Dr Jesús J Ojeda - BSc PhD MRSC

Jesús Javier Ojeda is a Lecturer in Surface Science at ETCbrunel. Jesús’ research interests include the detection, quantification and monitoring of the interactions between cells, soil, nanomaterials, pollutants and surfaces in complex media, and the use of state-of-the-art spectroscopic techniques (such as imaging ToF-SIMS, micro-FTIR, ATR-FTIR, XPS, EXAFS, and potentiometry) to describe these systems. Jesús has developed a strong interest in assessing the importance of cell surface composition on adhesion, growth, chemical exchange, as well as the effects of environmental conditions (such as pH, nutrients or ionic strength) on biofilm formation.

Dr Ojeda completed his PhD in Surface Chemistry in 2009 at the Kroto Research Institute, University of Sheffield, studying the interactions between biological materials and surfaces using potentiometric and spectroscopic techniques. His undergraduate studies were made at the Department of Chemistry, Simon Bolivar University, Venezuela, where he gained a degree in Chemistry in 2000. Since 1998, he has been participating in research activities and then working full-time on surface characterisation, catalysis and analytical chemistry in the oil industry. In 2003, he became an Associate Specialist in Analytical Chemistry at Chemiconsult C.A. and in January 2004, he moved to the University of Sheffield in order to study sorption of organic pollutants in soils. In April 2005 he was appointed as a Research Associate in Spectroscopy at the Laboratories of Environmental Sciences, Kroto Research Institute, The University of Sheffield, and later was made responsible for the Institute’s Surface Analysis Centre (XPS and ToF-SIMS). In February 2010, he was appointed as a Lecturer in Surface Science at ETCbrunel.

Dr Ojeda’s research topics also include:

• Detection, quantification and monitoring of the interactions between cells, colloids and engineered nanomaterials in complex environmental media.
  
• Sorption and complexation of radionuclides by bacterial cell walls, and their potential application for the treatment of nuclear waste.
• Design and characterisation of coatings for the inhibition of bacterial growth, and biocompatible coatings for medical applications.

In addition to the above research topics, Jesús also provides expert consultancy services in Surface Sciences, as well as confidential analytical services to commercial clients using micro-FTIR spectroscopy (micro-FTIR), X-ray Photoelectron Spectroscopy (XPS) and Time-of-Flight Secondary Ion Mass Spectrometry (ToF-SIMS).

Publications

Journal Papers

(2012) Bailey, MJ., Bright, NJ., Croxton, RS., Francese, S., Ferguson, LS., Hinder, S., Jickells, S., Jones, BJ., Jones, BN., Kazarian, SG., Ojeda, JJ., Webb, RP., Wolstenholme, R. and Bleay, S., Chemical Characterization of Latent Fingerprints by Matrix-Assisted Laser Desorption Ionization, Time-of-Flight Secondary Ion Mass Spectrometry, Mega Electron Volt Secondary Mass Spectrometry, Gas Chromatography/Mass Spectrometry, X-ray Photoelectron Spectroscopy, and Attenuated Total Reflection Fourier Transform Infrared Spectroscopic Imaging: An Intercomparison, ANALYTICAL CHEMISTRY 84 (20) : 8514- 8523

(2012) Ju-Nam, Y., Chen, Y-S., Ojeda, JJ., Allen, DW., Cross, NA., Gardiner, PHE. and Bricklebank, N., Water-soluble gold nanoparticles stabilized with cationic phosphonium thiolate ligands, RSC Advances 2 (27) : 10345- 10351

(2012) Cruz Blanco, CF., Pal, C., Ojeda, JJ., Ray, AK. and Sharma, AK., Morphological and elemental studies on titania thin films electrodeposited at different bath temperatures, Journal of the Electrochemical Society 159 (2) : E30- E36

(2012) Harrison, JP., Ojeda, JJ. and Romero-González, ME., The applicability of reflectance micro-Fourier-transform infrared spectroscopy for the detection of synthetic microplastics in marine sediments., Sci Total Environ 416 455- 463 Download publication

(2011) Merroun, ML., Nedelkova, M., Ojeda, JJ., Reitz, T., Fernández, ML., Arias, JM., Romero-González, M. and Selenska-Pobell, S., Bio-precipitation of uranium by two bacterial isolates recovered from extreme environments as estimated by potentiometric titration, TEM and X-ray absorption spectroscopic analyses, Journal of Hazardous Materials 197 1- 10

(2011) Schmalenberger, A., Pritzkow, W., Ojeda, JJ. and Noll, M., Characterization of main sulfur source of wood-degrading basidiomycetes by S K-edge X-ray absorption near edge spectroscopy (XANES), INTERNATIONAL BIODETERIORATION & BIODEGRADATION 65 1215- 1223

(2011) Jones, BJ., Anguilano, L. and Ojeda, JJ., Argon plasma treatment techniques on steel and effects on diamond-like carbon structure and delamination, Diamond and Related Materials 20 (7) : 1030- 1035 Download publication

