Browsing Physics (Scholarly Publications) by Author "Gounko, Iouri"
Now showing items 1-17 of 17
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Characterising and control of ammonia emission in microbial fuel cells
Shvets, Igor; Gounko, Iouri; Lyons, Michael; Xiao, Liwen; Li, Dunzhu (2020)The serious ammonia (NH3) emission of air-cathode microbial fuel cells (MFCs) was reported but how to control and mitigate the emission hasn’t been well studied. Considering the importance of the issue for the application ... -
Concentration dependence of Forster resonant energy transfer between donor and acceptor nanocrystal quantum dot layers: Effect of donor-donor interactions
Gounko, Iouri; Bradley, Louise (2011)The influences of donor and acceptor concentrations on Forster resonant energy transfer (FRET) in a separated donor-acceptor quantum dot bilayer structure have been investigated. Donor intra-ensemble energy transfer is ... -
Effect of metal nanoparticle concentration on localized surface plasmon mediated Förster resonant energy transfer
Bradley, Louise; Gounko, Iouri (2012)The influence of gold nanoparticle concentration on signatures of localized surface plasmon mediated Förster resonant energy transfer is investigated in a quantum dot–gold nanoparticle sandwich structure. At lower gold ... -
Emission Properties of Colloidal Quantum Dots on Polyelectrolyte Multilayers
Bradley, Louise; Gounko, Iouri (2006)We present steady state and time-resolved photoluminescence (PL) characteristics of differently charged CdTe quantum dots (QDs) adsorbed onto a polyelectrolyte (PE) multilayer. The PE multilayer is built up using a ... -
Energy transfer in colloidal CdTe quantum dot nanoclusters
Bradley, Louise; Gounko, Iouri (2010)Quantum dot (QD) nanoclusters were formed using oppositely charged colloidal CdTe QDs, of two different sizes, mixed in aqueous solutions. The photoluminescence (PL) spectra and time-resolved PL decays show signatures of ... -
Enhanced quantum efficiency in mixed donor-acceptor nanocrystal quantum dot monolayers
Gounko, Iouri; Bradley, Louise (2011)Colloidal nanocrystal quantum dots have attracted interest for use in light-harvesting and emitting devices. One of the key parameters for such applications is the quantum efficiency. Nanocrystal quantum dots exhibit reduced ... -
Enhancing Forster nonradiative energy transfer via plasmon interaction
Gounko, Iouri; Bradley, Louise (2016) -
Experimental and Theoretical Investigation of the Distance Dependence of Localized Surface Plasmon Coupled Forster Resonance Energy Transfer
Gounko, Iouri; Bradley, Louise (2014)The distance dependence of localized surface plasmon (LSP) coupled Förster resonance energy transfer (FRET) is experimentally and theoretically investigated using a trilayer structure composed of separated monolayers of ... -
Influence of intra-ensemble energy transfer on the properties of nanocrystal quantum dot structures and devices
Gounko, Iouri; Bradley, Louise (2010)The impact of intra-ensemble Forster resonant energy transfer (FRET) on the optical properties of monodispersed quantum dot (QD) monolayers and a donor/acceptor FRET bilayer structure are presented. The QD structures are ... -
Influence of localised surface plasmons on energy transfer between quantum dots
Gounko, Iouri; Bradley, Louise (IEEE Computer Society, 2010)The effects of surface plasmons (SPs) on Forster resonant energy transfer (FRET) in colloidal quantum dot (QD) structures have been investigated. CdTe QDs of two different sizes acted as donors and acceptors in a mixed ... -
Influence of quantum dot concentration on F?rster resonant energy transfer in monodispersed nanocrystal quantum dot monolayers
Gounko, Iouri; Bradley, Louise (2010)The quantum dot (QD) concentration dependence of the optical properties of QD monolayers is shown to be dominated by Forster resonant energy transfer (FRET) from smaller to larger QDs in the ensemble. With increasing QD ... -
Large Energy Transfer Distance to a plane of Gold Nanoparticles
Gounko, Iouri; Bradley, Louise (2012)The quenching of emission in proximity to metallic surfaces via non-radiative energy transfer is studied for sensing applications. It can also be used for the measurement of distances on the nanoscale. We report on energy ... -
Modification of the FRET rate in quantum dot structures
Gounko, Iouri; Bradley, Louise (2011)Förster resonant energy transfer (FRET) can be applied to create energy flow on the nano-scale for light harvesting, colour conversion or sensing applications. The performance of such devices depends on the efficiency of ... -
Surface Plasmon Enhanced Energy Transfer between Donor and Acceptor CdTe Nanocrystal Quantum Dot Monolayers
Bradley, Louise; Gounko, Iouri (2011)Surface plasmon enhanced Förster resonant energy transfer (FRET) between CdTe nanocrystal quantum dots (QDs) has been observed in a multilayer acceptor QD–gold nanoparticle–donor QD sandwich structure. Compared to a ... -
Surface plasmon enhanced F?rster resonance energy transfer between the CdTe quantum dots
Gounko, Iouri; Bradley, Louise (2008)Forster resonance energy transfer (FRET) between CdTe quantum dots (QDs) at nanoscale proximity to gold nanoparticle (Au NP) layers is investigated experimentally. We have observed the enhancement in the acceptor QDs' ... -
Two-dimensional Förster resonant energy transfer in a mixed quantum dot monolayer: Experiment and theory
Gounko, Iouri; Bradley, Louise (2009)Energy transfer in monolayers of CdTe quantum dots (QDs), comprised of QDs of two different sizes, has been investigated. Förster resonant energy transfer (FRET) from QD donors to QD acceptors was observed and characterized ... -
Wavelength, concentration, and distance dependence of nonradiative energy transfer to a plane of gold nanoparticles.
Bradley, Louise; Gounko, Iouri (2012)Nonradiative energy transfer to metal nanoparticles is a technique used for optical-based distance measurements which is often implemented in sensing. Both Förster resonant energy transfer (FRET) and nanometal surface ...