Searched for: subject%3A%22platinum%22
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van Bree, Arnoud (author)
Palladium is a critical raw material that is considered economically and strategically important by various national governments. The palladium supply chain is subject to several supply chain risks, including the geopolitical risk of potential Russian palladium export restrictions. Considering these disruption risks, it is essential to gain...
master thesis 2024
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Zhao, Pengcheng (author), Guo, W. (author), Gui, Zhipeng (author), Jiang, Jie (author), Zhu, Zhihua (author), Li, Jin Jin (author), Zhao, Ling (author), Zhou, Jian (author), Xi, Zhenhao (author)
Upcycling of waste plastics into value-added chemicals and fuels represents a promising orientation toward a more sustainable chemical industry. We present a selective process for hydrocracking waste polyolefins into a spectrum of branched gasoline-range C<sub>5-12</sub> hydrocarbons, utilizing a cerium-promoted Pt/HY as a metal-acid...
journal article 2024
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Rice, Samantha (author)
Numerous advancements have been made in transparent electrode technologies that can complement optogenetics and imaging modalities. However, several obstacles restrict the design and material of electrode devices, including the required flexibility, transparency, low impedance, high charge storage<br/>capacity (CSC), and high charge injection...
master thesis 2023
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Kluba, M.M. (author)
The progress in the field of neurostimulation is impressive, both from a technical as well as from a therapeutic point of view. Nowadays, the electrical stimulation of the nervous system can be used to induce or suppress muscle responses. Additionally, it can also influence hearing, vision, immune system response, pain perception, and even...
doctoral thesis 2022
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Nanbakhsh, K. (author), Ritasalo, R. (author), Serdijn, W.A. (author), Giagka, Vasiliki (author)
In this work, we investigate the insulating performance of an atomic layer deposited (ALD) HfO2 - polymer bilayer for platinum (Pt) metallization. As test vehicles, Pt interdigitated comb structures (IDC) were designed and fabricated on SiO2/Si substrates. The IDCs were first coated with a 100 nm thin HfO2 ALD layer. A group of samples was...
conference paper 2020
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Mahgoub, A.M.I.M. (author), Lu, Hang (author), Thorman, Rachel M. (author), Preradovic, Konstantin (author), Jurca, Titel (author), McElwee-White, Lisa (author), Fairbrother, Howard (author), Hagen, C.W. (author)
Two platinum precursors, Pt(CO)<sub>2</sub>Cl<sub>2</sub> and Pt(CO)<sub>2</sub>Br<sub>2</sub>, were designed for focused electron beam-induced deposition (FEBID) with the aim of producing platinum deposits of higher purity than those deposited from commercially available precursors. In this work, we present the first deposition experiments...
journal article 2020
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Sokolovskij, R. (author), Zhang, Jian (author), Zheng, Hongze (author), Li, Wenmao (author), Jiang, Yang (author), Yang, Gaiying (author), Yu, Hongyu (author), Sarro, Pasqualina M (author), Zhang, Kouchi (author)
The present work reports on the hydrogen gas detection properties of Pt-AlGaN/GaN high electron mobility transistor (HEMT) sensors with recessed gate structure. Devices with gate recess depths from 5 to 15 nm were fabricated using a precision cyclic etching method, examined with AFM, STEM and EDS, and tested towards H2 response at high...
journal article 2020
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Grillo, F. (author)
Atomic layer deposition (ALD) is a gas-phase thin film technology that boasts atomic-level control over the amount of material being deposited. A great deal of research effort has been devoted to the exploitation of ALD precision for the synthesis of nanostructures other than thin films such as supported nanoparticles (NPs). ALD is not only...
doctoral thesis 2018
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Coccia, F. (author), Tonucci, Lucia (author), Del Boccio, Piero (author), Caporali, Stefano (author), Hollmann, F. (author), D’Alessandro, Nicola (author)
The combination of metal nanoparticles (Pd or Pt NPs) with NAD-dependent thermostable alcohol dehydrogenase (TADH) resulted in the one-flask catalytic double reduction of 3-methyl-2-cyclohexenone to 3-(1S,3S)-methylcyclohexanol. In this article some assumptions about the interactions between a chemocatalyst and a biocatalyst have been...
journal article 2018
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Negro, E. (author)
Graphitic materials have attracted a great interest in the field of sustainable energy production and storage because of their excellent electrical, mechanical and chemical properties. This thesis modestly contributes to this global research by investigating new interconnected carbon nanostructures, here called Carbon Nano-Networks (CNNs). The...
