1,721,091 research outputs found
Photopolymerization of acrylic oligomers and photolithographic processes for the fabrication of microfluidic devices
No full textElectrothermal modelling for EIBJ nanogap fabrication
No full textFabrication of electrodes with a controlled nanometric separation is strategic for many application fields as molecular electronics and biosensors. A technological process at room temperature with an high yield can be defined starting from electromigration induced break junction technique (EIBJ). A self assembly adhesion molecule (MPTMS (3-mercaptopropyl)trimethoxysilane) for gold, efficiently used in previous works, solves the problems of metallic residuals, typical of titanium and chromium. As a consequence a simple and low cost technological process to realise gold nanogaps at room temperature becomes feasible. The analysis of internal mechanisms that act on metal wire, when the density produces electromigration, together with a thermal model of the wire itself, can be used to control nanogap dimension. The design of a large set of wires, where different geometries are used to modify their thermal behaviour during electromigration, is used to verify feedback algorithms to control applied bias voltage. Some interesting experimental results seem to confirm the model proposed by the authors, opening new opportunities for future high yield nanogap fabrication
Current and Future Nanotech Applications in the Oil Industry
Full text linkProblem statement: Nanotech applications in the oil industry are not completely new: nanoparticles have been successfully used in drilling muds for the past 50 years. Only recently all the other key areas of the oil industry, such as exploration, primary and assisted production, monitoring, refining and distribution, are approaching nanotechnologies as the potential Philosopher's stone for facing critical issues related to remote locations (such as ultra-deep water and artic environments), harsh conditions (high-temperature and high-pressure formations), nonconventional reservoirs (heavy oils, tight gas, tar sands). The general aim is to bridge the gap between the oil industry and nanotechnology community using various initiatives such as consortia between oil and service companies and nanotechnology excellence centres, networking communities, workshops and conferences and even dedicated research units inside some oil companies. Quite surprisingly, even if a lot of discussion is taking place, no substantial research on these topics is currently being undertaken around the world by the petroleum industry. A very different attitude is demonstrated by other industries and the advances they achieved are outstanding. Approach: This study provides an overview of the most interesting nanotechnology applications and critically highlights the potential benefits that could come from transposing the same-or adapted-solutions to the oil industry. Results/Conclusion: As extensively illustrated, some technologies which are already available off-the-shelf can offer real improvements in dealing with some specific issues of the oil industry. Other technologies can require further elaboration before direct use, but their potential is enormous
DISPOSITIVI MICROFLUIDICI PER APPLICAZIONE IN CAMPO BIOMEDICALE, FABBRICATI IN MATERIALE POLIMERICO COMPOSITO
Full text linkLa presente invenzione si riferisce a sistemi e/o dispositivi miniaturizzati di tipo microfluidico, in particolare del tipo denominato con il termine Lab-On-Chip, utilizzati per applicazioni biomedicali e simil
- …
