Article
Materials Science, Multidisciplinary
Tucker L. Murrey, Justin T. Mulvey, Meghna Jha, Alice S. Fergerson, Daniel Vong, Andreas Soika, Jakob Lorek, Sarah E. Dolan, Daniel R. Tiffany-Appleton, Adam J. Moule
Summary: A novel method called Projection Photothermal Lithography (PPL) is introduced for patterning semiconducting polymers. Experimental results demonstrate that rapid and large area sub-micron patterns can be obtained using this method.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Chemistry, Multidisciplinary
Meng Zhang, Youdi Hu, Shuaiqi Wang, Yaru Li, Chunwu Wang, Ke Meng, Gang Chen
Summary: A new device architecture for self-driven photodetectors with tunable asymmetric Schottky junctions based on a nanomesh electrode is reported. The optimized device demonstrates high detectivity and a large on/off ratio, showing promise for various applications requiring self-driven photodetectors. The nanomesh electrode can also be used to investigate the optoelectronic properties of different semiconducting materials.
Article
Crystallography
Xiaodan Zhao, Xiao Deng, Mengyang Li, Yingmin Wang, Kaili Mao, Yibiao Yang, Mingda Zhang
Summary: This study proposes a method for growing epitaxial graphene on SiC in a low vacuum environment, overcoming the issues of traditional epitaxial growth methods. The method was found to produce large areas of graphene coverage on the SiC C-face.
JOURNAL OF CRYSTAL GROWTH
(2021)
Article
Chemistry, Multidisciplinary
Elena Navarro, Maria Ujue Gonzalez, Fanny Beron, Felipe Tejo, Juan Escrig, Jose Miguel Garcia-Martin
Summary: This study focuses on the growth of ferromagnetic films composed by polycrystalline Fe and Fe2O3 nanopillars using magnetron sputtering with glancing angle deposition. The morphological features and magnetic properties of these films can be controlled by the growth conditions, such as substrate rotation and collimator mask. The results demonstrate the potential of this method for fabricating large area nanostructured films with tailored structural and magnetic properties.
Article
Multidisciplinary Sciences
Woo Young Kim, Bo Wook Seo, Sang Hoon Lee, Tae Gyung Lee, Sin Kwon, Won Seok Chang, Sang-Hoon Nam, Nicholas X. Fang, Seok Kim, Young Tae Cho
Summary: A challenge in making a flexible mold stamp using roll-to-roll nanoimprint lithography is to increase area while minimizing perceptible seams. A method that enables the fabrication of scalable, quasi-seamless functional surfaces without the use of alignment marks is proposed. This method is capable of fabricating scalable functional surfaces and imprint molds with quasi-seamless and alignment mark-free patterning.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Coatings & Films
Mai Ugajin, Soyoung Park, Takayuki Kiba, Junichi Takayama, Satoshi Hiura, Akihiro Murayama, Midori Kawamura, Yoshio Abe
Summary: In this study, Ag nanomesh structures with different sizes and periods of hole arrays were fabricated and investigated for their potential applications in optical devices such as OLEDs. The results showed that the deposition of Alq(3) on Ag nanomesh can enhance its photoluminescence intensity, indicating the feasibility of using Ag nanomeshes as plasmonic electrodes.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Feng Xu, Zhiliang Zhang, Jun Ma, Churong Ma, Bai-Ou Guan, Kai Chen
Summary: Reliable gas sensors are crucial for hydrogen gas detection and storage. In this study, large-area Pd nanostructures were fabricated, and their H-2 sensing performance was systematically studied. The results showed clear transmittance changes in the visible-near infrared range for both Pd nanoholes and nanotriangles after hydrogen absorption.
Article
Chemistry, Multidisciplinary
Dongxu Zhang, Zhiqian Jia, Shengping Zhang, Dandan Hou, Jianjun Wang, Ye Liu, Xiao Han, Bart van der Bruggen, Luda Wang
Summary: Inspired by the composite structure of cell membranes and cell walls, a fiber-reinforced large-area atomically thin nanoporous graphene membrane with enhanced mechanical strength and stability is designed, exhibiting superior gas permeance and low water vapor transportation rate.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Multidisciplinary Sciences
Meihui Wang, Ming Huang, Da Luo, Yunqing Li, Myeonggi Choe, Won Kyung Seong, Minhyeok Kim, Sunghwan Jin, Mengran Wang, Shahana Chatterjee, Youngwoo Kwon, Zonghoon Lee, Rodney S. Ruoff
Summary: Restricting the initial growth temperatures used for chemical vapour deposition of graphene on metal foils produces optimum conditions for growing large areas of fold-free, single-crystal graphene, which exhibit highly uniform transport properties.
