selected publications
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academic article
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Wu KHHuang XTahini HKappen PHuang RTan XJang LYDing YSmith SCQi WGentle IRSu DSAmal RWang DW. Oxygen Electrocatalysis at Mn III -O
x -C Hybrid Heterojunction: An Electronic Synergy or Cooperative Catalysis?. ACS Applied Materials and Interfaces. 11:706-713. 2019 - Cumberland SAEtschmann BBrugger JDouglas GEvans KFisher LKappen PMoreau JW. Characterization of uranium redox state in organic-rich Eocene sediments. Chemosphere. 194:602-613. 2018
- Herries AIRMurszewski APickering RMallett TJoannes-Boyau RArmstrong BAdams JWBaker SBlackwood AFPenzo-Kajewski PKappen PLeece ABMartin JRovinsky DBoschian G. Geoarchaeological and 3D visualisation approaches for contextualising in-situ fossil bearing palaeokarst in South Africa: A case study from the ∼2.61 Ma Drimolen Makondo. Quaternary International. 483:90-110. 2018
- Blamey FPCMcKenna BALi CCheng MTang CJiang HHoward DLPaterson DJKappen PWang PMenzies NWKopittke PM. Manganese distribution and speciation help to explain the effects of silicate and phosphate on manganese toxicity in four crop species. New Phytologist. 217:1146-1160. 2018
- Cumberland SAWilson SAEtschmann BKappen PHoward DPaterson DBrugger J. Rapid immobilisation of U(VI) by eucalyptus bark: adsorption without reduction. Applied Geochemistry. 96:1-10. 2018
- Bennett WWLombi EBurton EDJohnston SGKappen PHoward DLCanfield DE. Synchrotron X-ray spectroscopy for investigating vanadium speciation in marine sediment: limitations and opportunities. Journal of Analytical Atomic Spectrometry. 33:1689-1699. 2018
- Etschmann BEMei YLiu WSherman DTestemale DMüller HRae NKappen PBrugger J. The role of Pb(II) complexes in hydrothermal mass transfer: An X-ray absorption spectroscopic study. Chemical Geology. 502:88-106. 2018
- Markham JLiang JLevina AMak RJohannessen BKappen PGlover CJLai BVogt SLay PA. (Pentamethylcyclopentadienato)rhodium Complexes for Delivery of the Curcumin Anticancer Drug. European Journal of Inorganic Chemistry. 2017:1812-1823. 2017
- Kappen PFerrando-Miguel GReichman SMInnes LWelter EPigram PJ. Antimony leaching and chemical species analyses in an industrial solid waste: Surface and bulk speciation using ToF-SIMS and XANES. Journal of Hazardous Materials. 329:131-140. 2017
- Liu WMei YEtschmann BBrugger JPearce MRyan CGBorg SWykes JKappen PPaterson DBoesenberg UGarrevoet JMoorhead GFalkenberg G. Arsenic in hydrothermal apatite: Oxidation state, mechanism of uptake, and comparison between experiments and nature. Geochimica et Cosmochimica Acta. 196:144-159. 2017
- Rahman MSClark MWYee LHComarmond MJPayne TEKappen PMokhber-Shahin L. Arsenic solid-phase speciation and reversible binding in long-term contaminated soils. Chemosphere. 168:1324-1336. 2017
- Wong RJScott JKappen PLow GK-CHart JNAmal R. Enhancing bimetallic synergy with light: the effect of UV light pre-treatment on catalytic oxygen activation by bimetallic Au–Pt nanoparticles on a TiO 2 support. Catalysis Science and Technology. 7:4792-4805. 2017
- Etschmann BLiu WLi KDai SReith FFalconer DKerr GPaterson DHoward DKappen PWykes JBrugger J. Enrichment of germanium and associated arsenic and tungsten in coal and roll-front uranium deposits. Chemical Geology. 463:29-49. 2017
- Best SPLevina AGlover CJohannessen BKappen PLay PA. XAS spectroelectrochemistry: Reliable measurement of X-ray absorption spectra from redox manipulated solutions at room temperature. Journal of Synchrotron Radiation. 23:743-750. 2016
