School of Physics and Astronomy

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Dr Kevin Critchley

Molecular and Nanoscale Physics Group

Contact details

Room: 8.38
Tel: +44 (0)113 3433873
Email: k.critchley @ leeds.ac.uk

Keywords

Nanoscience
Quantum dots
Nanowires
Bionanotechnology
Nanoparticles
Nanomedicine
Surface chemistry
Nanoscale transport measurements

Research interests

My research group focuses on the development of advanced nanomaterials and translating these towards biomedical applications. By understanding the fundamental physics behind the materials we synthesize we strive to make leaps forward in the fields of Nanotechnology and Nanomedicine. The three themes that we currently study are:

Quantum dot technology. We synthesize and develop cadmium based and cadmium-free quantum dots for advance biomedical imaging technologies. As well as development of biocompatible materials, we are also working towards quantum dots with bimodal properties. Our aim to expand activity in this area and will be offering PhD, and PDRA opportunities.

Nanowires. We synthesize and characterize semiconductor (ZnO, CdTe, PbTe) and metallic (Au, Ni, Cu, Zn, and Ag) nanowires. The main focus is to understand and use the properties introduced by nanoscale effects. We study the tranposrt properties using multiprobe scanning probe microscopy in combination with an SEM. Material properties are studied by TEM/

Nanoparticles. We synthesize and study functionalised nanoparticles to improve the understanding of nanoparticle interactions with biological systems.

Useful links

Critchley Group homepage

Publications

Virzbickas K, Rimkute L, Harvie AJ, Critchley K Surfactant-dependent photoluminescence of CdTe/CdS nanocrystals Journal of Experimental Nanoscience 1-10, 2017
DOI:10.1080/17458080.2016.1273553
View abstract

Virzbickas K, Rimkute L, Harvie AJ, Critchley K Surfactant-dependent photoluminescence of CdTe/CdS nanocrystals: PL spectroscopy, absorption spectroscopy and TIRF data, 2017
DOI:10.5518/144

Harvie AJ, Booth M, Chantry RL, Hondow N, Kepaptsoglou DM, Ramasse QM, Evans SD, Critchley K Observation of compositional domains within individual copper indium sulfide quantum dots Nanoscale 8 16157-16161, 2016
DOI:10.1039/c6nr03269a
View abstract

Ye S, Benz F, Wheeler MC, Oram J, Baumberg JJ, Cespedes O, Christenson HK, Coletta PL, Jeuken LJC, Markham AF, Critchley K, Evans SD One-step fabrication of hollow-channel gold nanoflowers with excellent catalytic performance and large single-particle SERS activity Nanoscale 8 14932-14942, 2016
DOI:10.1039/c6nr04045d
View abstract

Galloway JM, Bird SM, Talbot JE, Shepley PM, Bradley RC, El-Zubir O, Allwood DA, Leggett GJ, Miles JJ, Staniland SS, Critchley K Nano- and micro-patterning biotemplated magnetic CoPt arrays. Nanoscale 8 11738-11747, 2016
DOI:10.1039/C6NR03330J
View abstract

Alotaibi KM, Shiels L, Lacaze L, Peshkur TA, Anderson P, Machala L, Critchley K, Patwardhan SV, Gibson LT Iron supported on bioinspired green silica for water remediation Chemical Science 8 567-576, 2016
DOI:10.1039/c6sc02937j
View abstract

Galloway JM, Talbot JE, Critchley K, Miles JJ, Bramble JP Developing Biotemplated Data Storage: Room Temperature Biomineralization of L10CoPt Magnetic Nanoparticles Advanced Functional Materials 25 4590-4600, 2015
DOI:10.1002/adfm.201501090
View abstract

Galloway JM, Talbot JE, Critchley K, Miles JJ, Bramble JP Data Storage: Developing Biotemplated Data Storage: Room Temperature Biomineralization of L1 0 CoPt Magnetic Nanoparticles (Adv. Funct. Mater. 29/2015) Advanced Functional Materials 25 4744-4744, 2015
DOI:10.1002/adfm.201570200

