Browsing Physics (Scholarly Publications) by Title
Now showing items 1347-1366 of 1691
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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 tunneling microscopy studies of the Fe3O4(001) surface using antiferromagnetic probes
(2003)We have studied the (001) surface of a Fe3O4 single crystal using low-energy electron diffraction (LEED), Auger electron spectroscopy (AES) and scanning tunneling microscopy (STM). The STM measurements were performed using ... -
Scanning tunneling spectroscopy study of the electronic structure of Fe3O4 surfaces
(2006)Scanning tunneling spectroscopy (STS) experiments were performed on the (001) and (111) surfaces of single crystalline magnetite. Room temperature spectra exhibit a ~0.2 eV gap around Ef. The importance of perfect surface ... -
"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 ... -
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 ... -
Self-assembled alkali and alkaline earth metal nanopatterns on Fe3O4(001)
(2004)We have studied the mechanism of nanopattern formation by self-assembly of impurities aggregated on the Fe3O4(001) surface. Self-assembly was controlled by thermal diffusion from the bulk of natural and artificial single ... -
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 ... -
Self-assembled templates for the generation of arrays of 1-dimensional nanostructures: From molecules to devices
(Elsevier, 2010)Self-assembled nanoscale porous architectures, such as mesoporous silica (MPS) films, block copolymer films (BCP) and porous anodic aluminas (PAAs), are ideal hosts for templating one dimensional (1D) nano-entities for a ... -
Self-Assembly and Ordering of C-60 on the WO2/W(110) Surface
(2011)The growth and ordering of C60 molecules on the WO2/W(110) surface have been studied by low-temperature scanning tunnelling microscopy and spectroscopy (STM and STS), low-energy electron diffraction (LEED) and density ... -
Self-Assembly of Atomically Thin Chiral Copper Heterostructures Templated by Black Phosphorus
(2019)The fabrication of 2D systems for electronic devices is not straightforward, with top‐down low‐yield methods often employed leading to irregular nanostructures and lower quality devices. Here, a simple and reproducible ... -
Self-assembly of Fe nanocluster arrays on templated surfaces
(2012)The growth of Fe nanoclusters on the Ge(001) and MoO2/Mo(110) surfaces has been studied using low-temperature scanning tunneling microscopy (STM) and X-ray magnetic circular dichroism (XMCD). STM results indicate that ... -
Self-assembly of iron nanoclusters on the Fe3O4(111) superstructured surface
(2005)We report on the self-organized growth of a regular array of Fe nanoclusters on a nanopatterned magnetite surface. Under oxidizing preparation conditions, the s111d surface of magnetite exhibits a regular superstructure with ... -
Self-limited growth of triangular PtO2 nanoclusters on the Pt(111) surface
(2010)The high temperature oxidation of the Pt(111) surface by molecular oxygen has been studied using scanning tunnelling microscopy (STM) and low-energy electron diffraction (LEED). Results indicate a self-limited growth of ...