- Gransbury GKKappen PGlover CJHughes JNLevina ALay PAMusgrave IFHarris HH. Comparison of KP1019 and NAMI-A in tumour-mimetic environments. Metallomics: integrated biometal science. 8:762-773. 2016
- Brack NKappen PSpencer MJSHerries AIRRider AN. Manipulation of carbon nanotube magnetism with metal-rich iron nanoparticles. Journal of Materials Chemistry C. 4:1215-1227. 2016
- Wang PMenzies NWDennis PGGuo JForstner CSekine RLombi EKappen PBertsch PMKopittke PM. Silver Nanoparticles Entering Soils via the Wastewater-Sludge-Soil Pathway Pose Low Risk to Plants but Elevated Cl Concentrations Increase Ag Bioavailability. Environmental Science and Technology (Washington). 50:8274-8281. 2016
- Attygalla NWBaldwin DSSilvester EKappen PWhitworth KL. The severity of sediment desiccation affects the adsorption characteristics and speciation of phosphorus. Environmental Sciences: Processes and Impacts. 18:64-71. 2016
- Alwis LKHKMucalo MRIngham BKappen P. A Combined SNIFTIRS and XANES Study of Electrically Polarized Copper Electrodes in DMSO and DMF Solutions of Cyanate (NCO−), Thiocyanate (NCS−) and Selenocyanate (NCSe−) Ions. Journal of Electrochemical Society. 162:434-448. 2015
- Alwis KHKLIngham BMucalo MRKappen PGlover C. An X-ray absorption spectroscopy investigation of the coordination environment of electrogenerated Ni(ii)-pseudohalide complexes arising from the anodic polarization of Ni electrodes in DMSO solutions of NCO-, NCS- and NCSe- ions. RSC Advances. 5:15709-15718. 2015
- Liu LWang DKKappen PMartens DLSmart SDiniz Da Costa JC. Hydrothermal stability investigation of micro- and mesoporous silica containing long-range ordered cobalt oxide clusters by XAS. Physical Chemistry Chemical Physics. 17:19500-19506. 2015
- Wang PMenzies NWLombi ESekine RBlamey FPCHernandez-Soriano MCCheng MKappen PPeijnenburg WJGMTang CKopittke PM. Silver sulfide nanoparticles (Ag2S-NPs) are taken up by plants and are phytotoxic. Nanotoxicology. 9:1041-1049. 2015
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Sekine RBrunetti GDonner EKhaksar MVasilev KJämting AKScheckel KGKappen PZhang HLombi E. Speciation and lability of Ag-, AgCl-, and Ag
2 S-nanoparticles in soil determined by X-ray absorption spectroscopy and diffusive gradients in thin films. Environmental Science and Technology (Washington). 49:897-905. 2015 - Wells HCSizeland KHEdmonds RLAitkenhead WKappen PGlover CJohannessen BHaverkamp RG. Stabilizing chromium from leather waste in biochar. ACS Sustainable Chemistry and Engineering. 2:1864-1870. 2014
- Vogel CAdam CKappen PSchiller TLipiec EMcNaughton D. Chemical state of chromium in sewage sludge ash based phosphorus-fertilisers. Chemosphere. 103:250-255. 2014
- Brack NKappen PHerries ATrueman ARider A. Evolution of Magnetic and Structural Properties during Iron Plating of Carbon Nanotubes. The Journal of Physical Chemistry Part C: Nanomaterials and Interfaces. 118:13218-13227. 2014
- Herries AKappen PKegley APatterson DHoward Dde Jonge MPotze SAdams J. Palaeomagnetic and synchrotron analysis of > 1.95 Ma fossil-bearing palaeokarst at Haasgat, South Africa. South African Journal of Science. 110:1-12. 2014
- Wang PMenzies NWLombi EMcKenna BAde Jonge MDPaterson DJHoward DLGlover CJJames SKappen PJohannessen BKopittke PM. In Situ Speciation and Distribution of Toxic Selenium in Hydrated Roots of Cowpea. Plant Physiology. 163:407-418. 2013
- Kappen PArhatari BDLuu MBBalaur ECaradoc-Davies T. Combined synchrotron X-ray tomography and X-ray powder diffraction using a fluorescing metal foil. Review of Scientific Instruments. 84:063703-063703. 2013