Ye S, Marston G, McLaughlan JR, Sigle DO, Ingram N, Freear S, Baumberg JJ, Bushby RJ, Markham AF, Critchley K, Coletta PL, Evans SD Engineering gold nanotubes with controlled length and near-infrared absorption for theranostic applications Advanced Functional Materials 25 2117-2127, 2015
DOI:10.1002/adfm.201404358
View abstract

Ye S, Marston G, McLaughlan JR, Sigle DO, Ingram N, Freear S, Baumberg JJ, Bushby RJ, Markham AF, Critchley K, Coletta PL, Evans SD Theranostics: Engineering Gold Nanotubes with Controlled Length and Near-Infrared Absorption for Theranostic Applications (Adv. Funct. Mater. 14/2015) Advanced Functional Materials 25 2204-2204, 2015
DOI:10.1002/adfm.201570099

Bawazer LA, Ihli J, Comyn TP, Critchley K, Empson CJ, Meldrum FC Genetic algorithm-guided discovery of additive combinations that direct quantum dot assembly Advanced Materials 27 223-227, 2015
DOI:10.1002/adma.201403185
View abstract

Kraatz IT, Booth M, Whitaker BJ, Nix MGD, Critchley K Sub-bandgap emission and intraband defect-related excited-state dynamics in colloidal CuInS2/ZnS quantum dots revealed by femtosecond pump-dump-probe spectroscopy Journal of Physical Chemistry C 118 24102-24109, 2014
DOI:10.1021/jp5065374
View abstract

Murray J, Nowak D, Pukenas L, Azhar R, Guillorit M, Wälti C, Critchley K, Johnson S, Bon RS Solid phase synthesis of functionalised SAM-forming alkanethiol- oligoethyleneglycols Journal of Materials Chemistry B 2 3741-3744, 2014
DOI:10.1039/c4tb00573b
View abstract

Zhang S, Chen R, Malhotra G, Critchley K, Vakurov A, Nelson A Electrochemical modelling of QD-phospholipid interactions Journal of Colloid and Interface Science 420 9-14, 2014
DOI:10.1016/j.jcis.2013.12.054
View abstract

Booth M, Peel R, Partanen R, Hondow N, Vasilca V, Jeuken LJC, Critchley K Amphipol-encapsulated CuInS2/ZnS quantum dots with excellent colloidal stability RSC Advances 3 20559-20566, 2013
DOI:10.1039/c3ra43846e
View abstract

Abou-Saleh RH, Peyman SA, Critchley K, Evans SD, Thomson NH Nanomechanics of lipid encapsulated microbubbles with functional coatings. Langmuir 29 4096-4103, 2013
DOI:10.1021/la304093t
View abstract

Galloway JM, Bird SM, Bramble JP, Critchley K, Staniland SS Biotemplating magnetic nanoparticles on patterned surfaces for potential use in data storage Materials Research Society Symposium Proceedings 1569 -, 2013
DOI:10.1557/opl.2013.828
View abstract

Peyman SA, Abou-Saleh RH, McLaughlan JR, Ingram N, Johnson BR, Critchley K, Freear S, Evans JA, Markham AF, Coletta PL, Evans SD Expanding 3D geometry for enhanced on-chip microbubble production and single step formation of liposome modified microbubbles. Lab Chip 12 4544-4552, 2012
DOI:10.1039/c2lc40634a
View abstract

Tanaka M, Critchley K, Matsunaga T, Evans SD, Staniland SS Fabrication of lipid tubules with embedded quantum dots by membrane tubulation protein. Small 8 1590-1595, 2012
DOI:10.1002/smll.201102446
View abstract

Shim BS, Zhu J, Jan E, Critchley K, Kotov NA Transparent conductors from layer-by-layer assembled SWNT films: importance of mechanical properties and a new figure of merit. ACS Nano 4 3725-3734, 2010
DOI:10.1021/nn100026n
View abstract

