Articles | Volume 3, issue 2
https://doi.org/10.5194/ar-3-351-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/ar-3-351-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
02 Jul 2025
Research article |
| 02 Jul 2025
| 02 Jul 2025
Spark ablation metal nanoparticles and coating on TiO2 in the aerosol phase
Benjamin Gfeller
Department of Environmental Sciences, University of Basel, Basel, 4056, Switzerland
Mariia Becker
Department of Environmental Sciences, University of Basel, Basel, 4056, Switzerland
Adrian D. Aebi
Department of Environmental Sciences, University of Basel, Basel, 4056, Switzerland
Nicolas Bukowiecki
Department of Environmental Sciences, University of Basel, Basel, 4056, Switzerland
Marcus Wyss
Swiss Nanoscience Institute, University of Basel, Basel, 4056, Switzerland
Markus Kalberer
CORRESPONDING AUTHOR
Department of Environmental Sciences, University of Basel, Basel, 4056, Switzerland
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Cited articles
Arcidiacono, S., Bieri, N. R., Poulikakos, D., and Grigoropoulos, C. P.: On the coalescence of gold nanoparticles, Int. J. Multiphas. Flow, 30, 979–994, https://doi.org/10.1016/j.ijmultiphaseflow.2004.03.006, 2004.
Backman, U., Tapper, U., and Jokiniemi, J. K.: An aerosol method to synthesize supported metal catalyst nanoparticles, Synthetic Met., 142, 169–176, https://doi.org/10.1016/j.synthmet.2003.08.007, 2004.
Baig, N., Kammakakam, I., and Falath, W.: Nanomaterials: a review of synthesis methods, properties, recent progress, and challenges, Mater. Adv., 2, 1821–1871, https://doi.org/10.1039/D0MA00807A, 2021.
Barr, T. L.: An ESCA study of the termination of the passivation of elemental metals, J. Phys. Chem., 82, 1801–1810, https://doi.org/10.1021/j100505a006, 1978.
Brilke, S., Resch, J., Leiminger, M., Steiner, G., Tauber, C., Wlasits, P. J., and Winkler, P. M.: Precision characterization of three ultrafine condensation particle counters using singly charged salt clusters in the 1–4 nm size range generated by a bipolar electrospray source, Aerosol Sci. Tech., 54, 396–409, https://doi.org/10.1080/02786826.2019.1708260, 2020.
Buffat, Ph. and Borel, J.-P.: Size effect on the melting temperature of gold particles, Phys. Rev. A, 13, 2287–2298, https://doi.org/10.1103/PhysRevA.13.2287, 1976.
Castro, T., Reifenberger, R., Choi, E., and Andres, R. P.: Size-dependent melting temperature of individual nanometer-sized metallic clusters, Phys. Rev. B, 42, 8548–8556, https://doi.org/10.1103/PhysRevB.42.8548, 1990.
Chen, D.-R., Pui, D. Y. H., Hummes, D., Fissan, H., Quant, F. R., and Sem, G. J.: Design and evaluation of a nanometer aerosol differential mobility analyzer (Nano-DMA), J. Aerosol Sci., 29, 497–509, https://doi.org/10.1016/S0021-8502(97)10018-0, 1998.
Cuenya, B. R.: Synthesis and catalytic properties of metal nanoparticles: Size, shape, support, composition, and oxidation state effects, Thin Solid Films, 518, 3127–3150, https://doi.org/10.1016/j.tsf.2010.01.018, 2010.
Daruich De Souza, C., Ribeiro Nogueira, B., and Rostelato, M. E. C. M.: Review of the methodologies used in the synthesis gold nanoparticles by chemical reduction, J. Alloy. Compd., 798, 714–740, https://doi.org/10.1016/j.jallcom.2019.05.153, 2019.
Debecker, D. P., Hongmanorom, P., Pfeiffer, T. V., Zijlstra, B., Zhao, Y., Casale, S., and Sassoye, C.: Spark ablation: a dry, physical, and continuous method to prepare powdery metal nanoparticle-based catalysts, Chem. Commun., 60, 11076–11079, https://doi.org/10.1039/D4CC03469D, 2024.
