Article
Chemistry, Multidisciplinary
Sabine Portal, Carles Corbella, Oriol Arteaga, Alexander Martin, Trinanjana Mandal, Bart Kahr
Summary: Optically anisotropic materials form through colloidal lithography were studied using SEM, confocal microscopy, and polarimetry. A hexagonal array mask made of sub-micron silica particles was created via Langmuir-Blodgett self-assembly, and the pattern was transferred onto silicon and glass substrates using ion beam etching. Gold films were then deposited onto the etched pillars to enhance optical properties. Polarimetric measurements showed that the etching directions influenced the linear birefringence and linear dichroism, with the chiroptical responses increasing with the angle of incidence.
Review
Physics, Applied
Jian Gao, Peng Chen, Lei Wu, Bingjun Yu, Linmao Qian
Summary: Ultra-precision manufacturing is crucial for the development of various technological fields, with blazed gratings playing a significant role in improving sensitivity, resolution, and measurement range of grating measurement systems. Different fabrication methods for blazed gratings have their own advantages and disadvantages, but there is potential for future improvements in manufacturing techniques.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Nanoscience & Nanotechnology
B. Abasahl, C. Santschi, T. Raziman, O. J. F. Martin
Summary: The paper provides a detailed overview of nanofabrication techniques for plasmonics, focusing on two different approaches for the fabrication of metallic nanostructures based on e-beam lithography. Ion beam etching produces smaller and more regular features, while the lift-off process can result in slightly fuzzy nanoclusters on the substrate. Both techniques exhibit spectral differences in scattering cross sections for structures supporting complex resonances, guiding researchers to choose the best suited approach for a given application.
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
Nanoscience & Nanotechnology
Imrich Gablech, Ludovico Migliaccio, Jan Brodsky, Marek Havlicek, Pavel Podesva, Radim Hrdy, Jiri Ehlich, Maciej Gryszel, Eric Daniel Glowacki
Summary: In this study, stoichiometric TiN thin films were successfully fabricated using a dual Kaufman ion-beam source setup without substrate heating, resulting in high crystallinity and excellent electrical conductivity. Structured AlN was also produced using this method to obtain robust AlN/TiN bilayer micropyramids with superior performance metrics compared to commercial TiN microelectrodes important for bioelectronics interfaces. These results demonstrate the potential of the Kaufman ion-beam sputtering method for producing competitive nitride ceramics at low deposition temperatures for bioelectronics applications.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Adriaan J. Taal, Jake Rabinowitz, Kenneth L. Shepard
Summary: Mr-EBL is established as the highest throughput negative tone electron-beam-sensitive resist, with the ability to fabricate high-resolution nanometer-scale devices in a ten minute EBL process. Optimized processing conditions result in 3x faster write speeds compared to other materials, and the resist demonstrates robust negative etch mask properties with high aspect ratio silicon trenches and near-vertical sidewalls.
Article
Optics
Gang Wang, Jun Wang, Haitao Dai, Changlong Liu
Summary: The method of etching the metal-ion-implanted dielectric via a patterned electron beam (EB) resist mask was used to fabricate metal/glass nanocomposite arrays with improved diffractive performance. The diffraction efficiency of the Au/SiO2 nanocomposite array was influenced by the distribution depth and volume fraction of nanocomposites, which could be significantly improved by optimizing the parameters of the Au/SiO2 nanocomposite.
OPTICS COMMUNICATIONS
(2021)
Article
Nanoscience & Nanotechnology
Gyo Wun Kim, Won Jun Chang, Ji Eun Kang, Hee Ju Kim, Geun Young Yeom
Summary: This study compared the radiation damage to EUV resist during etching of hardmask materials using CF4 gas between neutral beam etching (NBE) and ion beam etching (IBE). The results showed that NBE reduced the line edge roughness increase and critical dimension change of EUV resist compared to IBE. NBE also had a lower root mean square surface roughness value of EUV resist and higher etch selectivity for materials such as Si3N4 and SiO2 over EUV resist.