Article
Nanoscience & Nanotechnology
Gergely Dobrik, Peter Nemes-Incze, Bruno Majerus, Peter Sule, Peter Vancso, Gabor Piszter, Miklos Menyhard, Benjamin Kalas, Peter Petrik, Luc Henrard, Levente Tapaszto
Summary: Quantum confinement of charge carriers in graphene can effectively adjust its properties, and a new technique has been developed to confine charge carriers without inducing inter-valley scattering. This technique increases the resonance frequency of graphene plasmons and enhances light-matter interactions, enabling visible plasmons in graphene.
NATURE NANOTECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Jianbin Mao, Qui Thanh Hoai Ta, Nguyen Ngoc Tri, Lanyan Shou, Soonmin Seo, Weiming Xu
Summary: A MoTe2 nanomesh material with large specific area, few-layer structure, and uniform pores was synthesized using the nanocasting stratagem. The material exhibited excellent electrocatalytic and hydrogen evolution reaction performances. The stable configuration and possible reaction pathways were optimized using density functional theory calculations. This research provides new insights for improving the catalytic performance of 2D TMD catalysts in electrochemical reactions.
APPLIED MATERIALS TODAY
(2023)
Review
Chemistry, Multidisciplinary
Meihui Wang, Da Luo, Bin Wang, Rodney S. Ruoff
Summary: Breakthroughs have been made in the mass production of graphene using CVD, with recent progress in growing large-area single crystal graphene. Challenges remain in achieving uniform bilayer or multilayer graphene single crystals over a large area, but the layer-by-layer transfer method shows promise for creating new types of crystals with specific layer numbers and stacking angles.
TRENDS IN CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Ari Paavo Seitsonen, Thomas Greber
Summary: The study investigates the growth of graphene and hexagonal boron nitride on hot transition metal surfaces. It demonstrates that h-BN can be distilled on rhodium metal surfaces to obtain higher quality h-BN. By calculating the adsorption energies, diffusion activation energies, and stability of different structures, the study predicts the performance of different substrates in chemical vapor deposition processes for the growth of graphene and h-BN. Furthermore, vacancy creation energies were calculated to assess the stability of graphene and h-BN on metallic substrates.
NANOSCALE ADVANCES
(2023)
Article
Optics
Zhuofei Gan, Hongtao Feng, Liyang Chen, Siyi Min, Chuwei Liang, Menghong Xu, Zijie Jiang, Zhao Sun, Chuying Sun, Dehu Cui, Wen-Di Li
Summary: This work presents a lithographic approach combining interference lithography (IL) and grayscale-patterned secondary exposure (SE) for wafer-scale arbitrary modulation of feature size distribution. By utilizing high-throughput IL and grayscale-patterned SE, uniform nanopatterns with <5% linewidth variation and wafer-scale structural color painting with gradient grayscale color were successfully achieved.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Chemistry, Analytical
Yuan Zhai, Yi Xiang, Weiqing Yuan, Gang Chen, Jinliang Shi, Gaofeng Liang, Zhongquan Wen, Ying Wu
Summary: This study focuses on the high sensitivity detection of terahertz waves using a graphene nanomesh as grating, and the development of a THz detector with improved sensitivity and performance through the fabrication process and optimization of graphene nanostructures.
Article
Chemistry, Analytical
Ensie Hosseini, Jahan B. Ghasemi, Maryam Shekarchi
Summary: The study developed an analytical method for the simultaneous detection and quantitative determination of three key adulterants in dietary food supplements. The proposed method benefits from optimization and calibration, yielding reliable results.
JOURNAL OF AOAC INTERNATIONAL
(2022)
Article
Automation & Control Systems
Shokoofeh Khani, Fatemeh Mohajer, Ghodsi Mohammadi Ziarani, Alireza Badiei, Jahan B. Ghasemi
Summary: A novel and biocompatible colorimetric method was developed for the detection and speciation of Fe3+ and Fe2+ ions. The method relies on the complex formation of these ions with organic compounds in pomegranate peel extract, and can accurately determine their concentrations in real matrix samples using a multivariate model based on absorption spectra. The detection limits for Fe3+ and Fe2+ were found to be 0.53 and 0.14 μg ml(-1), respectively.