Domaschke, M., Schmidt, M., and Peukert, W.: A model for the particle mass yield in the aerosol synthesis of ultrafine monometallic nanoparticles by spark ablation, J. Aerosol Sci., 126, 133–142, https://doi.org/10.1016/j.jaerosci.2018.09.004, 2018.
Eggersdorfer, M. L. and Pratsinis, S. E.: The Structure of Agglomerates Consisting of Polydisperse Particles, Aerosol Sci. Tech., 46, 347–353, https://doi.org/10.1080/02786826.2011.631956, 2012.
Feng, J., Huang, L., Ludvigsson, L., Messing, M. E., Maisser, A., Biskos, G., and Schmidt-Ott, A.: General Approach to the Evolution of Singlet Nanoparticles from a Rapidly Quenched Point Source, J. Phys. Chem. C, 120, 621–630, https://doi.org/10.1021/acs.jpcc.5b06503, 2016.
Fissan, H., Ristig, S., Kaminski, H., Asbach, C., and Epple, M.: Comparison of different characterization methods for nanoparticle dispersions before and after aerosolization, Anal. Methods, 6, 7324, https://doi.org/10.1039/C4AY01203H, 2014.
Fuchs, N. A.: On the stationary charge distribution on aerosol particles in a bipolar ionic atmosphere, Geofisica Pura e Applicata, 56, 185–193, https://doi.org/10.1007/BF01993343, 1963.
Gao, F. and Gu, Z.: Melting Temperature of Metallic NanoparticlesMetal nanoparticlessynthetic methods, in: Handbook of Nanoparticles, edited by: Aliofkhazraei, M., Springer International Publishing, Cham, 1–25, https://doi.org/10.1007/978-3-319-13188-7_6-1, 2015.
Gao, J., Liu, Q., Gu, F., Liu, B., Zhong, Z., and Su, F.: Recent advances in methanation catalysts for the production of synthetic natural gas, RSC Adv., 5, 22759–22776, https://doi.org/10.1039/C4RA16114A, 2015.
Gfeller, B.: Data on Metal Nanoparticle Paper, OSF [data set], https://doi.org/10.17605/OSF.IO/ZM3G4, 2024.
Grammatikopoulos, P., Cassidy, C., Singh, V., and Sowwan, M.: Coalescence-induced crystallisation wave in Pd nanoparticles, Sci. Rep., 4, 5779, https://doi.org/10.1038/srep05779, 2014.
Gudikandula, K. and Charya Maringanti, S.: Synthesis of silver nanoparticles by chemical and biological methods and their antimicrobial properties, J. Exp. Nanosci., 11, 714–721, https://doi.org/10.1080/17458080.2016.1139196, 2016.
Guo, D., Xie, G., and Luo, J.: Mechanical properties of nanoparticles: basics and applications, J. Phys. D, 47, 013001, https://doi.org/10.1088/0022-3727/47/1/013001, 2013.
Hallberg, R. T., Ludvigsson, L., Preger, C., Meuller, B. O., Dick, K. A., and Messing, M. E.: Hydrogen-assisted spark discharge generated metal nanoparticles to prevent oxide formation, Aerosol Sci. Tech., 52, 347–358, https://doi.org/10.1080/02786826.2017.1411580, 2018.
Harra, J., Juuti, P., Haapanen, J., Sorvali, M., Roumeli, E., Honkanen, M., Vippola, M., Yli-Ojanperä, J., and Mäkelä, J. M.: Coating of Silica and Titania Aerosol Nanoparticles by Silver Vapor Condensation, Aerosol Sci. Tech., 49, 767–776, https://doi.org/10.1080/02786826.2015.1072263, 2015.
He, Z., Zhang, Z., and Bi, S.: Nanoparticles for organic electronics applications, Mater. Res. Express, 7, 012004, https://doi.org/10.1088/2053-1591/ab636f, 2020.
