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Št. zadetkov: 8
Ultrasonic photoacoustic emitter of graphene-nanocomposites film on a flexible substrate
Daniele Vella, Aleš Mrzel, Aljaž Drnovšek, Vasyl Shvalya, Matija Jezeršek
Izvirni znanstveni članek
Oznake: kompoziti;fotoakustični materiali;laserski ultrazvoki;fotoakustične leče;akustična kavitacija;ultrasonic photoacoustic composite;photoacoustic materials;laser ultrasonics;photoacoustic lens;acoustic cavitation;
Photoacoustic devices generating high-amplitude and high-frequency ultrasounds are attractive candidates for medical therapies and on-chip bio-applications. Here, we report the photoacoustic response of graphene nanoflakes – Polydimethylsiloxane composite. A protocol was developed to obtain well-dis ...
Leto: 2022 Vir: Fakulteta za strojništvo (UL FS)
Structural Insights and hydrogen retention in amorphous and crystalline tungsten oxide films
Janez Zavašnik, Vasyl Shvalya, Kristof Kremer, Thomas Schwarz-Selinger, Wolfgang Jacob
Izvirni znanstveni članek
Oznake: tungsten;vodikovi izotopi;strukture kristalov;
We investigated structural characteristics of and hydrogen isotope interactions with thermally and electro chemically synthesized tungsten oxide (W-oxide) thin films (≤50 nm). Specifically, we assessed whether elec trochemically synthesized W-oxide could serve as a suitable proxy for thermally grown ...
Leto: 2025 Vir: Institut Jožef Stefan (IJS)
Plasma-tunable metasurfaces for SERS nanosensing of hazardous chemicals
Vasyl Shvalya, Andrii Breus, Oleg Baranov, Damjan Vengust, Janez Zavašnik, Uroš Cvelbar
Izvirni znanstveni članek
Oznake: plasmonic sensors;surface enhanced Raman scattering;
The demand for rapid, field-deployable detection of hazardous substances has intensified the search for plasmonic sensors with both high sensitivity and fabrication simplicity. Conventional approaches to plasmonic substrates, however, often rely on lithographic precision or complex chemistries limit ...
Leto: 2025 Vir: Institut Jožef Stefan (IJS)
Advancing oxygen evolution catalysis with dual-phase nickel sulfide nanostructures
Neelakandan Marath Santhosh, Suraj Gupta, Vasyl Shvalya, Martin Košiček, Janez Zavašnik, Uroš Cvelbar
Izvirni znanstveni članek
Oznake: elektrokatalizatorji;electrocatalysts;
The production, conversion and storage of energy based on electrocatalysis, mainly assisted by oxygen evolution reaction (OER), plays a crucial role in alkaline water electrolyzers (AWEs) and fuel cells. Nevertheless, the insufficient availability of highly efficient catalyst materials at a reasonab ...
Leto: 2025 Vir: Institut Jožef Stefan (IJS)
Bacterial DNA recognition by SERS active plasma-coupled nanogold
Vasyl Shvalya, Martina Modic, Cene Skubic, Nejc Nadižar, Janez Zavašnik, Damjan Vengust, Aleksander Zidanšek, Damjana Rozman, Uroš Cvelbar
Izvirni znanstveni članek
Oznake: DNA genomic ration;plasma electrochemical reduction;coupled plasmonic nanogold;DNA Raman fingerprints;
It is shown that surface-enhanced Raman spectroscopy (SERS) can identify bacteria based on their genomic DNA composition, acting as a “sample-distinguishing marker”. Successful spectral differentiation of bacterial species was accomplished with nanogold aggregates synthesized through single-step pla ...
Leto: 2022 Vir: Medicinska fakulteta (UL MF)
Near-surface processes of beam-sensitive materials under low energy electron irradiation
Ibrahim Hameli, Vasyl Shvalya, Neelakandan Marath Santhosh, Ardita Kurtishaj Hamzaj, Oleg Baranov, Uroš Cvelbar, Janez Zavašnik
Izvirni znanstveni članek
Oznake: materiali;elektronsko sevanje;beam sensitive materials;electron beam interactions;electron radiation;gold chloride;carbon deposition;
We investigate the interactions and modifications induced by low-energy electron beam irradiation in beamsensitive materials, with crystalline gold trichloride (AuCl3) as a model system. Employing scanning electron microscopy (SEM) coupled with energy-dispersive X-ray spectroscopy (EDS) in an operan ...
Leto: 2026 Vir: Institut Jožef Stefan (IJS)
Janus nanocellulose membrane by nitrogen plasma
Ana Oberlintner, Vasyl Shvalya, Neelakandan Marath Santhosh, Martin Košiček, Ivan Jerman, Matej Huš, Uroš Cvelbar, Uroš Novak, Blaž Likozar
Izvirni znanstveni članek
Oznake: : biokemija;celuloza;nanoceluloza;raziskave;
Leto: 2024 Vir: Kemijski inštitut (KI)
Addressing SERS challenges of nanoplastics with vertical plasmonic substrates
Vasyl Shvalya, Neelakandan Marath Santhosh, Damjan Vengust, Tina Radošević, Matejka Podlogar, Matija Milanič, Hiroki Kondo, Masaru Hori, Uroš Cvelbar
Izvirni znanstveni članek
Oznake: nanoplastika;nanoplastics;surface enhanced Raman scattering;vertical nanostructures;plasmonics;nanowalls;
Nanoplastics, an increasingly concerning environmental pollutant, are extremely difficult to detect using conventional analytical techniques. Many methods fail in this regard, but surface-enhanced Raman scattering (SERS) offers a promising solution by utilising specialised nanostructures that amplif ...
Leto: 2025 Vir: Fakulteta za matematiko in fiziko (UL FMF)
Št. zadetkov: 8
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