doctoral thesis 2014
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Latsuzbaia, R. (author), Negro, E. (author), Koper, G.J.M. (author)
Platinum nanoparticles, which are used as catalysts in Proton Exchange Membrane Fuel Cells (PEMFC), tend to degrade after long-term operation. We discriminate the following mechanisms of the degradation: poisoning, migration and coalescence, dissolution, and electrochemical Ostwald ripening. There are two ways to tackle this problem. The first...
conference paper 2013
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Latsuzbaia, R. (author), Negro, E. (author), Koper, G.J.M. (author)
Platinum nanoparticles, which are used as catalysts in Proton Exchange Membrane Fuel Cells (PEMFC), tend to degrade after long-term operation. We discriminate the following mechanisms of the degradation: poisoning, migration and coalescence, dissolution, and electrochemical Ostwald ripening. There are two ways to tackle this problem. The first...
conference paper 2013
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Klifman, E.H.A. (author)
The Potgietersus Platinum mine is an open pit mine in the Bushveld Complex in South Africa. During the mining different rock types are mined, some of these are detrimental. The goal of the research done in this project is to assess the feasibility of Dual Energy X-ray Transmission (DE-XRT) to distinguish the detrimental ore types from the rest...
bachelor thesis 2013
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Dabirian, A. (author), Van de Krol, R. (author)
In this study, we explore resonance-enhanced optical absorption in Ta3N5 photoanodes for water splitting. By using a reflecting Pt back-contact and appropriate Ta3N5 film thickness, the resonance frequency can be tuned to energies just above the bandgap, where the optical absorption is normally weak. The resonance results in a significant...
journal article 2013
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Alkemade, P.F.A. (author), Miro, H. (author), Van Veldhoven, E. (author), Maas, D.J. (author), Smith, D.A. (author), Rack, P.D. (author)
The sub-nanometer beam of a helium ion microscope was used to study and optimize helium-ion beam induced deposition of PtC nanopillars with the (CH3)3Pt(CPCH3) precursor. The beam current, beam dwell time, precursor refresh time, and beam focus have been independently varied. Continuous beam exposure resulted in narrow but short pillars, while...
journal article 2011
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Post, P.C. (author), Mohammadi-Gheidari, A. (author), Hagen, C.W. (author), Kruit, P. (author)
Lithography techniques based on electron-beam-induced processes are inherently slow compared to light lithography techniques. The authors demonstrate here that the throughput can be enhanced by a factor of 196 by using a scanning electron microscope equipped with a multibeam electron source. Using electron-beam induced deposition with MeCpPtMe3...
journal article 2011
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Alkemade, P.F.A. (author), Chen, P. (author), Van Veldhoven, E. (author), Maas, D. (author)
An analytical model for the growth of nanopillars by helium ion-beam-induced deposition is presented and compared to experimental data. This model describes the competition between pillar growth in vertical and lateral directions. It assumes that vertical growth is induced by incident primary ions and type-1 secondary electrons, whereas lateral...
journal article 2010
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Sanford, C.A. (author), Stern, L. (author), Barriss, L. (author), Farkas, L. (author), DiManna, M. (author), Mello, R. (author), Maas, D.J. (author), Alkemade, P.F.A. (author)
Helium ion microscopy is now a demonstrated practical technology that possesses the resolution and beam currents necessary to perform nanofabrication tasks, such as circuit edit applications. Due to helium’s electrical properties and sample interaction characteristics relative to gallium, it is likely that the properties and deposition...
journal article 2009
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Botman, A. (author), Hagen, C.W. (author), Li, J. (author), Thiel, B.L. (author), Dunn, K.A. (author), Mulders, J.J.L. (author), Randolph, S. (author), Toth, M. (author)
The material grown in a scanning electron microscope by electron beam-induced deposition (EBID) using Pt(PF3)4 precursor is shown to be electron beam sensitive. The effects of deposition time and postgrowth electron irradiation on the microstructure and resistivity of the deposits were assessed by transmission electron microscopy, selected area...
journal article 2009
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Sidorkin, V.A. (author), Alkemade, P.F.A. (author), Salemink, H.W.M. (author), Schmits, R. (author), Van der Drift, E. (author)
A method for improving the aspect ratio of ultrahigh-resolution structures in negative electron-beam resist is provided for enhanced pattern-transfer capabilities. The essence of the proposed method is to form a protective “cap” on top of the resist structure by means of electron-beam-induced deposition (EBID) in a self-aligned approach. This is...
journal article 2009
Searched for: subject%3A%22platinum%22
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