JOURNAL OF CHEMOMETRICS
(2023)
Article
Materials Science, Multidisciplinary
Mitra Mousavi, Sahar Moradian, Pouran Pourhakkak, Gaoke Zhang, Mohammad Mehdi Habibi, Meisam Madadi, Jahan B. Ghasemi
Summary: In this research, novel g-C3N4-nanosheet/ZnMoO4 heterostructures were synthesized, which exhibited significant photocatalytic ability under visible-light irradiation, with 3.77 times and 4.89 times faster Cr(VI) reduction rate compared to g-C3N4-nanosheet and ZnMoO4, respectively, and produced a large amount of ammonium. This improved ability was attributed to increased visible-light absorption and low charge recombination rate.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Faezeh Farzin, Mohammad Kazem Rofouei, Mitra Mousavi, Jahan B. Ghasemi
Summary: This paper reports a green method for hydrogen peroxide production and organic pollutants removal using a two-dimensional nanocomposite. The results show that the prepared binary nanocomposite exhibits a high H2O2 production rate and degradation efficiency, and the Z-scheme-based charge-transfer dynamics effectively improve the photocatalytic performance.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Chemistry, Physical
Mitra Mousavi, Mohammad Mehdi Habibi, Gaoke Zhang, Pouran Pourhakkak, Sahar B. Moradian, Jahan B. Ghasemi
Summary: In this study, an n-n heterojunction of ZnO/Sb2MoO6 was developed by a facile procedure and its photocatalytic ability for the N-2 fixation process was explored. The physicochemical analyses of ZnO and Sb2MoO6 in the pure samples and the junction material were conducted to understand their structural, chemical, optical, morphological, and textural features. The optimal performance was achieved with ZnO/Sb2MoO6 (20%) nanocomposite, which showed significantly higher ammonium generation compared to pure ZnO and Sb2MoO6. The research provides insights into achieving superior conversion efficiency in N-2 fixation reactions by utilizing the ZnO/Sb2MoO6 heterojunction.
SURFACES AND INTERFACES
(2022)
Article
Engineering, Chemical
Azin Khamesan, Mohammad Mehdi Esfahani, Jahan B. Ghasemi, Faezeh Farzin, Anita Parsaei-Khomami, Mitra Mousavi
Summary: This study explores the constructional modification of Graphitic carbon nitride nanosheet (GCN-ns) with ZnCr layered double hydroxide (ZC-LDH) to enhance its visible light absorption. The incorporation of ZC-LDH onto the surface of GCN-ns improves its photocatalytic abilities, leading to effective degradation of Rhodamine B under UV/vis light irradiation. The self-production of H2O2 on the GCN-ns/ZC-LDH surface accounts for additional hydroxide radical generation, contributing to the improved performance.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Environmental Sciences
Htet Htet Naing, Yuan Li, Jahan B. Ghasemi, Junting Wang, Gaoke Zhang
Summary: In this study, montmorillonite loaded BiOCl nanosheets with in situ reduced bismuth were successfully synthesized via a one-step hydrothermal method. The modified photocatalyst showed improved visible light response and broadened light absorption range due to the semi metallic bismuth nanoparticles, leading to enhanced photocatalytic performance for pollutant degradation.
Article
Chemistry, Inorganic & Nuclear
Anita Parsaei-Khomami, Mitra Mousavi, Mohammad Mehdi Habibi, Kamal Shirzad, Jahan B. Ghasemi, Linxi Wang, Jiaguo Yu, Huogen Yu, Xuanhua Li
Summary: Nanocomposites with outstanding visible light photoelectrochemical characteristics have been synthesized. Ternary chalcogenides (TC) are excellent components in forming nanocomposites with classic semiconductors like TiO2 due to their narrow bandgaps and efficient visible light absorption. TiO2/AgBiS2 binary nanocomposite was successfully synthesized and deposited on FTO via EPD technique in this study. The nanocomposite showed enhanced visible light absorption and reduced bandgaps, confirmed by XRD, FESEM, mapping, and UV-DRS results. Electrochemical characterization and photocatalytic degradation experiments demonstrated its excellent performance in PEC application.
SOLID STATE SCIENCES
(2022)
Article
Nanoscience & Nanotechnology
A. M. Arquitola, H. Jung, S. Lee, T. J. Ronningen, S. Krishna
Summary: This study investigates the minority carrier lifetime of InAsSb nBn structures under three conditions: As-Grown, Barrier-Etched, and Passivated blanket barrier-etched, using transient microwave reflectance. Qualitative comparison shows that the minority carrier lifetime decreases for the Barrier-Etched sample compared to the As-Grown sample, indicating sensitivity to changes in the sample surface. Quantitative comparison using a polynomial fit reveals the specific values of parameters A, B, and C for each sample.