Podsiadlo P, Krylova G, Lee B, Critchley K, Gosztola DJ, Talapin DV, Ashby PD, Shevchenko EV The role of order, nanocrystal size, and capping ligands in the collective mechanical response of three-dimensional nanocrystal solids. J Am Chem Soc 132 8953-8960, 2010
DOI:10.1021/ja100464a
View abstract

Critchley K, Khanal BP, Górzny MŁ, Vigderman L, Evans SD, Zubarev ER, Kotov NA Near-bulk conductivity of gold nanowires as nanoscale interconnects and the role of atomically smooth interface. Adv Mater 22 2338-2342, 2010
DOI:10.1002/adma.201000236

Srivastava S, Santos A, Critchley K, Kim KS, Podsiadlo P, Sun K, Lee J, Xu C, Lilly GD, Glotzer SC, Kotov NA Light-controlled self-assembly of semiconductor nanoparticles into twisted ribbons. Science 327 1355-1359, 2010
DOI:10.1126/science.1177218
View abstract

Podsiadlo P, Qin M, Cuddihy M, Zhu J, Critchley K, Kheng E, Kaushik AK, Qi Y, Kim HS, Noh ST, Arruda EM, Waas AM, Kotov NA Highly ductile multilayered films by layer-by-layer assembly of oppositely charged polyurethanes for biomedical applications. Langmuir 25 14093-14099, 2009
DOI:10.1021/la9021323
View abstract

Critchley K, Cheadle EM, Zhang HL, Baldwin KJ, Liu Q, Cheng Y, Fukushima H, Tamaki T, Batchelder DN, Bushby RJ, Evans SD Surface plasmon Raman scattering studies of liquid crystal anchoring on liquid-crystal-based self-assembled monolayers. J Phys Chem B 113 15550-15557, 2009
DOI:10.1021/jp907497p
View abstract

Srivastava S, Podsiadlo P, Critchley K, Zhu J, Qin M, Shim BS, Kotov NA Single-Walled Carbon Nanotubes Spontaneous Loading into Exponentially Grown LBL Films CHEM MATER 21 4397-4400, 2009
DOI:10.1021/cm900773v

Podsiadlo P, Michel M, Critchley K, Srivastava S, Qin M, Lee JW, Verploegen E, Hart AJ, Qi Y, Kotov NA Diffusional Self-Organization in Exponential Layer-By-Layer Films with Micro- and Nanoscale Periodicity Angewandte Chemie 121 7207-7211, 2009
DOI:10.1002/ange.200901720

Shim BS, Zhu J, Jan E, Critchley K, Ho S, Podsiadlo P, Sun K, Kotov NA Multiparameter structural optimization of single-walled carbon nanotube composites: toward record strength, stiffness, and toughness. ACS Nano 3 1711-1722, 2009
DOI:10.1021/nn9002743
View abstract

Podsiadlo P, Arruda EM, Kheng E, Waas AM, Lee J, Critchley K, Qin M, Chuang E, Kaushik AK, Kim HS, Qi Y, Noh ST, Kotov NA LBL assembled laminates with hierarchical organization from nano- to microscale: high-toughness nanomaterials and deformation imaging. ACS Nano 3 1564-1572, 2009
DOI:10.1021/nn900239w
View abstract

Bowen J, Manickam M, Iqbal P, Evans SD, Critchley K, Preece JA, Kendall K The adhesive properties of pyridine-terminated self-assembled monolayers THIN SOLID FILMS 517 3806-3812, 2009
DOI:10.1016/j.tsf.2009.01.093

Podsiadlo P, Michel M, Critchley K, Srivastava S, Qin M, Lee JW, Verploegen E, Hart AJ, Qi Y, Kotov NA Diffusional self-organization in exponential layer-by-layer films with micro- and nanoscale periodicity. Angew Chem Int Ed Engl 48 7073-7077, 2009
DOI:10.1002/anie.200901720

Hamlett CAE, Docker PT, Ward MCL, Prewett PD, Critchley K, Evans SD, Preece JA pH-dependent adsorption of Au nanoparticles on chemically modified Si3N4 MEMS devices J EXP NANOSCI 4 147-157, 2009
DOI:10.1080/17458080902929911

