Article
Chemistry, Multidisciplinary
Hongsub Jee, Kiseok Jeon, Min-Joon Park, Jaehyeong Lee
Summary: The study successfully fabricated large-area perfectly ordered nanoporous structures on various substrates, utilizing multi-beam interference lithography and demonstrating cost-effective manufacturing processes.
APPLIED SCIENCES-BASEL
(2021)
Article
Nanoscience & Nanotechnology
Seunghwan Lee, Hye-Mi Kim, GeonHo Baek, Jin-Seong Park
Summary: In the field of semiconductor production, as the technology node of devices becomes smaller, area selective deposition (ASD) has become a promising technique for addressing overlay or self-alignment issues. Utilizing molecular layer deposition (MLD) for conformal deposition in ASD can effectively address the limitations of traditional materials and processes.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Yangkai Chen, Huan Li, Jianmei Chen, Dong Li, Mengyuan Zhang, Guanghua Yu, Lin Jiang, Yi Zong, Bin Dong, Zhoufang Zeng, Yandong Wang, Lifeng Chi
Summary: This study presents highly effective SERS substrates with self-generating nanogaps, achieving controlled high density hot spots. The emergence of multimode hot spots makes the SG SERS substrates superior in enhancement, uniformity, and reproducibility compared to traditional substrates. Therefore, SG SERS substrates can serve as excellent platforms for trace molecule detection in practical applications.
Article
Materials Science, Multidisciplinary
Shuo Sun, Feng Xu, Lili Shi, Shengji Zhou, Yanchao Zhao, Chengzuan Gao, Dunwen Zuo
Summary: This paper prepares two types of diamond cone array tools (DCATs) for precision processing by etching free-standing diamond (FSD) and microcrystalline diamond (MCD) films using double-bias assisted hot filament chemical vapor deposition (HFCVD). The performance of the newly developed free-standing diamond cone array tool (FSD-CAT) and microcrystalline diamond cone array tool (MCD-CAT) is evaluated by performing lapping experiments on monocrystalline silicon. The results show that DCATs can effectively reduce the surface roughness of silicon, with a surface roughness as low as 5 nm achieved by using a combination of both DCATs.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Shradha Suman, Dhananjay K. Sharma, Sourav Sain, Ondrej Szabo, Salila K. Sethy, Benadict Rakesh, Umapathi Balaji, Marian Marton, Marian Vojs, Susanta S. Roy, Ramasamy Sakthivel, Kamatchi Jothiramalingam Sankaran, Alexander Kromka
Summary: Vertically aligned boron-doped diamond nanostructures fabricated by reactive ion etching exhibit excellent electrical conductivity and improved characteristics for plasma illumination devices.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Physical
Xin Chen, Markus Mohr, Kai Bruehne, Hans-Joerg Fecht
Summary: The high electrical conductivity of over 100 S/cm was achieved in nanocrystalline diamond films deposited on silicon single-crystalline substrates by using a methane and hydrogen process gas mixture in an appropriate hot-filament CVD process without further dopant. Oxygen reactive-ion etching process was found to improve the diamond film surface's electron affinity, leading to a reduction in specific contact resistance. The mechanism behind the contact resistance reduction was explained qualitatively in terms of the electron affinity of the diamond surface, confirmed through XPS, AFM, and surface wetting measurements.
Article
Chemistry, Multidisciplinary
Lucie Simonova, Milan Matejka, Alexandr Knapek, Tomas Kralik, Zuzana Pokorna, Filip Mika, Tomas Fort, Ondrej Man, Pavel Skarvada, Alexandr Otahal, Pavel Cudek
Summary: This research focuses on developing a new method for creating nanostructures with high emissivity to match the needs of a selective emitter for the visible and near-infrared region in a thermophotovoltaic system. By using tungsten as the main material and optimizing the process parameters, the study successfully developed nanostructures that can potentially improve the selectivity of the thermophotovoltaic emitter.