Article
Chemistry, Physical
Jun-Yeong Yang, Sung-Gyu Park, Sunghoon Jung, Eun-Yeon Byeon, Do-geun Kim, Ho Sang Jung, Hyo Jung Kim, Seunghun Lee
Summary: This study utilized oxygen ion beam sputtering to fabricate gold nano-tips for surface-enhanced Raman spectroscopy (SERS), with finite-difference time-domain (FDTD) simulations showing that nano-tip structures with spacings of less than 10 nm increased the localized E field enhancement for stronger SERS signals. SERS substrates fabricated at a low energy density (5.8 J/cm²) showed higher nano-tip density and stronger Raman signal intensity compared to substrates fabricated at high energy density (17.3 J/cm²).
APPLIED SURFACE SCIENCE
(2022)
Article
Polymer Science
Jun-Yeong Yang, Sunghoon Jung, Eun-Yeon Byeon, Hyun Hwi Lee, Do-Geun Kim, Hyo Jung Kim, Ho Won Jang, Seunghun Lee
Summary: This work reports the self-organization of dimple nanostructures on a polyethylene naphthalate (PEN) surface induced by an Ar ion beam. The study found that Ar ion beam irradiation did not induce crystallization of the PEN surface, but rather led to self-organization due to the ion-induced surface instability of the amorphous layer.
Article
Chemistry, Analytical
Zhifu Feng, Damiano Giubertoni, Alessandro Cian, Matteo Valt, Mario Barozzi, Andrea Gaiardo, Vincenzo Guidi
Summary: In this study, a new method combining electron beam lithography (EBL) and focused ion beam (FIB) technologies is proposed to achieve low power consumption in MOS gas sensors. The miniaturization of the hotplate geometry is realized using this method, reducing power consumption effectively. The effectiveness and feasibility of this method are demonstrated through characterization and testing.
Article
Chemistry, Physical
Yinan Li, Jun Wang, Huixin Li, Liulian Huang, Lihui Chen, Yonghao Ni, Qinghong Zheng
Summary: Transparent actuators, made of cellulose-based film and PTFE two-layered film, show high sensitivity and stability, with bidirectional actuation achieved by controlling ambient humidity and IR light. The unique hygroscopic effect of cellulose contributes to their superior performance compared to petroleum-based actuators.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Biomedical
Mahya Ganjian, Khashayar Modaresifar, Dionysios Rompolas, Lidy E. E. Fratila-Apachitei, Amir A. A. Zadpoor
Summary: Developing a high-throughput nanopatterning technique with precise control over feature dimensions is crucial for studying cell-nanopattern interactions. This study presents a process that fulfills these criteria by using electron-beam lithography to fabricate controlled arrays of submicron pillars and developing etching procedures to create the desired height. The study demonstrates the significance of the fabricated pillars in inducing osteogenic differentiation and utilizes replication techniques to pattern bio-instructive surfaces. Overall, the method enables the precise fabrication of submicron and nanopatterns for systematic cell studies.
ACTA BIOMATERIALIA
(2022)
Article
Chemistry, Physical
Anindita Deka, Pintu Barman, M. K. Mukhopadhyay, S. R. Bhattacharyya
Summary: This study investigates the impact of surface patterning in nano-scale dimension on the wettability of solid surfaces, particularly focusing on the generation of Si nano-patterns at oblique incidence. The addition of stainless steel as seeding material during bombardment leads to a significant change in surface topography, transitioning from ripple morphology to hillocks structures. The evolution from nano-ripple to nano-hillock pattern is influenced by FeSi2 bond, resulting in increased surface hydrophobicity.