Hejral, U., Vlad, A., Nolte, P., and Stierle, A.: In Situ Oxidation Study of Pt Nanoparticles on MgO(001), J. Phys. Chem. C, 117, 19955–19966, https://doi.org/10.1021/jp404698k, 2013.
Hinds, W. C.: Aerosol Technology: Properties, Behavior, and Measurement of Airborne Particles, Subsequent edition, Wiley-Interscience, New York, ISBN 978-1-119-49404-1, 1999.
Huhtamäki, T., Tian, X., Korhonen, J. T., and Ras, R. H. A.: Surface-wetting characterization using contact-angle measurements, Nat. Protoc., 13, 1521–1538, https://doi.org/10.1038/s41596-018-0003-z, 2018.
Jamkhande, P. G., Ghule, N. W., Bamer, A. H., and Kalaskar, M. G.: Metal nanoparticles synthesis: An overview on methods of preparation, advantages and disadvantages, and applications, J. Drug Deliv. Sci. Tec., 53, 101174, https://doi.org/10.1016/j.jddst.2019.101174, 2019.
Jennings, T. and Strouse, G.: Past, Present, and Future of Gold Nanoparticles, in: Bio-Applications of Nanoparticles, edited by: Chan, W. C. W., Springer, New York, NY, 34–47, https://doi.org/10.1007/978-0-387-76713-0_3, 2007.
Jones, F. L.: Electrode Erosion by Spark Discharges, Br. J. Appl. Phys., 1, 60, https://doi.org/10.1088/0508-3443/1/3/302, 1950.
José-Yacamán, M., Gutierrez-Wing, C., Miki, M., Yang, D.-Q., Piyakis, K. N., and Sacher, E.: Surface Diffusion and Coalescence of Mobile Metal Nanoparticles, J. Phys. Chem. B, 109, 9703–9711, https://doi.org/10.1021/jp0509459, 2005.
Jung, W., Jung, Y.-H., Pikhitsa, P. V., Feng, J., Yang, Y., Kim, M., Tsai, H.-Y., Tanaka, T., Shin, J., Kim, K.-Y., Choi, H., Rho, J., and Choi, M.: Three-dimensional nanoprinting via charged aerosol jets, Nature, 592, 54–59, https://doi.org/10.1038/s41586-021-03353-1, 2021.
Kangasluoma, J., Cai, R., Jiang, J., Deng, C., Stolzenburg, D., Ahonen, L. R., Chan, T., Fu, Y., Kim, C., Laurila, T. M., Zhou, Y., Dada, L., Sulo, J., Flagan, R. C., Kulmala, M., Petäjä, T., and Lehtipalo, K.: Overview of measurements and current instrumentation for 1–10 nm aerosol particle number size distributions, J. Aerosol Sci., 148, 105584, https://doi.org/10.1016/j.jaerosci.2020.105584, 2020.
Karlsson, L. S., Deppert, K., and Malm, J.-O.: Size Determination of Au Aerosol Nanoparticles by Off-Line TEM/STEM Observations, J. Nanopart. Res., 8, 971–980, https://doi.org/10.1007/s11051-006-9094-5, 2006.
Khan, I., Saeed, K., and Khan, I.: Nanoparticles: Properties, applications and toxicities, Arab. J. Chem., 12, 908–931, https://doi.org/10.1016/j.arabjc.2017.05.011, 2019.
Kinloch, A. J.: Adhesion and Adhesives, Springer Netherlands, Dordrecht, https://doi.org/10.1007/978-94-015-7764-9, 1987.
Kofman, R., Cheyssac, P., Aouaj, A., Lereah, Y., Deutscher, G., Ben-David, T., Penisson, J. M., and Bourret, A.: Surface melting enhanced by curvature effects, Surf. Sci., 303, 231–246, https://doi.org/10.1016/0039-6028(94)90635-1, 1994.
Kumari, S., Raturi, S., Kulshrestha, S., Chauhan, K., Dhingra, S., András, K., Thu, K., Khargotra, R., and Singh, T.: A comprehensive review on various techniques used for synthesizing nanoparticles, Journal of Materials Research and Technology, 27, 1739–1763, https://doi.org/10.1016/j.jmrt.2023.09.291, 2023.