(2010) Zhou, Z., Rainforth, WM., Luo, Q., Hovsepian, PE., Ojeda, JJ. and Romero-Gonzalez, ME., Wear and friction of TiAlN/VN coatings against Al2O3 in air at room and elevated temperatures, Acta Materialia 58 (8) : 2912- 2925

(2009) Ojeda, JJ., Romero-Gonzalez, ME. and Banwart, SA., Analysis of bacteria on steel surfaces using reflectance micro-Fourier transform infrared spectroscopy, Analytical Chemistry 81 6467- 6473

(2008) Ojeda, JJ., Romero-Gonzalez, ME., Bachmann, RT., Edyvean, RGJ. and Banwart, SA., Characterisation of the cell surface and cell wall chemistry of drinking water bacteria by combining XPS and FTIR spectroscopy, modelling and potentiometric titrations, Langmuir 24 4032- 4040

(2008) Ojeda, JJ., Romero-Gonzalez, ME., Pouran, HM. and Banwart, SA., In-situ monitoring of the biofilm formation of pseudomonas putida on hematite using flow-cell ATR-FTIR spectroscopy to investigate the formation of inner sphere bonds between the bacteria and the mineral, Mineralogical Magazine 72 101- 106

(2008) Geoghegan, M., Andrews, JS., Biggs, CA., Eboigbodin, KE., Elliott, DR., Rolfe, S., Scholes, J., Ojeda, JJ., Romero-González, ME., Edyvean, RGJ., Swanson, L., Rutkaite, R., Fernando, R., Pen, Y., Zhang, Z. and Banwart, SA., The polymer physics and chemistry of microbial cell attachment and adhesion, Faraday Discussions 139 85- 103

(2007) Zhou, Z., Rainforth, WM., Tan, CC., Zeng, P., Ojeda, JJ., Romero-Gonzalez, ME. and Hovsepian, PE., The role of the tribofilm and roll-like debris in the wear of nanoscale nitride PVD coatings, WEAR 263 1328- 1334

(2007) Eboigbodin, KE., Ojeda, JJ. and Biggs, CA., Investigating the surface properties of Escherichia coli under glucose controlled conditions and its effect on aggregation, Langmuir 23 (12) : 6691- 6697

(2004) Ledo, H., Rivas, Z., Gutierrez, J., Gutierrez, E., Ojeda, J. and Avila, H., Baseline of Ca, Mg, Fe, Mn and Al concentrations in Catatumbo River surficial sediments, WATER AIR SOIL POLL 155 (1-4) : 117- 135

Conference Papers

(2006) Romero-Gonzalez, ME., Ojeda, JJ., Nwaobi, B. and Banwart, SA., Effects of pH on cell surface properties and its interactions with metals, 16th Annual V M Goldschmidt Conference, GEOCHIMICA ET COSMOCHIMICA ACTA (70) : A538- A538

(2011) Silver, J., Withnall, R., Ireland, TG., Yan, X., Saltoun, K. and Ojeda, JJ., Surface studies of Y2O3:Eu, YAG:Ce, Y 2O2S:Pr and Gd2O2S:M (M = Pr or Tb) phosphors, , Proceedings of the International Display Workshops (2) : 731- 734

(2009) Ojeda, JJ., Romero-Gonzalez, ME., Pouran, HM. and Banwart, SA., Investigating the chemical interactions between Pseudomonas putida and hematite using in situ flow-cell ATR-FTIR with a hematite-coated Ge crystal, 19th Annual VM Goldschmidt Conference, GEOCHIMICA ET COSMOCHIMICA ACTA (73) : A968- A968

(2006) Romero-Gonzalez, ME., Ojeda, JJ., Banwart, SA. and Worrall, F., Quantifying spatial adsorption variability of organic pollutants and metals to soil by aqueous chemistry and spectroscopic methods, 231st National Meeting of the American-Chemical-Society, ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY (231) : -

(2006) Ojeda, JJ., Romero-Gonzalez, ME., Bachmann, RT. and Banwart, SA., Aquabacterium commune: Combination of imaging FTIR spectroscopy, modeling and potentiometric titrations to characterize the cell surface and interactions between bacteria and solids in real time, 231st National Meeting of the American-Chemical-Society, ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY (231) : -

(2005) Ojeda, JJ., Romero-Gonzalez, ME., Banwart, SA., Worral, F., Collins, J. and Craig, P., Variation in adsorption parameters with bulk soil properties, 15th Annual V M Goldschmidt Conference, GEOCHIMICA ET COSMOCHIMICA ACTA (69) : A811- A811

Book Chapters

(2012) Ojeda, JJ. and Dittrich, M., Fourier transform infrared spectroscopy for molecular analysis of microbial cells.. In: Microbial Systems Biology : Methods and Protocols. Springer (881) : 187- 211