Papers – Page 15 – TechConnect Briefs

Curvilinear Waveforms for Fluid Dispensing

Clark J., Zebra Technologies, US

Piezoelectric micropipettes, a type of drop -on-demand ink jet microdispenser, are typically driven by repetitively pulsed waveforms to cause fluid ejection through a small orifice. To study the effect of drive waveform shape on drop [...]

Electrohydrodynamic Micro-droplet Generation on Both Conducting and Non-conducting Surfaces by Electric Induction

Lee B-S, Lee J-G, Lee B-S, Lee J-G, Cho H.-J., Huh N., Ko C., Samsung Advanced Institute of Technology, KR

There is a rapid growing need of the drop-based delivery of small quantities of bio-functional materials, such as cells. We report a brand-new printing method to generate a single droplet in the range of pL [...]

Carbon nanotube/fused silica composite with gradient structure and carbon fiber/ fused silica back reflection layers for microwave absorbing application

Zhu Y., Pan Y.B., Guo J.K., Chinese Academy of Sciences, CN

Many investigations have been made to the carbon nanotube (CNT)/pure silica (SiO2) composites for their attractive properties. Our primary work demonstrates the decrease of reflection at interface and the improvement of microwave absorbing efficiency in [...]

From Electrical to Fuel Powered Artificial Muscles

Kozlov M.E., Oh J., Mirfakhrai T., Zhang M., Fang S., Ferraris J.P., Madden J.D.W., Baughman R.H., University of Texas at Dallas, US

A number of materials ranging from carbon nanotube yarns and sheets to shape memory alloys (SMA) have been explored for the application in the area of artificial muscles (actuators). It was found that if powered [...]

Nanotube Grafting in Porous Solids for High Surface Devices

Mukhopadhyay S.M., Karumuri A., Barney I.T., Wright State University, US

Biological systems make use of hair and capillary type hierarchical structures to create more surface area in limited space, but very few synthetic materials use this concept. Geometrical calculations show that if hierarchical substrates are [...]

Preparation and Electrochemical Characterization of Porous SWNT-PPy Nanocomposite Sheets for Supercapacitor Applications

Oh J., Kozlov M.E., Baughman R.H., University of Texas at Dallas, US

Highly porous sheets comprised of Single Walled Carbon Nanotubes and doped polypyrrole (SWNT-PPy) were prepared by vacuum filtration of SWNT-PPy methanol dispersions. The employed preparation procedure is an extension of conventional bucky-paper fabrication method for [...]

Influence of MWNT on the physical properties of polyethylene nanocomposites

Ciambelli P., Sarno M., Neitzert H.C., Nobile M.R., Somma E., Valentino O., University of Salerno, IT

Physical properties of a series of multi-walled carbon nanotube-high density polyethylene (MWNT-HDPE) composites, prepared by melt mixing in a micro-twin screw extruder, were investigated. The effect of MWNT concentration (0.5-7 wt%) and nanotube surface treatment [...]

Tribological properties of carbon nanotubes as lubricant additives

Abate F., Senatore A., D’Agostino V., Leone C., Sarno M., Ciambelli P., University of Salerno, IT

Tribological performances of innovative lubricant additives based on IF-WS2 and other transition metal dichalcogenides like MoS2 nanoparticles have been widely investigated in recent years. The boundary lubrication regime is the main target for the benefits [...]

Predicting PEMFC Pt Catalyst Durability using DFT

Groves M.N., Chan A., Malardier-Jugroot C., Jugroot M., Malardier-Jugroot C., Royal Military College of Canada, CA

DFT calculations using B3LYP/Lanl2DZ on nitrogen doped graphene and single walled carbon nanotube structures are evaluated using Gaussian03 to measure the binding energy between its surface and a Pt atom. This is to characterize the [...]

Carbon nanotube-reinforced epoxy nanocomposites for mechanical property improvement

Mao D., Yaniv Z., Fink R., Johnson L., Applied Nanotech, Inc., US

Through proper functionalization of the surface of CNTs, covalent bonds can be formed with the epoxy matrix. In addition, by breaking the van de waals force, CNTs can be well dispersed in the epoxy matrix [...]