Labat, F., Baranek, P., and Adamo, C.: Structural and Electronic Properties of Selected Rutile and Anatase TiO2 Surfaces: An ab Initio Investigation, J. Chem. Theory Comput., 4, 341–352, https://doi.org/10.1021/ct700221w, 2008.
Lähde, A., Raula, J., and Kauppinen, E. I.: Combined synthesis and in situ coating of nanoparticles in the gas phase, J. Nanopart. Res., 10, 121–130, https://doi.org/10.1007/s11051-008-9399-7, 2008.
Lehtinen, K. E. J. and Zachariah, M. R.: Energy accumulation in nanoparticle collision and coalescence processes, J. Aerosol Sci., 33, 357–368, https://doi.org/10.1016/S0021-8502(01)00177-X, 2002.
Loizidis, C., Petallidou, K. C., Maisser, A., Bezantakos, S., Pfeiffer, T. V., Schmidt-Ott, A., and Biskos, G.: Insights into the enhancement of nanoparticle production throughput by atmospheric-pressure spark ablation, Aerosol Sci. Tech., 58, 1421–1431, https://doi.org/10.1080/02786826.2024.2403578, 2024.
Lopez, N.: On the origin of the catalytic activity of gold nanoparticles for low-temperature CO oxidation, J. Catal., 223, 232–235, https://doi.org/10.1016/j.jcat.2004.01.001, 2004.
Lu, C.-H. and Jagannathan, R.: Cerium-ion-doped yttrium aluminum garnet nanophosphors prepared through sol-gel pyrolysis for luminescent lighting, Appl. Phys. Lett., 80, 3608–3610, https://doi.org/10.1063/1.1475772, 2002.
Meuller, B. O., Messing, M. E., Engberg, D. L. J., Jansson, A. M., Johansson, L. I. M., Norlén, S. M., Tureson, N., and Deppert, K.: Review of Spark Discharge Generators for Production of Nanoparticle Aerosols, Aerosol Sci. Tech., 46, 1256–1270, https://doi.org/10.1080/02786826.2012.705448, 2012.
Molina, L. M. and Hammer, B.: Some recent theoretical advances in the understanding of the catalytic activity of Au, Appl. Catal. A-Gen., 291, 21–31, https://doi.org/10.1016/j.apcata.2005.01.050, 2005.
Moskal, A. and Payatakes, A. C.: Estimation of the diffusion coefficient of aerosol particle aggregates using Brownian simulation in the continuum regime, J. Aerosol Sci., 37, 1081–1101, https://doi.org/10.1016/j.jaerosci.2005.10.005, 2006.
Murthy, S. K.: Nanoparticles in modern medicine: State of the art and future challenges, Int. J. Nanomed., 2, 129–141, 2007.
Nagarajan, R.: Nanoparticles: Building Blocks for Nanotechnology, in: Nanoparticles: Synthesis, Stabilization, Passivation, and Functionalization, vol. 996, American Chemical Society, 2–14, https://doi.org/10.1021/bk-2008-0996.ch001, 2008.
Olszok, V., Bierwirth, M., and Weber, A. P.: Interaction of Reactive Gases with Platinum Aerosol Particles at Room Temperature: Effects on Morphology and Surface Properties, Nanomaterials, 11, 2266, https://doi.org/10.3390/nano11092266, 2021.
Olszok, V., Bierwirth, M., and Weber, A. P.: Creation of Gases with Interplanetary Oxygen Concentration at Atmospheric Pressure by Nanoparticle Aerosol Scavengers: Implications for Metal Processing from nm to mm Range, ACS Appl. Nano Mater., 6, 1660–1666, https://doi.org/10.1021/acsanm.2c04585, 2023.
Olszok, V., Rembe, P., and Weber, A. P.: Aerosol photoemission as a versatile tool for nanoparticle surface investigations: Evaluation of metal oxide formation and surface properties of multi-component particles, Aerosol Sci. Tech., 58, 54–69, https://doi.org/10.1080/02786826.2023.2285307, 2024.
