Sökning: "platinum"

Visar resultat 31 - 35 av 72 uppsatser innehållade ordet platinum.

  1. 31. Using gallium nitride nanowires as STM probes

    Kandidat-uppsats, Lunds universitet/Synkrotronljusfysik; Lunds universitet/Fysiska institutionen

    Författare :Karolis Sulinskas; [2018]
    Nyckelord :STM; STS; Nanowire; GaN; InAs; Semiconductors; Physics and Astronomy;

    Sammanfattning : Gallium nitride (GaN) nanowires grown using catalyst-free metal organic vapor phase epitaxy were used as scanning tunneling microscope (STM) probes. The probes were prepared by placing a GaN nanowire on a tungsten STM probe using a nanomanipulator in a scanning electron microscope (SEM) and welding them together using an electron beam induced platinum deposition. LÄS MER

  3. 32. Degradation of Microplastic Residuals in Water by Visible Light Photocatalysis

    Master-uppsats, KTH/Hållbar utveckling, miljövetenskap och teknik

    Författare :Tajkia Syeed Tofa; [2018]
    Nyckelord :Microplastics; Low density Polyethylene LDPE ; Heterogeneous photocatalytic degradation; Zinc oxide nanorods; Visible light.;

    Sammanfattning : Microplastic (MP) pollution has recently been recognized as a threat to the biosphere including humans due to its widespread distribution, persistent nature and infinitesimal size. This study focused on the solid phase degradation of microplastic residues (particularly low density polyethylene, LDPE) in water through heterogeneous photocatalysis process by designed photocatalysts of zinc oxide nanorods (ZnO NRs) and platinum nanoparticles deposited on zincoxide nanorods (Pt NPs-ZnO NRs) under visible light irradiation. LÄS MER

  4. 33. The Role of Gold in an Investment Portfolio : An empirical study on diversification benefits of gold from the perspective of Swedish investors

    Uppsats för yrkesexamina på avancerad nivå, Umeå universitet/Företagsekonomi

    Författare :Nelly Fernando; [2017]
    Nyckelord :Gold; Investment Portfolio;

    Sammanfattning : Human interaction with gold can be traced far back in history, and throughout history, the metal has been both worshipped and fought for. People almost intuitively place a high value on this yellow metal and gold has always had a special place in the human heart. LÄS MER

  5. 34. Evaluation of Amyloid Fibrils as Templates for Photon Upconversion by Sensitized Triplet-Triplet Annihilation

    Kandidat-uppsats, KTH/Skolan för kemivetenskap (CHE)

    Författare :Sharon Berkowicz; Helena Olsson; Henrik Broberg; [2017]
    Nyckelord :photon upconversion; sensitized triplet-triplet annihilation; anti-stokes emission; amyloid fibrils; whey protein;

    Sammanfattning : In the face of global warming and shrinking resources of fossil fuels the interest in solar energy has increased in recent years. However, the low energy and cost efficiency of current solar cells has up to this date hindered solar energy from playing a major role on the energy market. LÄS MER

  7. 35. Development of microelectrodes for electrical measurements in a microfluidic system

    Master-uppsats, Lunds universitet/Avdelningen för Biomedicinsk teknik

    Författare :Emma Thomée; [2017]
    Nyckelord :Technology and Engineering;

    Sammanfattning : Transendothelial electrical resistance (TEER) measurements are used to quantitatively monitor cell barrier formation in in vitro models of the blood-brain barrier. TEER measurements in microfluidic in vitro systems are technically problematic and have suffered from poor measurement reproducibility. LÄS MER