- Kerr JLBaldwin DSTobin MJPuskar LKappen PRees GNSilvester E. High Spatial Resolution Infrared Micro-Spectroscopy Reveals the Mechanism of Leaf Lignin Decomposition by Aquatic Fungi. PLoS ONE. 8:e60857-e60857. 2013
- Kappen PWebb J. An EXAFS study of arsenic bonding on amorphous aluminium hydroxide. Applied Geochemistry. 31:79-83. 2013
- Pickering RJacobs ZHerries AIRKarkanas PBar-Matthews MWoodhead JDKappen PFisher EMarean CW. Paleoanthropologically significant South African sea caves dated to 1.1–1.0 million years using a combination of U–Pb, TT-OSL and palaeomagnetism. Quaternary Science Reviews. 65:39-52. 2013
- Wang PMenzies NWLombi EMcKenna BAJohannessen BGlover CJKappen PKopittke PM. Fate of ZnO nanoparticles in soils and cowpea (Vigna unguiculata). Environmental Science and Technology (Washington). 47:13822-13830. 2013
- Ingham BKo MLaycock NBurnell JKappen PKimpton JAWilliams DE. In situ synchrotron X-ray diffraction study of scale formation during CO2 corrosion of carbon steel in sodium and magnesium chloride solutions. Corrosion Science. 56:96-104. 2012
- Kappen PRider APigram PJBrack N. Long-Term Stability of Metallic Iron inside Carbon Nanotubes. The Journal of Physical Chemistry Part C: Nanomaterials and Interfaces. 115:21083-21087. 2011
- Monsant ACKappen PWang YPigram PJBaker AJMTang C. In vivo speciation of zinc in Noccaea caerulescens in response to nitrogen form and zinc exposure. Plant and Soil: international journal on plant-soil relationships. 348:167-183. 2011
- Glover FWhitworth KLKappen PBaldwin DSRees GNWebb JASilvester E. Acidification and Buffering Mechanisms in Acid Sulfate Soil Wetlands of the Murray-Darling Basin, Australia. Environmental Science and Technology (Washington). 45:2591-2597. 2011
- Schefe CRKappen PPigram PJ. Carboxylic Acids Affect Sorption and Micro-Scale Distribution of Phosphorus in an Acidic Soil. Soil Science Society of America Journal. 75:35-35. 2011
- Ingham BKo MKear GKappen PLaycock NKimpton JAWilliams DE. In situ synchrotron X-ray diffraction study of surface scale formation during CO2 corrosion of carbon steel at temperatures up to 90°C. Corrosion Science. 52:3052-3061. 2010
- Kappen PHalstead BRider APigram PJBrack N. Multi-Walled Carbon Nanotubes Grown from Chemical Vapor: Links between Atomic near Range Order and Growth Parameters. The Journal of Physical Chemistry Part C: Nanomaterials and Interfaces. 113:4307-4314. 2009
- Arhatari BDPeele AGHannah KKappen PNugent KAWilliams GJYin GCChen YMChen JHSong YF. A coherence approach to phase-contrast microscopy II: Experiment. Ultramicroscopy. 109:280-286. 2009
- Schefe CRKappen PZuin LPigram PJChristensen C. Addition of carboxylic acids modifies phosphate sorption on soil and boehmite surfaces: A solution chemistry and XANES spectroscopy study. Journal of Colloid and Interface Science. 330:51-59. 2009
- Lau DKappen PStrohschnieder MBrack NPigram PJ. Characterization of green copper phase pigments in Egyptian artifacts with X-ray absorption spectroscopy and principal components analysis. Spectrochimica Acta Part B: Atomic Spectroscopy. 63:1283-1289. 2008
- KAPPEN PWELTER EBECK PMCNAMARA JMORONEY KROE GREAD APIGRAM P. Time-resolved XANES speciation studies of chromium on soils during simulated contamination. Talanta. 75:1284-1292. 2008
- Prissanaroon Ouajai WHale PSKappen PPrissanaroon WBrack NPigram PJLiesegang J. Minimizing silicone transfer during micro-contact printing. Applied Surface Science. 253:3746-3750. 2007