Article
Nanoscience & Nanotechnology
Dorte R. Danielsen, Anton Lyksborg-Andersen, Kirstine E. S. Nielsen, Bjarke S. Jessen, Timothy J. Booth, Manh-Ha Doan, Yingqiu Zhou, Peter Boggild, Lene Gammelgaard
Summary: This study explores the effects of anisotropic etching with sulfur hexafluoride (SF6) on multilayer 2D materials, showing that it induces hexagonal features in transition metal dichalcogenides. Furthermore, it demonstrates that anisotropic SF6 reactive ion etching process can downsize nanostructures significantly below the resolution limit of electron beam lithography for smooth edges, sharp corners, and feature sizes.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Philipp Taus, Adrian Prinz, Heinz D. Wanzenboeck, Patrick Schuller, Anton Tsenov, Markus Schinnerl, Mostafa M. Shawrav, Michael Haslinger, Michael Muehlberger
Summary: This study demonstrates different approaches for generating sophisticated undercut T-shaped masters suitable for nanoimprint lithography, successfully fabricating single-layer and multilayer undercut T-shaped structures, which can be applied to replicate structural colors on artificial surfaces in the future.
Article
Materials Science, Multidisciplinary
Anton V. Golovanov, Nikolay V. Luparev, Sergey Yu. Troschiev, Sergei A. Tarelkin, Viktoriia S. Shcherbakova, Vitaly S. Bormashov
Summary: Surface modification of diamond is crucial for the creation of diamond quantum photonics devices. Research shows that using SF6-based plasma for diamond processing can etch diamond faster than traditional methods, and a two-step plasma processing method can produce steep diamond 3D structures suitable for nanophotonics without the need for chlorine.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2021)
Article
Electrochemistry
Jing Zhang, Zhi-yan Zhao, Zhi-qiang Zhang, Jing-xuan Pei, Xiang Yu, Yannick Coffinier, Sabine Szunerits, Rabah Boukherroub, Cheng-wu Yang
Summary: A free-standing nanostructured boron-doped diamond (BDD) electrode was fabricated through reactive ion etching (RIE) with oxygen plasma, resulting in high specific capacitance and good stability. It demonstrated excellent performance in terms of capacitance and energy density.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Physical
Doo San Kim, Yun Jong Jang, Ye Eun Kim, Hong Seong Gil, Hee Ju Kim, You Jin Ji, Hyung Yong Kim, In Ho Kim, Myoung Kwan Chae, Jong Chul Park, Geun Young Yeom
Summary: In this study, a dual exhaust system was implemented in a reactive ion beam etcher (RIBE) to control the radical flux relative to ion flux during the etching process. The additional exhausting of radicals through the inductively coupled plasma (ICP) source chamber decreased both the ICP source chamber pressure and the ratio of radical flux to ion flux. This control of the radical flux is believed to be beneficial for anisotropic etching of nanoscale features in the next generation RIBE.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Theresa Bartschmid, Fedja J. Wendisch, Amin Farhadi, Gilles R. Bourret
Summary: Vertically aligned silicon nanowire arrays have remarkable optical properties that enhance light absorption and reduce light reflection, which is beneficial for improving solar cell design. Through chemical and electrochemical methods, we have successfully structured and patterned the nanowire arrays in three dimensions, achieving spatially controlled optical properties.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Engineering, Aerospace
Hanshin Lee, Menelaos K. Poutous
Summary: This study reports the fabrication of a binary-phase astronomical diffraction grating embedded in a quartz substrate using reactive ion plasma etching. The grating exhibits high diffraction efficiency and is suitable for a wide range of spectroscopic applications, especially in challenging astronomical observations.