SURFACES AND INTERFACES
(2021)
Article
Chemistry, Physical
Pritam Das, Bibhudutta Rout, Unnikrishnan Manju, Shyamal Chatterjee
JOURNAL OF PHYSICAL CHEMISTRY C
(2020)
Article
Chemistry, Physical
Sriparna Chatterjee, Whitney A. Webre, Shyamapada Patra, Bibhudutta Rout, Gary A. Glass, Francis D'Souza, Shyamal Chatterjee
JOURNAL OF ALLOYS AND COMPOUNDS
(2020)
Article
Instruments & Instrumentation
Wickramaarachchige J. Lakshantha, Mohit Kumar, Tapobrata Som, Floyd D. McDaniel, Bibhudutta Rout
Summary: Nano-crystalline graphite structures were grown on insulating layers via implantation of carbon clusters on sapphire and annealing. Raman Spectroscopy and X-ray Photoelectron Spectroscopy were used to study the carbon bonding characteristics and distribution in the optimized samples. The results showed well-developed disorder, graphite, and 2D peaks indicating the formation of nano-crystalline graphite structures on the surface.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2021)
Article
Energy & Fuels
Brandon K. Durant, Hadi Afshari, Shashi Sourabh, Vishal Yeddu, Matthew T. Bamidele, Satyabrata Singh, Bibhudutta Rout, Giles E. Eperon, Do Young Kim, Ian R. Sellers
Summary: Mixed organic-inorganic halide perovskite solar cells have attracted attention for their low cost and high efficiency in optoelectronic applications. Research on mixed formamidiniummethylammonium tin-lead iodide perovskites shows their potential as absorber materials in tandem PSCs, with impressive tolerance to high energy protons despite reduced performance at low temperatures.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Chemistry, Physical
Brandon K. Durant, Hadi Afshari, Satyabrata Singh, Bibhudutta Rout, Giles E. Eperon, Ian R. Sellers
Summary: The study found that mixed organic-inorganic halide perovskite solar cells show relatively high tolerance to high-energy proton radiation, and an unexpected increase in open circuit voltage and power density is observed when proton energy is increased.
ACS ENERGY LETTERS
(2021)
Article
Chemistry, Physical
Satyabrata Singh, Bibhudutta Rout
Summary: This study investigates the redistribution of implanted ions in silicon substrates and nanowires under low-energy Co and Fe ion irradiation through simulations. The results show that the curved depth profile of silicon nanowires influences the distribution of implanted ions, with more surface sputtering observed in nanowires compared to bulk silicon substrates.
SURFACES AND INTERFACES
(2021)
Article
Physics, Applied
Sriswaroop Dasari, Abhishek Sharma, Todd A. Byers, Gary A. Glass, Srinivasan Srivilliputhur, Bibhudutta Rout, Rajarshi Banerjee
Summary: The study combines the beneficial effects of a concentrated multi-component solid solution and chemical ordering on the parent lattice of a candidate alloy, Al0.3CoFeNi, to enhance proton radiation resistance. The irradiation of these microstructures with high-fluence MeV-energetic protons aids the transformation of the prior metastable single FCC solid-solution with SRO domains toward a more stable condition with L1(2) long-range ordered (LRO) domains embedded within the FCC solid solution matrix. Thermal activation via annealing at 500 degrees C for 30 min induces a similar transformation from SRO to LRO in this alloy, driving the system closer to equilibrium.
APPLIED PHYSICS LETTERS
(2021)
Article
Astronomy & Astrophysics
Joshua M. Young, Todd A. Byers, Eric J. Lang, Satyabrata Singh, Gary A. Glass, Khalid Hattar, Bibhudutta Rout
Summary: This study presents a synthesis process for experimentally simulating modifications in cosmic dust grains using sequential ion implantations or irradiations followed by thermal annealing. The redistribution of Fe, Mg, and O elements in the analogues after thermal annealing was observed, with incorporation into crystal structures forming nanocrystalline Mg and Fe oxides. The experimental results showed the dynamic behavior of implanted atoms and the formation of various phases in crystalline minerals in the annealed analogues.