Ho SS, Critchley K, Lilly GD, Shim B, Kotov NA Free flow electrophoresis for the separation of CdTe nanoparticles J MATER CHEM 19 1390-1394, 2009
DOI:10.1039/b820703h

Iqbal P, Critchley K, Attwood D, Tunnicliffe D, Evans SD, Preece JA Chemical manipulation by X-rays of functionalized thiolate self-assembled monolayers on Au. Langmuir 24 13969-13976, 2008
DOI:10.1021/la802244a
View abstract

Hamlett CAE, Critchley K, Gorzny M, Evans SD, Prewett PD, Preece JA Vapour phase formation of amino functionalised Si3N4 surfaces SURF SCI 602 2724-2733, 2008
DOI:10.1016/j.susc.2008.06.026

Han XJ, Sheikh K, Pradeep SND, Critchley K, Bushby RJ, Evans SD COLL 262-Supported bilayer lipid membranes on photopatterned self-assembled monolayers ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY 235 -, 2008

Bowen J, Manickam M, Evans SD, Critchley K, Kendall K, Preece JA The pH-dependent adhesion of nanoparticles to self-assembled monolayers on gold THIN SOLID FILMS 516 2987-2999, 2008
DOI:10.1016/j.tsf.2007.11.002

Marten J, Erbe A, Critchley K, Brarnble JP, Weber E, Evans SD Self-assembled layers based on isomerizable stilbene and diketoarylhydrazoitie moieties LANGMUIR 24 2479-2486, 2008
DOI:10.1021/la703109x

Hamlett CEA, Critchley K, Gorzny M, Evans SD, Prewett PD, Preece JA Vapour phase formation of amino functionalised Si3N4 surfaces Surface Science 602 2724-2733, 2008
DOI:10.1016/j.susc.2008.06.026
View abstract

McKendry JE, Allen CS, Critchley K, Gorzny ML, Walton AS, Evans SD Magnetic field enhanced nano-tip fabrication for four-probe STM studies Nanotechnology 19 -, 2008
View abstract

Critchley K, Ducker R, Bramble JP, Zhang L, Bushby RJ, Leggett GJ, Evans SD Photo-deprotection patterning of self-assembled monolayers Journal of Experimental Nanoscience 2 279-290, 2007
DOI:10.1080/17458080701675780
View abstract

Han X, Critchley K, Zhang L, Pradeep SN, Bushby RJ, Evans SD A novel method to fabricate patterned bilayer lipid membranes. Langmuir 23 1354-1358, 2007
DOI:10.1021/la062636v
View abstract

Iqbal P, Critchley K, Bowen J, Attwood D, Tunnicliffe D, Evans SD, Preece JA Fabrication of a nanoparticle gradient substrate by thermochemical manipulation of an ester functionalized SAM Journal of Materials Chemistry 17 5097-5110, 2007

Han X, Pradeep SN, Critchley K, Sheikh K, Bushby RJ, Evans SD Supported bilayer lipid membrane arrays on photopatterned self-assembled monolayers. Chemistry 13 7957-7964, 2007
DOI:10.1002/chem.200700521
View abstract

Walton A, Allen CS, Critchley K, Gorzny ML, McKendry JE, Brydson RMD, Hickey BJ, Evans SD Four-probe electrical transport measurements on individual metallic nanowires Nanotechnology 18 pp.065204-, 2007
View abstract

Critchley K, Ducker R, Bramble JP, Zhang L, Bushby RJ, Leggett GJ, Evans SD Photo-deprotection patterning of self-assembled monolayers J EXP NANOSCI 2 278-290, 2007
DOI:10.1080/17458080701675780

Critchley K, Zhang L, Fukushima H, Ishida M, Shimoda T, Bushby RJ, Evans SD Soft-UV Photolithography using Self-Assembled Monolayers Journal of Physical Chemistry: B 110 17167-17174, 2006
DOI:10.1021/jp0630370

