical processes (e.g., photocatalyst synthesis for decomposing organic compounds or splitting water for [...]

Highly Stable PEGylated Gold Nanoparticles in water: Applications in biology and catalysis

Rahme K., Nolan M.T., Doody T., McGlacken G.P., O’Driscoll C., Holmes J.D., Notre Dame University (NDU), LB

Gold nanoparticles (Au NPs) with diameters ranging between 5-60 nm have been synthesised in water. Functionalised polyethylene glycol-based thiol polymers (mPEG-SH) were used to stabilise the pre-synthesised Au NPs. The grafting density of different PEG [...]

Agglomerates and Aggregates: Number and Size of Primary Particles from in-situ Mass-Mobility Measurements

Eggersdorfer M.L., Gröhn A.J., Sorensen C.M., McMurry P.H., Pratsinis S.E., ETH Zürich, CH

Gas-borne nanoparticles generated at high temperatures undergo coagulation forming agglomerates (physically-bound particles) and aggregates (chemically- or sinter-bound particles). The structure of such particles influences their transport, light scattering, effective surface area and density. Real-time characterization [...]