- Prissanaroon Ouajai WKappen PHale PSBrack NPrissanaroon WPigram PJ. X-PEEM/NEXAFS and AFM of polypyrrole and copper micro-patterns on insulating fluoropolymer substrates. Applied Surface Science. 253:1473-1479. 2006
- Hannemann SGrunwaldt J-DKrumeich FKappen PBaiker A. Electron microscopy and EXAFS studies on oxide-supported gold–silver nanoparticles prepared by flame spray pyrolysis. Applied Surface Science. 252:7862-7873. 2006
- Prissanaroon Ouajai WHale PSKappen PBrack NPrissanaroon WPigram PJLiesegang J. Micropatterning of fluoropolymers. Applied Surface Science. 252:2217-2228. 2006
- Prissanaroon Ouajai WPrissanaroon WBrack NPigram PJHale PKappen PLiesegang J. Fabrication of patterned polypyrrole on fluoropolymers for pH sensing applications. Synthetic Metals. 154:105-108. 2005
- Prissanaroon Ouajai WPrissanaroon WBrack NPigram PJHale PKappen PLiesegang J. Microcontact printing of copper and polypyrrole on fluoropolymers. Thin Solid Films. 477:131-139. 2005
- Prissanaroon Ouajai WKappen PBrack NHale PSPrissanaroon WWelter EPigram PJ. Radiation and storage-induced ageing of polypyrrole doped with dodecylbenzene sulfonic acid. Applied Surface Science. 243:287-295. 2005
- Nishino YIshikawa TSuzuki MKawamura NKappen PKorecki PHaack NMaterlik G. Photon interference effect in x-ray absorption spectra over a wide energy range. Physical Review B - Condensed Matter and Materials Physics. 66:1131031-1131034. 2002
- Kappen PTröger LMaterlik GReckleben CHansen KGrunwaldt J-DClausen BS. Silicon drift detectors as a tool for time-resolved fluorescence XAFS on low-concentrated samples in catalysis. Journal of Synchrotron Radiation. 9:246-253. 2002
- Grunwaldt JDKappen PBasini LClausen BS. Iridium clusters for catalytic partial oxidation of methane - An in situ transmission and fluorescence XAFS study. Catalysis Letters. 78:13-21. 2002
- Kappen PTröger LHansen KReckleben CLechner PStrüder LMaterlik G. Spatial characterization of monolithic multi-element Silicon-Drift-Detectors for X-ray spectroscopic applications. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment. 467-468:1163-1166. 2001
- Grunwaldt J-DKappen PHammershøi BSTröger LClausen BS. Fluorescence EXAFS for the in situ study on the state of promotors in catalysis. Journal of Synchrotron Radiation. 8:572-574. 2001
- Tröger LKappen PNishino YHaack NMaterlik G. Measurements of photon interference X-ray absorption fine structure (πXAFS). Journal of Synchrotron Radiation. 8:105-109. 2001
- Kappen PGrunwaldt J-DHammershøi BSTröger LClausen BS. The State of Cu Promoter Atoms in High-Temperature Shift Catalysts—An in Situ Fluorescence XAFS Study. Journal of Catalysis. 198:56-65. 2001
- Kappen PReihs KSeidel CVoetz MFuchs H. Overlayer thickness determination by angular dependent X-ray photoelectron spectroscopy (ADXPS) of rough surfaces with a spherical topography. Surface Science. 465:40-50. 2000
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Wu KHHuang XTahini HKappen PHuang RTan XJang LYDing YSmith SCQi WGentle IRSu DSAmal RWang DW. Oxygen Electrocatalysis at Mn III -O
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chapter
- Lau DRamanaidou ENel PKappen PVillis C. Artworks and Cultural Heritage Materials: Using Multivariate Analysis to Answer Conservation Questions. 467-494. 2013
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conference paper
- Ryan CGSiddons DPKirkham RDunn PAKuczewski AMoorhead GDe Geronimo GPaterson DJDe Jonge MDHough RMLintern MJHoward DLKappen PCleverley J. The new Maia detector system: Methods for high definition trace element imaging of natural material. AIP Conference Proceedings. 9-17. 2010