Sun SQ, Mendes P, Critchley K, Diegoli S, Hanwell M, Evans SD, Leggett GJ, Preece JA, Richardson TH Fabrication of gold micro- and nanostructures by photolithographic exposure of thiol-stabilized gold nanoparticles NANO LETT 6 345-350, 2006
DOI:10.1021/nl052130h

Diegoli S, Mendes PM, Baguley ER, Leigh SJ, Iqbal P, Diaz YRG, Begum S, Critchley K, Hammonds GD, Evans SD, Attwood D, Jones IP, Preece JA PH-dependent gold nanoparticle self-organization on functionalized Si/SiO2 surfaces J EXP NANOSCI 1 333-353, 2006
DOI:10.1080/17458080600778644

Sun SQ, Montague M, Critchley K, Chen MS, Dressick WJ, Evans SD, Leggett GJ Fabrication of biological nanostructures by scanning near-field photolithography of chloromethylphenyisiloxane monolayers NANO LETT 6 29-33, 2006
DOI:10.1021/nl051804l

Iqbal P, Critchley K, Begum S, Attwood D, Evans SD, Preece JA Novel 3,4-disubstituted thiophenes for weak passivation of Au nanoparticles J EXP NANOSCI 1 143-164, 2006
DOI:10.1080/17458080500504058

Boote JJ, Critchley K, Evans SD Surfactant mediated assembly of gold nanowires on surfaces J EXP NANOSCI 1 125-142, 2006
DOI:10.1080/17458080600669785

Brewer NJ, Janusz S, Critchley K, Evans SD, Leggett GJ Photooxidation of self-assembled monolayers by exposure to light of wavelength 254 nm: A static SIMS study J PHYS CHEM B 109 11247-11256, 2005
DOI:10.1021/jp0443299

Zhang HL, Evans SD, Critchley K, Fukushima H, Tamaki T, Fournier F, Zheng W, Carrez S, Dubost H, Bourguignon B Novel cyanoterphenyl self-assembly monolayers on Au(111) studied by ellipsometry, x-ray photoelectron spectroscopy, and vibrational spectroscopies. J Chem Phys 122 224707-, 2005
DOI:10.1063/1.1893618
View abstract

Critchley K, Jeyadevan JP, Fukushima H, Ishida M, Shimoda T, Bushby RJ, Evans SD A Mild Photoactivated Hydrophilic/Hydrophobic Switch Langmuir 21 4554-4561, 2005
DOI:10.1021/la046851s

Mendes PM, Jacke S, Critchley K, Plaza J, Chen Y, Nikitin K, Palmer RE, Preece JA, Evans SD, Fitzmaurice D Gold nanoparticle patterning of silicon wafers using chemical e-beam lithography LANGMUIR 20 3766-3768, 2004
DOI:10.1021/la049803g

Mendes P, Belloni M, Ashworth M, Hardy C, Nikitin K, Fitzmaurice D, Critchley K, Evans S, Preece J A novel example of X-ray-radiation-induced chemical reduction of an aromatic nitro-group-containing thin film on SiO2 to an aromatic amine film CHEMPHYSCHEM 4 884-889, 2003
DOI:10.1002/cphc.200300699

Cant NE, Critchley K, Zhang H, Evans SD Surface functionalisation for the self-assembly of nanoparticle/polymer multilayer films Thin Solid Films 426 31-39, 2003
DOI:10.1016/S0040-6090(02)01300-7

Cant NE, Zhang H, Critchley K, Mykhalyk TA, Davies GR, Evans SD Fabrication and characterization of self-assembled nanoparticle/polyelectrolyte multilayer films Journal of Physical Chemistry: B 107 13557-13562, 2003
DOI:10.1021/jp035388+

Booth M, Brown AP, Evans SD, Critchley K Determining the Concentration of CuInS2 Quantum Dots from the Size-Dependent Molar Extinction Coefficient Chemistry of Materials -,
DOI:10.1021/cm300227b