DE – Page 9 – TechConnect Briefs

Encapsulation of nanoparticles with multifunctional, cross-linkable diblock copolymers for biomedicine

Schmidtke C., Ostermann J., Tran H., Pöselt E., Kloust H., Niehaus J., Becker S., Kreuziger A., Werner K., Pietsch A., Weller H., University of Hamburg, DE

We would like to present a micellular encapsulation method for nanoparticles (quantum dots, iron oxides, gold) which is based on a ligand exchange procedure of native ligands with a prepolymer poly(isoprene)-diethylentriamine (PI-N3) and subsequent ligand [...]

Understanding and Modeling Quasi-Static Capacitance-Voltage Characteristics of Organic Thin-Film Transistors

Ucurum C., Goebel H., Helmut Schmidt University - University of the Federal Armed Forces Hamburg, DE

We have investigated the quasi-static capacitance-voltage (C-V) characteristics of pentacene-based organic thin-film transistors (OTFTs). Beside the hysteresis which is in accordance with previously reported I-V characteristics of OTFTs, the measured C-V characteristics include a plateau [...]

Critical review of CNTFET compact models

Claus M., Haferlach M., Gross D., Technische Universität Dresden, DE

The very recent progress in manufacturing carbon nanotube transistors (CNTFETs) makes these transistors attractive for analog HF circuit applications for which adequate compact models accurately describing the transistor behavior are needed. So far, most models [...]

Squeeze-Film Damping in Perforated Microstructures: Modeling, Simulation and Pressure-Dependent Experimental Validation

Niessner M., Schrag G., Iannacci J., Wachutka G., Münich University of Technology, DE

The reliable estimation of squeeze-film damping (SQFD) is a prerequisite for the design of many microelectromechanical systems (MEMS). The proper operation of several MEMS devices (e.g. accelerometers) often depends crucially on the damping forces, i.e. [...]

Standards of length at the nanoscale based on movement gages and their measurement with sub-nanometric uncertainty

Luskinovich P.N., Zhabotinsky V.A., Lubashevsky I.A., NANOMETER Standard GmbH, DE

The manufacture of nano-electronic devices, nano manipulators, and microelectromechanical sensors, as well as elaborations of nano-technological processes with atomic spatial resolution have made it necessary to calibrate measuring devices at the nanoscale with sub-nanometric error. [...]

Nanoscale deformation analysis for fracture mechanical evaluation of interface cracks in electronic packages

Keller J., Schulz M., Mrossko R., Wunderle B., Michel B., AMIC Angwandte Micro-Messtechnik GmbH, DE

The ongoing development of highly integrated electronic packages leads to a steadily increasing number of material interfaces within a package. In combination with increasing harshness (vibration, humidity, temperature) of the system environment the reliability of [...]

Optimised Piezoelectric PZT Thin Film Production on 8” Silicon Wafers for Micromechanical Applications

Kaden D., Gu-Stoppel S., Quenzer H.-J., Kaltenbacher D., Wagner B., Dudde R., Fraunhofer Inst. Silicon Technology, DE

Piezoelectric materials are of great interest for powerful actuation in MEMS devices. Due to its large electromechanical coupling coefficient Lead Zirconate Titanate (PZT) is one of the most favourable materials for realisation of fast and [...]

FreeNano – Test Methods for Release of Pigment-Nanoparticles Into the Environment at the End of Life Cycle

Stintz M., TU Dresden, DE

Several coatings with and without nanoscaled additives and pigments were exposed to artificial aging and weathering, before they experienced a mechanical treatment by sanding with process parameters similar to professional sanding condition. The miniature sanding [...]

Pulsed laser generation of clean colloidal metal nanoparticles

Bärsch N., Bartke D., Barcikowski S., Particular GmbH, DE

In contrast to colloidal chemistry, pulsed laser ablation in liquids is a physical process that generates nanoparticles e.g. from precious metals or alloys directly in water or organic solvents. Zeta potential values up to -80 [...]

A simple approach for the synthesis of anisometric particles by electrospinning

Friedemann K., Max-Planck-Institut for Polymer Research Mainz, DE

We developed a new and simple approach to fabricate large amounts of anisometric particles via controlled fragmentation of electrospun composite nanofibers. Polystyrene nanoparticles were embedded as void precursors in silica fibers by electrospinning of mixed [...]