Pashminehazar, R., Kharaghani, A., and Tsotsas, E.: Determination of fractal dimension and prefactor of agglomerates with irregular structure, Powder Technol., 343, 765–774, https://doi.org/10.1016/j.powtec.2018.10.046, 2019.
Payne, B. P., Biesinger, M. C., and McIntyre, N. S.: The study of polycrystalline nickel metal oxidation by water vapour, J. Electron Spectrosc., 175, 55–65, https://doi.org/10.1016/j.elspec.2009.07.006, 2009.
Petallidou, K. C., Ternero, P., Messing, M. E., Schmidt-Ott, A., and Biskos, G.: Tuning atomic-scale mixing of nanoparticles produced by atmospheric-pressure spark ablation, Nanoscale Adv., 5, 6880–6886, https://doi.org/10.1039/D3NA00152K, 2023.
Pfeiffer, T., Kedia, P., Messing, M., Valvo, M., and Schmidt-Ott, A.: Precursor-Less Coating of Nanoparticles in the Gas Phase, Materials, 8, 1027–1042, https://doi.org/10.3390/ma8031027, 2015.
Pfeiffer, T. V., Feng, J., and Schmidt-Ott, A.: New developments in spark production of nanoparticles, Adv. Powder Technol., 25, 56–70, https://doi.org/10.1016/j.apt.2013.12.005, 2014.
Reinmann, R. and Akram, M.: Temporal investigation of a fast spark discharge in chemically inert gases, J. Phys. D, 30, 1125, https://doi.org/10.1088/0022-3727/30/7/010, 1997.
Schlexer, P., Andersen, A. B., Sebok, B., Chorkendorff, I., Schiøtz, J., and Hansen, T. W.: Size-Dependence of the Melting Temperature of Individual Au Nanoparticles, Part. Part. Syst. Char., 36, 1800480, https://doi.org/10.1002/ppsc.201800480, 2019.
Schmidt-Ott, A. (Ed.): Spark Ablation: Building Blocks for Nanotechnology, Jenny Stanford Publishing, New York, 472 pp., https://doi.org/10.1201/9780367817091, 2019.
Schwyn, S., Garwin, E., and Schmidt-Ott, A.: Aerosol generation by spark discharge, J. Aerosol Sci., 19, 639–642, https://doi.org/10.1016/0021-8502(88)90215-7, 1988.
Seipenbusch, M., Weber, A. P., Schiel, A., and Kasper, G.: Influence of the gas atmosphere on restructuring and sintering kinetics of nickel and platinum aerosol nanoparticle agglomerates, J. Aerosol Sci., 34, 1699–1709, https://doi.org/10.1016/S0021-8502(03)00355-0, 2003.
Snellman, M., Eom, N., Messing, M. E., and Deppert, K.: A thermal evaporator for aerosol core-shell nanoparticle synthesis, J. Aerosol Sci., 175, 106276, https://doi.org/10.1016/j.jaerosci.2023.106276, 2024.
Tabrizi, N. S., Ullmann, M., Vons, V. A., Lafont, U., and Schmidt-Ott, A.: Generation of nanoparticles by spark discharge, J. Nanopart. Res., 11, 315–332, https://doi.org/10.1007/s11051-008-9407-y, 2009.
Tabrizi, N. S., Xu, Q., Van Der Pers, N. M., and Schmidt-Ott, A.: Generation of mixed metallic nanoparticles from immiscible metals by spark discharge, J. Nanopart. Res., 12, 247–259, https://doi.org/10.1007/s11051-009-9603-4, 2010.
Terna, A. D., Elemike, E. E., Mbonu, J. I., Osafile, O. E., and Ezeani, R. O.: The future of semiconductors nanoparticles: Synthesis, properties and applications, Mater. Sci. Eng. B, 272, 115363, https://doi.org/10.1016/j.mseb.2021.115363, 2021.
