Imperial College London
Alternate

Professor Jason Riley

Faculty of Engineering, Department of Materials

Vice-Dean (Education) for the Faculty of Engineering
 
 
 
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Contact

 

+44 (0)20 7594 6751jason.riley

 
 
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Location

 

B3.37Bessemer BuildingSouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
to

113 results found

King LA, Zhao W, Danos L, Riley DJet al., 2014, Activation of CdSe Quantum Dots after Exposure to Polysulfide, JOURNAL OF PHYSICAL CHEMISTRY C, Vol: 118, Pages: 14555-14561, ISSN: 1932-7447

Journal article

Yaacob KA, Riley DJ, 2014, Anodic Electrophoretic Deposition of TiO<sub>2</sub> Nanoparticles Synthesized Using Sol Gel Method, International Conference on Nanoscience and Nanotechnology (NANO-SciTech 2013), Publisher: TRANS TECH PUBLICATIONS LTD, Pages: 633-+, ISSN: 1022-6680

Conference paper

Yaacob KA, Riley DJ, 2013, Formation of MUA (mercaptoundeconic acid)-capped CDSe nanoparticle films by electrophoretic deposition, CERAMICS INTERNATIONAL, Vol: 39, Pages: 8797-8803, ISSN: 0272-8842

Journal article

Zuehlsdorff TJ, Hine NDM, Spencer JS, Harrison NM, Riley DJ, Haynes PDet al., 2013, Linear-scaling time-dependent density-functional theory in the linear response formalism, JOURNAL OF CHEMICAL PHYSICS, Vol: 139, ISSN: 0021-9606

Journal article

King LA, Zhao W, Chhowalla M, Riley DJ, Eda Get al., 2013, Photoelectrochemical properties of chemically exfoliated MoS2, Journal of Materials Chemistry A

Chemically exfoliated monolayers of molybdenum disulfide (MoS2) are shown to be photoelectrochemically active and stable, highlighting the unexplored potential of 2D-crystals in photoelectrochemistry.

Journal article

Xie F, Pang J, Centeno A, Ryan M, Riley J, Alford Net al., 2013, Nanoscale control of Ag nanostructures for plasmonic fluorescence enhancement of near-infrared dyes, Nano Research, Vol: 6, Pages: 495-510, ISSN: 1998-0124

Potential utilization of proteins for early detection and diagnosis of various diseases has drawn considerable interest in the development of protein-based detection techniques. Metal induced fluorescence enhancement offers the possibility of increasing the sensitivity of protein detection in clinical applications. We report the use of tunable plasmonic silver nanostructures for the fluorescence enhancement of a near-infrared (NIR) dye (Alexa Fluor 790). Extensive fluorescence enhancement of ∼2 orders of magnitude is obtained by the nanoscale control of the Ag nanostructure dimensions and interparticle distance. These Ag nanostructures also enhanced fluorescence from a dye with very high quantum yield (7.8 fold for Alexa Fluor 488, quantum efficiency (Qy) = 0.92). A combination of greatly enhanced excitation and an increased radiative decay rate, leading to an associated enhancement of the quantum efficiency leads to the large enhancement. These results show the potential of Ag nanostructures as metal induced fluorescence enhancement (MIFE) substrates for dyes in the NIR “biological window” as well as the visible region. Ag nanostructured arrays fabricated by colloidal lithography thus show great potential for NIR dye-based biosensing applications.

Journal article

Xu N, Riley DJ, 2013, Nonlinear analysis of a classical system: The Faradaic process, ELECTROCHIMICA ACTA, Vol: 94, Pages: 206-213, ISSN: 0013-4686

Journal article

Xie F, Centeno A, Zou B, Ryan MP, Riley DJ, Alford NMet al., 2013, Tunable synthesis of ordered Zinc Oxide nanoflower-like arrays, JOURNAL OF COLLOID AND INTERFACE SCIENCE, Vol: 395, Pages: 85-90, ISSN: 0021-9797

Journal article

Orsi A, Riley DJ, 2013, Influence of Stress on Aluminum Anodization and Pore Ordering, JOURNAL OF THE ELECTROCHEMICAL SOCIETY, Vol: 160, Pages: D10-D12, ISSN: 0013-4651

Journal article

Xie F, Centeno A, Ryan MR, Riley DJ, Alford NMet al., 2013, Au nanostructures by colloidal lithography: from quenching to extensive fluorescence enhancement, J. Mater. Chem. B, Vol: 1, Pages: 536-543

Enhanced local electric fields are created by nanoparticles when pumped at wavelengths corresponding to Localised Surface Plasmon Resonance (LSPR) modes, leading to Metal Induced Fluorescence Enhancement (MIFE). This paper describes the fluorescent enhancement due to reproducible and tuneable Au nanostructures on glass substrates fabricated over large areas by colloidal lithography. Interparticle separation, particle resonance, and the fluorescent dye properties (quantum yield and emission/excitation wavelengths) are all important factors influencing the fluorescent enhancement. A maximum fluorescence enhancement of 69 times from near infra-red (NIR) dye Alexa Fluor[registered sign] 790 was observed.

