Stephan Barcikowski
University of Duisburg-Essen
ParticleColloidal goldAnalytical chemistryOpticsNanomaterialsNanoparticleComposite materialNanotechnologyChemistryParticle sizeMaterials scienceFluenceAblationLaser ablationAlloyChemical engineeringOptoelectronicsLaserPolymerColloid
Publications 363
#1Shun-Xing Liang (University of Duisburg-Essen)H-Index: 1
#1Shun-Xing Liang (University of Duisburg-Essen)H-Index: 1
Last. Stephan Barcikowski (University of Duisburg-Essen)H-Index: 59
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Abstract null null Phase control, especially for amorphous phase, is challenging with pulsed laser ablation in liquid (LAL), where ablated materials experience crystallization even at extreme cooling rate during particle solidification processes. Here, metallic glass nanoparticles (MG-NPs) were prepared by picosecond-laser ablation of a Fe78Si9B13 metallic glass (MG) in several organic solvents (i.e. ethanol, acetone, acetonitrile). The employment of ternary MG precursor effectively avoids eleme...
#1Ruksan Nadarajah (University of Duisburg-Essen)H-Index: 3
#2Leyla Tasdemir (University of Duisburg-Essen)
Last. Bilal Gökce (University of Duisburg-Essen)H-Index: 24
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Magnetic-field-induced strand formation of ferromagnetic Fe-Ni nanoparticles in a PMMA-matrix is correlated with the intrinsic material parameters, such as magnetization, particle size, composition, and extrinsic parameters, including magnetic field strength and viscosity. Since various factors can influence strand formation, understanding the composite fabrication process that maintains the strand lengths of Fe-Ni in the generated structures is a fundamental step in predicting the resulting str...
#1Shima Alinejad (University of Bern)H-Index: 4
#2Jonathan Quinson (UCPH: University of Copenhagen)H-Index: 13
Last. Matthias Arenz (University of Bern)H-Index: 51
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Much research effort has been devoted to the development of effective catalysts for the electrochemical reduction of CO2 (CO2RR). For CO2RR, the most common catalyst screening method is performed in a H-cell configuration where the reactant CO2 gas is usually dissolved in an aqueous bicarbonate-based electrolyte. However, the low solubility of CO2 in aqueous solutions (∼35 mM at 298 K and 1 atm pressure) causes mass transport limitations in such setups. Based on H-cell measurements gold (Au) is ...
#1Vaijayanthi Ramesh (University of Duisburg-Essen)H-Index: 1
#2Christoph Rehbock (University of Duisburg-Essen)H-Index: 19
Last. Stephan Barcikowski (University of Duisburg-Essen)H-Index: 59
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Electrophoretic deposition (EPD) of platinum nanoparticles (PtNPs) on platinum-iridium (Pt-Ir) neural electrode surfaces is a promising strategy to tune the impedance of electrodes implanted for deep brain stimulation in various neurological disorders such as advanced Parkinson's disease and dystonia. However, previous results are contradicting as impedance reduction was observed on flat samples while in three-dimensional (3D) structures, an increase in impedance was observed. Hence, defined cor...
#1Eko Budiyanto (MPG: Max Planck Society)H-Index: 3
#2Swen Zerebecki (University of Duisburg-Essen)H-Index: 1
Last. Stephan Barcikowski (University of Duisburg-Essen)H-Index: 59
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Herein, we report nanosecond, single-pulse laser post-processing (PLPP) in a liquid flat jet with precise control of the applied laser intensity to tune structure, defect sites, and the oxygen evolution reaction (OER) activity of mesostructured Co3O4. High-resolution X-ray diffraction (XRD), Raman, and X-ray photoelectron spectroscopy (XPS) are consistent with the formation of cobalt vacancies at tetrahedral sites and an increase in the lattice parameter of Co3O4 after the laser treatment. X-ray...
#1Anna Ziefuss (University of Duisburg-Essen)H-Index: 3
#2Torben Steenbock (UHH: University of Hamburg)H-Index: 6
Last. Rodolphe Antoine (UCBL: Claude Bernard University Lyon 1)H-Index: 47
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Fully inorganic, colloidal gold nanoclusters (NCs) constitute a new class of nanomaterials that are clearly distinguishable from their commonly studied metal-organic ligand-capped counterparts. As their synthesis by chemical methods is challenging, details about their optical properties remain widely unknown. In this work, laser fragmentation in liquids is performed to produce fully inorganic and size-controlled colloidal gold NCs with monomodal particle size distributions and an fcc-like struct...
1 CitationsSource
#1Yuan Zeng (UHH: University of Hamburg)H-Index: 3
#2Shana Havenridge (KSU: Kansas State University)
Last. Stephan Barcikowski (University of Duisburg-Essen)H-Index: 59
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A ligand exchange strategy has been employed to understand the role of ligands on the structural and optical properties of atomically precise 29 atom silver nanoclusters (NCs). By ligand optimization, ∼44-fold quantum yield (QY) enhancement of Ag29(BDT)12-x(DHLA)x NCs (x = 1-6) was achieved, where BDT and DHLA refer to 1,3-benzene-dithiol and dihydrolipoic acid, respectively. High-resolution mass spectrometry was used to monitor ligand exchange, and structures of the different NCs were obtained ...
#2Dongdong GuH-Index: 1
Last. Bilal GökceH-Index: 24
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2 CitationsSource
#1Shun-Xing Liang (University of Duisburg-Essen)H-Index: 1
Last. Stephan BarcikowskiH-Index: 59
view all 4 authors...
Amorphous metal nanoparticles (A-NPs) have aroused great interest in their structural disordering nature and combined downsizing strategies (e.g. nanoscaling), both of which are beneficial for highly strengthened properties compared to their crystalline counterparts. Conventional synthesis strategies easily induce product contamination and/or size limitations, which largely narrow their applications. In recent years, laser ablation in liquid (LAL) and laser fragmentation in liquid (LFL) as “gree...
1 CitationsSource
#1Alena Richter (MHH: Hannover Medical School)H-Index: 1
#2Yaya Li (University of Duisburg-Essen)H-Index: 1
Last. Ulrike Böer (MHH: Hannover Medical School)H-Index: 7
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