Tritt, T. M.: Thermal Conductivity: Theory, Properties, and Applications, Springer Science & Business Media, ISBN 978-0-306-48327-1, 2005.
Tyson, W. R. and Miller, W. A.: Surface free energies of solid metals: Estimation from liquid surface tension measurements, Surf. Sci., 62, 267–276, https://doi.org/10.1016/0039-6028(77)90442-3, 1977.
Ullmann, M., Friedlander, S. K., and Schmidt-Ott, A.: Nanoparticle Formation by Laser Ablation, J. Nanopart. Res., 4, 499–509, https://doi.org/10.1023/A:1022840924336, 2002.
Ulmer, U., Dingle, T., Duchesne, P. N., Morris, R. H., Tavasoli, A., Wood, T., and Ozin, G. A.: Fundamentals and applications of photocatalytic CO2 methanation, Nat. Commun., 10, 3169, https://doi.org/10.1038/s41467-019-10996-2, 2019.
Van Teijlingen, A., Davis, S. A., and Hall, S. R.: Size-dependent melting point depression of nickel nanoparticles, Nanoscale Adv., 2, 2347–2351, https://doi.org/10.1039/D0NA00153H, 2020.
von der Weiden, S.-L., Drewnick, F., and Borrmann, S.: Particle Loss Calculator – a new software tool for the assessment of the performance of aerosol inlet systems, Atmos. Meas. Tech., 2, 479–494, https://doi.org/10.5194/amt-2-479-2009, 2009.
Wang, G., Xu, Y.-S., Qian, P., and Su, Y.-J.: The effects of size and shape on the structural and thermal stability of platinum nanoparticles, Comp. Mater. Sci., 169, 109090, https://doi.org/10.1016/j.commatsci.2019.109090, 2019.
Wang, Y., Liu, F., He, C., Bi, L., Cheng, T., Wang, Z., Zhang, H., Zhang, X., Shi, Z., and Li, W.: Fractal Dimensions and Mixing Structures of Soot Particles during Atmospheric Processing, Environ. Sci. Technol. Lett., 4, 487–493, https://doi.org/10.1021/acs.estlett.7b00418, 2017.
Weber, A. P. and Friedlander, S. K.: In situ determination of the activation energy for restructuring of nanometer aerosol agglomerates, J. Aerosol Sci., 28, 179–192, https://doi.org/10.1016/S0021-8502(96)00062-6, 1997.
Weber, A. P., Seipenbusch, M., Thanner, C., and Kasper, G.: Aerosol Catalysis on Nickel Nanoparticles, J. Nanopart. Res., 1, 253–265, https://doi.org/10.1023/A:1010016919254, 1999.
Wu, R., Zhao, X., and Liu, Y.: Atomic insights of Cu nanoparticles melting and sintering behavior in Cu Cu direct bonding, Mater. Design, 197, 109240, https://doi.org/10.1016/j.matdes.2020.109240, 2021.
Zhang, H., Sharma, G., Dhawan, S., Dhanraj, D., Li, Z., and Biswas, P.: Comparison of discrete, discrete-sectional, modal and moment models for aerosol dynamics simulations, Aerosol Sci. Tech., 54, 739–760, https://doi.org/10.1080/02786826.2020.1723787, 2020.
Zhang, Q., Yang, Z., Ding, B., Lan, X., and Guo, Y.: Preparation of copper nanoparticles by chemical reduction method using potassium borohydride, T. Nonferr. Metal. Soc., 20, s240–s244, https://doi.org/10.1016/S1003-6326(10)60047-7, 2010.
Short summary
Metal nanoparticles (Au, Pt, Cu and Ni) were generated in the aerosol phase using spark ablation and analysed for size, shape and number concentration. Particles as small as 1 nm and up to > 60 nm show shapes from fully spherical to fractal-like as characterized by electron microscopy. Furthermore, the metal particles were mixed with TiO2 nanoparticles, and the number and size of metal particles coating the TiO2 were determined.
Metal nanoparticles (Au, Pt, Cu and Ni) were generated in the aerosol phase using spark ablation...
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