JOURNAL OF ASTRONOMICAL TELESCOPES INSTRUMENTS AND SYSTEMS
(2022)
Article
Nanoscience & Nanotechnology
Yuting Zheng, Yanhui Liu, Lin Wang, Jinlong Liu, Junjun Wei, Liangxian Chen, Kang An, Xiaotong Zhang, Haitao Ye, Haojun Zhou, Hongliang Tao, Yuhang Yin, Xiaoping Ouyang, Chengming Li
Summary: The performance of boron-doped diamond hollow nanoneedle array was enhanced through surface state modulation. By controlling the surface roughness and boron concentration, a uniform and dense nanoneedle array was constructed. After hydrogen plasma treatment, the nanoneedle array showed excellent field emission stability and desirable current density.
ACS APPLIED NANO MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
O. Romanyuk, J. Zemek, J. Houdkova, O. Babcenko, E. Shagieva, K. Beranova, A. Kromka, P. Jiricek
Summary: A hydrogenated nanocrystalline diamond (NCD-H) film was prepared using chemical vapor deposition (CVD) method, and the surface destruction and graphitization of NCD-H were achieved through Ar ion bombardment by monoatomic beam (Ar+) and cluster ion beam (ArCIB). ArCIB bombardment resulted in the formation of a thin altered layer on the surface of NCD-H, while Ar+ beam bombardment created a thicker, homogeneous altered layer. Multiple microscopy and spectroscopy methods were used to evaluate the contribution of C-Hx bonds to the asymmetry of the C 1s core level line shape and measure the H concentration on the surface. The study demonstrates the limitations of Auger spectroscopy (D-parameter) analysis for measuring the sp2/sp3 phase concentration on rough NCD-H surfaces. The controllable amorphization or graphitization of diamond surface can enhance its functionality in detectors, electrochemical sensing, or supercapacitor applications.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Athanasios Koliogiorgos, Tomas Polcar, Bohuslav Rezek
Summary: The interaction between protoporphyrin molecules and Si nanocrystals is studied using different methods. The results show electron charge transfer and energy transfer effects depending on the orientation and distance between the molecules. A distance-dependent fluorescence resonance energy transfer (FRET) is observed, and smaller Si nanocrystals have larger couplings. The addition of plasmon nanoparticles as a bridge enhances the coupling, and using Au nanoparticles shows increased energy transfer rates and lower distance dependence.
JOURNAL OF COMPUTATIONAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Egor Ukraintsev, Hadi Hematian, Bohuslav Rezek
Summary: This study investigates the effect of surface polarity of zinc oxide (ZnO) on the adsorption of thiorphan, a small molecule with important biological roles. The results show that polar ZnO surfaces form thiorphan nanodots, while nonpolar ZnO surfaces self-assemble into layered nanoislands. The findings provide insights for controlling the assembly of thiorphan and other molecular nanomaterials for diverse applications.
Article
Chemistry, Multidisciplinary
Frantisek Trojanek, Karol Hamracek, Martin Hanak, Marian Varga, Alexander Kromka, Oleg Babcenko, Lukas Ondic, Petr Maly
Summary: Diamond thin films with a high-density of light-emitting negatively charged silicon vacancy (SiV) centers can be prepared at a relatively low cost, which has potential applications in photonics or sensing. The composition of the films, which consist of diamond grains with SiV centers and sp(2)-carbon phase, can be adjusted by changing the preparation conditions. Surface defects and the sp(2)-related defects in the grains can trap the carriers excited within the SiV centers, leading to a decrease in their internal photoluminescence (PL) quantum efficiency.
Article
Nanoscience & Nanotechnology
Denis Zabelin, Kamil Severa, Jaroslav Kulicek, Bohuslav Rezek, Anastasiia Tulupova, Roman Elashnikov, Anna Zabelina, Vasilii Burtsev, Petr Sajdl, Elena Miliutina, Vaclav Svorcik, Oleksiy Lyutakov
Summary: In this study, a specific structure based on WO3-x/CdWO4/CdS coupled semiconductors was proposed and prepared. The structure, created by annealing a commonWO(3)/CdS direct Z-scheme, was further combined with a plasmon-active grating to achieve the artificial leaf design and complete utilization of the sunlight spectrum. The proposed structure enables efficient water splitting without catalyst photodegradation.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Instruments & Instrumentation
Jakub Budil, Pavla Stenclova, Alexander Kromka, Petra Liskova
Summary: In this study, infrared attenuated total reflection spectroscopy coupled with optical and confocal laser scanning microscopy was used to analyze the real-time development of Pseudomonas syringae biofilm. The kinetics of representative band areas in the spectral window 4000-800 cm(-1) were analyzed to characterize different developmental stages of the biofilm.