Journal article

Wagstaffe SJ, Hill KE, Williams DW, Randle BJ, Thomas DW, Stephens P, Riley DJet al., 2012, Bispecific Antibody-Mediated Detection of the <i>Staphylococcus aureus</i> Thermonuclease, ANALYTICAL CHEMISTRY, Vol: 84, Pages: 5876-5884, ISSN: 0003-2700

Journal article

Cook JP, Riley DJ, 2012, Electrical switching of microgel swelling and collapse for display applications, JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, Vol: 50, Pages: 516-522, ISSN: 0887-6266

Journal article

Cook JP, Riley DJ, 2012, pH induced swelling of PVP microgel particles - A first order phase transition?, JOURNAL OF COLLOID AND INTERFACE SCIENCE, Vol: 370, Pages: 67-72, ISSN: 0021-9797

Journal article

King LA, Riley DJ, 2012, Importance of QD Purification Procedure on Surface Adsorbance of QDs and Performance of QD Sensitized Photoanodes, JOURNAL OF PHYSICAL CHEMISTRY C, Vol: 116, Pages: 3349-3355, ISSN: 1932-7447

Journal article

Tan KS, Riley J, 2012, Synthesis of Various Shapes of Titanate Nanoparticles via Hydrothermal Reaction, International Conference on Nanotechnology - Research and Commercialization (ICONT), Publisher: AMER INST PHYSICS, Pages: 97-114, ISSN: 0094-243X

Conference paper

Xu N, Riley J, 2011, Nonlinear analysis of a classical system: The double-layer capacitor, ELECTROCHEMISTRY COMMUNICATIONS, Vol: 13, Pages: 1077-1081, ISSN: 1388-2481

Journal article

Illy BN, Cruickshank AC, Schumann S, Campo RD, Jones TS, Heutz S, McLachlan MA, McComb DW, Riley DJ, Ryan MPet al., 2011, Electrodeposition of ZnO layers for photovoltaic applications: controlling film thickness and orientation, Journal of Materials Chemistry

Journal article

Illy BN, Cruickshank AC, Da Campo R, Schumann S, Jones TS, Heutz SEM, McLachlan MA, McComb DW, Riley DJ, Ryan MPet al., 2011, Electrodeposition of ultrathin ZnO buffer layers with controllable orientation for photovoltaic applications, ISSN: 0065-7727

ZnO is one of the most promising materials for applications in nanotechnology due to its large band gap and high electron mobility. A large amount of work has focused on the study of nanostructured ZnO. However, two dimensional transparent compact layers are also of great interest as transparent conductive oxides in optoelectronic devices. Compact ZnO layers are usually deposited by methods which are generally costly thus significantly limiting their potential application. Electrodeposition is a low cost alternative, offering a high degree of control on the characteristics. In this work the effects of the deposition parameters on the film characteristics have been studied in order to fabricate the thinnest electrodeposited films ever reported and to tune the crystallographic orientation. Incorporation of the layer into an organic ZnO/P3HT:PCBM solar cell is used to demonstrate how a careful control of the orientation can dramatically improve the photovoltaic device efficiency.

Conference paper

Cruickshank A, Tay S, Illy B, Dearden C, Jones TS, McLachlan MA, McComb DW, Riley DJ, Heutz S, Ryan MPet al., 2011, Electrodeposition of ZnO Nanostructures on Molecular Thin Films, Chemistry of Materials, Vol: 23, Pages: 3863-3870, ISSN: 1520-5002

Electrodeposition of highly crystalline ZnO nanostructures directly onto copper phthalocyanine and pentacene thin films, from aqueous solutions containing zinc nitrate and dissolved oxygen, has been successfully demonstrated for the first time using a two-step electrochemical deposition process. Importantly, surface activation of the molecular thin film substrates by depositing a thin layer of ZnO nanoparticles at high cathodic overpotentials prior to film growth was found to be crucial for achieving a dense coverage of ZnO nanostructures with uniform morphology. The mechanism for ZnO deposition via electroreduction of hydroxide precursor species (oxygen and NO3– ions) at the organic-electrolyte interface was shown to be analogous to that reported for conventional inorganic and metal electrodes. Comparison of cathodic current density-time curves, measured during deposition, with film orientation and morphology revealed that the cathodic current density and number of nucleation sites are key factors in determining the characteristics of ZnO film growth on organic substrates. Significantly, the CuPc and pentacene films are not damaged or degraded during this process.