PLANETARY AND SPACE SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Mohammad Jashim Uddin, Hector R. Siller, Reza A. Mirshams, Todd A. Byers, Bibhudutta Rout
Summary: This study experimentally investigated the effects of 1 MeV proton irradiation on micro-mechanical properties, microstructure, and strain-rate sensitivity of 17-4 PH stainless steel. The results showed that the micro-mechanical properties and maximum shear strength of irradiated stainless steel parts were significantly affected at strain rates higher than 0.25 s(-1). Additionally, the grain size of the irradiated parts was observed to become slightly smaller.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Ahmad R. Kirmani, Brandon K. Durant, Jonathan Grandidier, Nancy M. Haegel, Michael D. Kelzenberg, Yao M. Lao, Michael D. McGehee, Lyndsey McMillon-Brown, David P. Ostrowski, Timothy J. Peshek, Bibhudutta Rout, Ian R. Sellers, Mark Steger, Don Walker, David M. Wilt, Kaitlyn T. VanSant, Joseph M. Luther
Summary: Perovskite photovoltaics have great potential in terrestrial and space energy production, but their radiation tolerance needs to be analyzed. This article presents guidelines for rigorously testing the radiation tolerance of perovskite photovoltaics.
Article
Energy & Fuels
Ahmad R. Kirmani, David P. Ostrowski, Kaitlyn T. VanSant, Todd A. Byers, Rosemary C. Bramante, Karen N. Heinselman, Jinhui Tong, Bart Stevens, William Nemeth, Kai Zhu, Ian R. Sellers, Bibhudutta Rout, Joseph M. Luther
Summary: Researchers have discovered a silicon oxide that can protect perovskite photovoltaics from damage caused by protons, alpha particles, and atomic oxygen, improving their reliability for space applications.
Article
Chemistry, Physical
Hadi Afshari, Shashi Sourabh, Sergio A. Chacon, Vincent R. Whiteside, Rachel C. Penner, Bibhudutta Rout, Ahmad R. Kirmani, Joseph M. Luther, Giles E. Eperon, Ian R. Sellers
Summary: Formamidinium cesium (FACs) perovskites solar cells have high thermal stability, as demonstrated through high-temperature data showing operation at temperatures exceeding 200 degrees C. Device measurements between 250 K and 490 K indicate reversible halide segregation as the cause of performance loss at higher temperatures, with no evidence of a structural phase transition. The power conversion efficiency is retained when the temperature is reduced back to ambient.
ACS ENERGY LETTERS
(2023)
Proceedings Paper
Computer Science, Artificial Intelligence
Venkata K. V. V. Bathalapalli, Saraju P. Mohanty, Elias Kougianos, Vasanth Iyer, Bibhudutta Rout
Summary: This work presents a sustainable cybersecurity solution using Physical Unclonable Functions (PUF), Trusted Platform Module (TPM), and Tangle Distributed Ledger Technology (DLT) for secure device and data storage in IoT systems. The proposed architecture combines PUF and TPM to protect the PUF key by sealing it in the TPM. Each IoT node is assigned a specific NV-index for sealing the PUF key to TPM using the MAC address. The architecture also utilizes Tangle and a Masked Authentication Messaging (MAM) scheme for efficient and secure access control to Tangle in decentralized IoT systems.
PROCEEDINGS OF THE GREAT LAKES SYMPOSIUM ON VLSI 2023, GLSVLSI 2023
(2023)
Proceedings Paper
Computer Science, Artificial Intelligence
Venkata P. Yanambaka, Saraju P. Mohanty, Elias Kougianos, Babu K. Baniya, Bibhudutta Rout
Summary: This paper introduces a new controlled Physical Unclonable Function (PUF) called Veda-PUF, which uses algorithm for processing input and output to enhance key security and integrity. The uniqueness and reliability of generated keys are close to ideal values, allowing for an increased number of PUF keys for various applications.