APPLIED SPECTROSCOPY
(2023)
Article
Materials Science, Multidisciplinary
Katerina Kolarova, Irena Bydzovska, Oleksandr Romanyuk, Ekaterina Shagieva, Egor Ukraintsev, Alexander Kromka, Bohuslav Rezek, Stepan Stehlik
Summary: Hydrogenation of the surface provides specific and unique properties to nanodiamonds. In this study, high-pressure high-temperature nanodiamonds (HPHT NDs) with varying levels of hydrogenation and sp2 carbon content were prepared and characterized. Higher surface sp2-C content and hydrogenation levels led to better dispersibility in acidic to neutral pH and higher isoelectric points. Chitosan was found to electrostatically attract hydrogenated HPHT NDs, improving their dispersibility and providing colloidal stability in a wide pH range of 2-11. Chitosan coating enables the decoration of hydrogenated HPHT NDs with silver nanoparticles.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Oksana Gutsul, Ondrej Szabo, Nirmal Kumar, Rene Pfeifer, Branislav Dzurnak, Kezia Sasitharan, Vsevolod Slobodyan, Alexander Kromka, Bohuslav Rezek
Summary: MXenes have unique properties that make them promising materials for sustainable energy technologies, including high electrical conductivity, hydrophilicity, excellent thermal stability, large interlayer spacing, easily tunable structure, high surface area, and microporous structure that facilitate faster ion transfer. This study compares the electrical properties of MXene thin films prepared from aqueous and non-aqueous solvents. The results show that MXene deposited from the non-aqueous solvent DMF exhibits higher electrical conductivity than that deposited from NMP. This suggests that MXene thin films prepared from non-aqueous solvents may have potential applications as charge-transporting layers in hybrid photovoltaic devices.
JOURNAL OF MATERIALS RESEARCH
(2023)
Article
Energy & Fuels
Aurelien Sokeng Djoumessi, Anastasia Sichwardt, Daria Miliaieva, Jan Cermak, Maximilian Schaal, Felix Otto, Stepan Stehlik, Jaroslav Kulicek, Vojtech Nadazdy, Torsten Fritz, Alexander Kromka, Bohuslav Rezek, Ulrich S. S. Schubert, Harald Hoppe
Summary: Diamond nanoparticles, also known as nanodiamonds, have attracted scientific interest due to their optical and electronic properties, nontoxicity, biocompatibility, and large surface area. The versatility of the surface chemistry of nanodiamonds allows for the attachment of various functional groups, providing a platform for adjusting their properties and functions. In this study, high-pressure high-temperature nanodiamonds were tested as charge extraction material in organic solar cells, and hydrogenated nanodiamonds were found to be effective for electron extraction.
Article
Nanoscience & Nanotechnology
Michal Koci, Tibor Izsak, Gabriel Vanko, Michaela Sojkova, Jana Hrda, Ondrej Szabo, Miroslav Husak, Karol Vegso, Marian Varga, Alexander Kromka
Summary: This study synthesizes MoS2 and H-NCD thin films using appropriate physical/chemical deposition methods, and analyzes their performance in gas sensing properties. The results show that the MoS2/H-NCD heterostructure-based gas sensor exhibits improved sensitivity to oxidizing NO2 and reducing NH3 gases. Different gas interaction model pathways were developed to describe the current flow mechanism through the sensing area.
ACS APPLIED MATERIALS & INTERFACES
(2023)
