Sökning: "surface potential decay"

Visar resultat 16 - 20 av 38 avhandlingar innehållade orden surface potential decay.

1. 16. Nanoplasmonics for Absorption Engineering and Hydrogen Sensing

   Författare :Carl Wadell; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; palladium; hydrogen storage; absorption engineering; nanoplasmonic sensing; nanosize effects; plasmon enhanced chemistry; Localized surface plasmon resonance;

   Sammanfattning : When light interacts with metallic nanoparticles smaller than its wavelength it can excite a collective oscillation of the conduction electrons that gives rise to efficient light absorption and scattering. Moreover, locally strongly enhanced electric fields are created around the particles. LÄS MER

3. 17. Probing nanoscale phenomena with nanoplasmonic sensors

   Författare :Francesco Mazzotta; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Sintering; Nanopores; Localized surface plasmon resonance; Biosensor; Catalysis; Nanoplasmonics; Nanodisks; Nanofabrication;

   Sammanfattning : The development of the modern society is strongly influenced by the improved possibility to integrate sensing technology into traditional devices. The development of smaller, more efficient and integrated sensors have already transformed traditional business areas, such as healthcare with the introduction of e-health and portable diagnostics. LÄS MER

4. 18. Numerical study of dynamics of mass-emitting particles in multi-phase flow

   Författare :Zeinab Moradi Nour; Minh Do-Quang; Fredrik Lundell; Gustav Amberg; Hans Kuipers; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; particles with outflow; lattice Boltzmann method; particle interaction; liquid-gas-solid systems; sedimentation; shear flow; Engineering Mechanics; Teknisk mekanik;

   Sammanfattning : Suspended particles can be found in wide range of industrial applications such as food industry, mining industry and energy conversion processes. Depending on flow cases which particles are involved, different dynamics and motions are expected from suspended particles. LÄS MER

5. 19. Synthesis and Characterization of ZnO Nanostructures

   Författare :Li Li Yang; Qingxiang Zhao; Magnus Willander; Jinghai Yang; Noel Magnea; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Zinc oxide; nanostructures; heterostructures; controllable growth; optical properties; postannealing; diffusion coefficient; Semiconductor physics; Halvledarfysik;

   Sammanfattning : One-dimensional ZnO nanostructures have great potential applications in the fields of optoelectronic and sensor devices.  Therefore, it is very important to realize the controllable growth of one-dimensional ZnO nanostructures and investigate their properties. LÄS MER

7. 20. Electrical Characterization of Partial Discharge Resistant Enamel Insulation

   Författare :Tuan Anh Hoang; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Enamel wire insulation; dipolar polarization; charge injection; charge transport; chromium oxide; dc conductivity; partial discharge; twisted pair.; dielectric permittivity;

   Sammanfattning : Adjustable speed drives for rotating machines have become increasingly popular as they provide possibilities of smooth and accurate process control as well as for energy savings. In such systems, due to the fact that the voltage applied at terminals of motor windings is no longer purely sinusoidal but characterized by a high content of harmonics, the appearing electrical and thermal stresses yield premature failures of the winding insulation, mainly because of an increased partial discharge (PD) activity. LÄS MER