2021 IEEE INTERNATIONAL SYMPOSIUM ON SMART ELECTRONIC SYSTEMS (ISES 2021)
(2021)
Proceedings Paper
Energy & Fuels
Brandon K. Durant, Hadi Afshari, Shashi Sourabh, Vishal Yeddu, Matthew T. Bamidele, Satyabrata Singh, Bibhudutta Rout, Giles E. Eperon, Do Young Kim, Ian R. Sellers
Summary: Two different single junction mixed organic-inorganic halide perovskite solar cells were found to have good tolerance to high energy proton radiation, showing stability and performance retention. The tolerance of these materials is promising for the development of multijunction tandem flexible photovoltaic devices.
2021 IEEE 48TH PHOTOVOLTAIC SPECIALISTS CONFERENCE (PVSC)
(2021)
Article
Instruments & Instrumentation
Taisei Hayashi, Kensei Ichiba, Daisuke Nakauchi, Takumi Kato, Noriaki Kawaguchi, Takayuki Yanagida
Summary: In this study, Cr-doped Mg4Ta2O9 single crystals with different doping levels were synthesized using the floating zone method, and their photoluminescence and scintillation properties were evaluated. The results showed that Cr-doped Mg4Ta2O9 single crystals exhibited broad emission bands in the near-infrared region and showed scintillation characteristics within specific wavelength ranges. Additionally, the samples with different Cr doping levels demonstrated different lower detection limits based on the dose rate response function.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2024)
Article
Instruments & Instrumentation
S. Marouf, A. C. Chami, Y. Boudouma
Summary: This study develops a Monte Carlo simulation approach to describe proton-induced secondary electron emission in solids. Theoretical modeling based on the Mott's elastic scattering cross-section and Lindhard's dielectric function was used to calculate the double differential cross-section (DDCS) of excited electrons and describe electron transport in the medium. The results for aluminum show the angular and energy distributions of backscattered electrons for incident protons with energy below 25 keV at normal incidence, and the total electron emission yield also agrees well with available measurements.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2024)
Article
Instruments & Instrumentation
Weipeng Yan, Baojun Duan, Zijian Zhu, Yan Song, Guzhou Song, Jiming Ma, Binkang Li, Yucheng Liu
Summary: This article reports on the scintillation performance of Lithium-doped 2D (PEA)2PbBr4 perovskite single crystals synthesized at room temperature. The crystals exhibit fast decay time, high light yield, and high spatial resolution, making them highly promising for medical diagnostic applications.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2024)
Article
Instruments & Instrumentation
S. B. Vishwakarma, S. K. Dubey, R. L. Dubey, I. Sulania, D. Kanjilal
Summary: Investigations have been conducted on the implanted SiO2 thin film after thermal annealing using various analytical techniques. The results revealed the absence of vacancy defects, variations in vibrational modes and the formation of new structures. The photoluminescence intensity of the annealed SiO2 samples was higher, with a decrease in non-radiative defect centers and an increase in radiative Si:SiO2 interface states. Additionally, the presence of silicon nanoclusters formed after annealing resulted in an additional radiative recombination peak. Furthermore, the formation of new SiOx structures was observed after thermal annealing.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2024)
Article
Instruments & Instrumentation
M. Koshimizu, S. Kurashima, A. Kimura, M. Taguchi
Summary: By observing the scintillation time profiles of CeF3 under irradiations of pulsed beams with different LETs, we found that the initial decay was faster for higher LET, which is consistent with previous studies on other self-activated scintillators. This faster decay at higher LET can be explained by the competition between the scintillation caused by 5d-4f transition of Ce3+ ions and quenching due to the interaction between excited Ce3+ ions close to each other.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2024)
Article
Instruments & Instrumentation
Junjie Shi, Jianhong Hao, Fang Zhang, Qiang Zhao, Bixi Xue, Jieqing Fan, Zhiwei Dong
Summary: This study examined the neutralization process and beam quality of a hydrogen beam by emitting negative hydrogen ions to a hydrogen target. The findings showed that the neutralization efficiency was influenced by variables such as the transport distance, energy, and target gas density. However, the maximal neutralization efficiency was not affected by the density of the target gas or the energy of the negative hydrogen ions.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2024)