Journal article

Moser D, Baldissin G, Bull DJ, Riley DJ, Morrison I, Ross DK, Oates WA, Noreus Det al., 2011, The pressure-temperature phase diagram of MgH<sub>2</sub> and isotopic substitution, JOURNAL OF PHYSICS-CONDENSED MATTER, Vol: 23, ISSN: 0953-8984

Journal article

Schumann S, Campo RD, Illy B, Cruickshank AC, McLachlan MA, Ryan MP, Riley DJ, McComb DW, Jones TSet al., 2011, Inverted organic photovoltaic devices with high efficiency and stability based on metal oxide charge extraction layers, Journal of Materials Chemistry, 2011, Pages: 2381-2386

A substantial increase in device performance and operational stability in solution processed inverted bulk heterojunction (BHJ) organic photovoltaic devices (OPV) is demonstrated by introducing a zinc oxide (ZnO) interlayer between the electron collecting bottom electrode and the photoactive blend of poly(3-hexylthiophene) (P3HT) and phenyl-C61-butyric acid methyl ester (PCBM). The structure and morphology of the dense, planar ZnO layers were controlled either by electro-deposition or spray pyrolysis techniques. Metal oxide sandwich OPV devices based on the photoactive blend on an electro-deposited ZnO interlayer with a (100) preferential crystal orientation, and using a tungsten oxide (WOx) interlayer on the opposite electrode, resulted in a remarkable increase in power conversion efficiency with a value of 4.91% under AM1.5 illumination and an external quantum efficiency of 74%. Electro-deposition of the ZnO at low temperature proved to be the most promising method for forming the ZnO interlayers, allowing the highest control of film structure and morphology, as well as leading to significantly improved device efficiency and stability.

Journal article

Tan KS, Riley J, 2011, Synthesis and Photocatalytic Activity of Natural Rubber/Titanates Nanocomposite, JOURNAL OF RUBBER RESEARCH, Vol: 14, Pages: 139-150, ISSN: 1511-1768

Journal article

Adkins S, Karthikeyan G, Damayanthi T, Kodetham G, Riley DJ, Naidu RAet al., 2010, IXth International Symposium on Thysanoptera and Tospoviruses 31<SUP>st</SUP> August-4<SUP>th</SUP> September 2009, Sea World Resort, Queensland, Australia Abstracts, JOURNAL OF INSECT SCIENCE, Vol: 10, ISSN: 1536-2442

Journal article

Seifi M, Ross DK, Riley DJ, Morrison Iet al., 2009, The dependence of the hydrogen sorption capacity of single-walled carbon nanotubes on the concentration of catalyst, CARBON, Vol: 47, Pages: 3184-3191, ISSN: 0008-6223

Journal article

Edmondson PD, Riley DJ, Birtcher RC, Donnelly SEet al., 2009, Amorphization of crystalline Si due to heavy and light ion irradiation, JOURNAL OF APPLIED PHYSICS, Vol: 106, ISSN: 0021-8979

Journal article

Marsh DH, Riley DJ, York D, Graydon Aet al., 2009, Sorption of inorganic nanoparticles in woven cellulose fabrics, PARTICUOLOGY, Vol: 7, Pages: 121-128, ISSN: 1674-2001

Journal article

Xie F, Ryan M, Riley J, Mason Pet al., 2009, Investigation of homogeneous large surface area anodic alumina membrane synthesis, IEEE-NANO 2009. 9th IEEE Conference, Pages: 319-321

Conference paper

Chang Y-C, Sabourin CLK, Lu S-E, Sasaki T, Svoboda KKH, Gordon MK, Riley DJ, Casillas RP, Gerecke DRet al., 2009, Upregulation of Gamma-2 Laminin-332 in the Mouse Ear Vesicant Wound Model, JOURNAL OF BIOCHEMICAL AND MOLECULAR TOXICOLOGY, Vol: 23, Pages: 172-184, ISSN: 1095-6670

Journal article

Alder RW, Hyland NP, Jeffery JC, Riis-Johannessen T, Riley DJet al., 2009, Poly(1,1-bis(dialkylamino)propan-1,3-diyl)s; conformationally-controlled oligomers bearing electroactive groups, ORGANIC & BIOMOLECULAR CHEMISTRY, Vol: 7, Pages: 2704-2715, ISSN: 1477-0520

Journal article

Cook JP, Riley DJ, 2009, A New Type of Display Device Based on Remote Swelling and Collapse of a pH-Responsive Microgel, Symposium on Polymer-Based Materials held at the 2008 MRS Fall Meeting, Publisher: MATERIALS RESEARCH SOC, Pages: 217-+, ISSN: 0272-9172

Conference paper

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