Article
Optics
S. Lee, X. Jin, H. Jung, H. Lewis, Y. Liu, B. Guo, S. H. Kodati, M. Schwartz, C. Grein, T. J. Ronningen, J. P. R. David, Joe C. Campbell, S. Krishna
Summary: In this study, a room temperature linear mode APD with high gain, low excess noise factor, and high quantum efficiency at 1550 nm wavelength was demonstrated. The APD on an InP substrate with a GaAs0.5Sb0.5/Al0.85Ga0.15As0.56Sb0.44 heterostructure showed significant improvements compared to commercial InGaAs/InP APDs.
Article
Physics, Applied
H. Jung, S. Lee, Y. Liu, X. Jin, J. P. R. David, S. Krishna
Summary: SACM APDs based on GaAs0.5Sb0.5/Al0.85Ga0.15As0.56Sb0.44 structure with a GaAsSb absorber instead of traditional InGaAs absorber require further optimization in reducing tunneling and impact ionization noise in the high electric field region. The tunneling phenomenon is analyzed through current density-voltage measurements, and the impact ionization behavior is evaluated by measuring the multiplication of p-i-n GaAsSb PDs. The findings suggest that the electric field in the absorber can be increased to 175 kV/cm without detrimental ionization effects when designing a SACM APD with a GaAsSb absorber.
APPLIED PHYSICS LETTERS
(2023)
Review
Food Science & Technology
Fatemeh Barzegar, Samaneh Nabizadeh, Marzieh Kamankesh, Jahan B. Ghasemi, Abdorreza Mohammadi
Summary: The increase in chronic diseases worldwide is a cause for concern, largely due to synthetic additives in processed foods. These additives pose health risks and there is a demand for environmentally friendly, natural-based food additives that promote overall health. Nanoemulsion technology can enhance the solubility, stability, and bioavailability of these natural-based additives, making them potential next-generation food additives. This study provides an overview of the production and effects of natural-based food additives using nanotechnology approaches.
FOOD AND BIOPROCESS TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Mitra Mousavi, Alireza Bonakdar, Anita Parsaei-Khomami, Jahan B. Ghasemi, Pouran Pourhakkak, Mohammad Mehdi Habibi, Mohammad Jafari, Amir H. Jalili, Xuanhua Li
Summary: The design of photocatalysts utilizing sunlight to generate ammonia and remove organic pollutants is important for sustainable chemical industry. A g-C3N4 nanosheet/AgBiS2 nanocomposite with visible-light response was successfully fabricated for the first time. The composite exhibited excellent photocatalytic activity for RhB degradation and N2 fixation, with significant improvements compared to g-C3N4 nanosheet and AgBiS2 alone. The improved activity was attributed to the suitable heterojunction formation, suppressing charge recombination and facilitating transfer.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Physics, Applied
Bhupesh Bhardwaj, Urvashi Bothra, Shivam Singh, Sophie Mills, T. J. Ronningen, Sanjay Krishna, Dinesh Kabra
Summary: The study explores the effects of active layer thickness and different interfacial layers on the suppression of leakage current in photodetectors. High-sensitivity perovskite photodetectors with a broadband response and low noise current are fabricated using a specific device structure. Optimal thickness of the active layer and use of a specific electron transport layer further enhance the overall performance of the photodetectors. Comparison with published reports demonstrates the advancements achieved in this study.
APPLIED PHYSICS REVIEWS
(2023)
Article
Chemistry, Physical
Mozhgan Gholamveysi, Marzieh Ghodrati, Mitra Mousavi, Anita Parsaei-Khomami, Jahan B. Ghasemi, Mohammad Mehdi Habibi, Maryam Shekofteh-Gohari, Parviz Norouzi, Xuanhua Li
Summary: Photoelectrocatalysis is widely used in advanced oxidation processes due to its reduced recombination of charge carriers. This study proposes the formation of a heterojunction between ZnO and MoSe2 to enhance visible light absorption and PEC ability for organic contaminant removal. The as-synthesized nanocomposite was characterized and immobilized onto FTO for electrochemical characterization. The results showed higher PEC activity and recyclability compared to bare ZnO samples, and the operational parameters were investigated to understand their impact on the degradation process.
SURFACES AND INTERFACES
(2023)
