Browsing Physics by Title
Now showing items 1657-1676 of 2104
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Sampled grating DBR laser as a spectroscopic source in multigas detection at 1.52-1.57um
(2001)The first application is reported of multigas sensing using a widely tuneable sampled grating DBR laser with a tuning range 1520⩽?⩽1570 nm. The laser diode consists of four independently biased sections, two sampled ... -
Scalable production of large quantities of defect-free few-layer graphene by shear exfoliation in liquids
(2014)In order to progress from the lab to commercial applications it will be necessary to develop industrially scalable methods to produce large quantities of defect-free graphene. Here we show that high-shear mixing of graphite ... -
Scanning near-field microscopy of microwave circuits
(Trinity College (Dublin, Ireland). School of Physics, 2002)The topic of this thesis is the development and testing of measurement techniques for high resolution imaging of the field induced by microwave circuits in the near-field region. The theoretical aspects of the near-field ... -
"Scattered surface charge density: A tool for surface characterization"
(2011)We demonstrate the use of nonlocal scanning tunneling spectroscopic measurements to characterize the local structure of adspecies in their states where they are significantly less perturbed by the probe, which is accomplished ... -
Science and technology roadmap for graphene, related two-dimensional crystals, and hybrid systems
(2015)We present the science and technology roadmap for graphene, related two-dimensional crystals, and hybrid systems, targeting an evolution in technology, that might lead to impacts and benefits reaching into most areas of ... -
Search for 1-10 Hz Modulations in Coronal Emission with SECIS during the August 11, 1999 Eclipse
(EDP Sciences, 2004)Results of the search of the periodic changes of the 530.3 nm line intensity emitted by selected structures of the solar corona in the frequency range 1-10 Hz are presented. A set of 12 728 images of the section of the ... -
Search for alternative magnetic tunnel junctions based on all-Heusler stacks
(2018)By imposing the constraints of structural compatibility, stability, and a large tunneling magneto-resistance, we have identified the Fe3Al/BiF3/Fe3Al stack as a possible alternative to the well-established FeCoB/MgO/FeCoB ... -
Search for magnets with properties intermediate between Nd-Fe-B and Ferrite
The rare earth elements neodymium, samarium, terbium and dysprosium are predominantly mined in China (>95%) there wild prices fluctuations in 2011 as a result of Chinese government policies undermined confidence in the ... -
Searching for signatures of electromagnetic cascades in the intergalactic medium initiated by blazars
(Trinity College (Dublin, Ireland). School of Physics, 2012)Very high energy (VHE) y-ray astronomy has opened a new window into the Universe at the highest energies, allowing the exploration of unique astrophysical phenomena. This thesis constitutes an observational contribution ... -
Selecting the tip electron orbital for scanning tunneling microscopy imaging with sub-?ngstrom lateral resolution
(Institute of Physics, 2010)We report on scanning tunneling microscopy (STM) studies performed with single crystalline W[001] tips on a graphite(0001) surface. Results of distance-dependent STM experiments with sub-?ngstrom lateral resolution and ... -
Selective electrochemical production of hydrogen peroxide at zigzag edges of exfoliated molybdenum telluride nanoflakes
(2020)The two-electron reduction of molecular oxygen represents an effective strategy to enable the green, mild and on-demand synthesis of hydrogen peroxide. Its practical viability, however, hinges on the development of advanced ... -
Selective gene fishing in complex genomic environments using micro-cantilevers : applications in RNAi therapy
(Trinity College (Dublin, Ireland). School of Physics, 2012)Genes and their role in disease origins and proliferation have been of great interest for molecular medicine. Their functions and roles have been recently shown to be moderated by RNA interference (RNAi), a natural phenomenon ... -
Self-assembled arrays of magnetic nanostructures on morphologically patterned semiconductor substrates
(Trinity College (Dublin, Ireland). School of Physics, 2014)This thesis deals with the formation of morphological patterns on single-crystal semi-conductor surfaces via self-assembly processes, followed by the subsequent fabrication of magnetic nanostructures whose dimensions are ... -
Self-assembled broadband plasmonic nanoparticle arrays for sensing applications
(2012)Highly ordered noble metal nanoparticle (NP) arrays are produced using a glancing angle deposition on stepped substrates. The versatility of the technique is demonstrated by depositing different metals, resulting in shifts ... -
Self-assembled Fe nanodots on Ge (001)
(2006)The initial nucleation of Fe onto the (2x1) reconstructed Ge(001) surface is studied. Uniformly sized two-dimensional Fe dots are shown to nucleate. They have an apparent corrugation height similar to 1.1 A and lateral ...