Article
Chemistry, Applied
Hao Yuan, Maojun Zheng, Pengjie Liu, Qiang Li, Fanggang Li, Dongkai Jiang, Yuxiu You, Wenlan Zhang, Li Ma, Wenzhong Shen
Summary: The fabrication of transferable three-dimensional GaP nanopore array film was first proposed and realized using an electrochemical exfoliated method. The nanopore size can be adjusted by changing etching conditions, and the film shows superior performance in Raman intensity and photoluminescence. Furthermore, the film provides possibilities for establishing different sandwich structure heterojunctions, opening up potential applications in functional devices.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Lei Zhang, Kai Gao, Zhou Zeng, Kai Wang, Chengxiang Zhao, Daohan Ge, Liqiang Zhang
Summary: This experiment studied the electrochemical etching of P-type monocrystal silicon in a mixed solution of hydrofluoric acid (HF) and dimethylformamide (DMF). By applying this method, high-aspect-ratio and high etching rate porous silicon was successfully obtained. Photolithographic treatment and further electrochemical etching led to the fabrication of high-aspect-ratio regular-array P-type porous silicon. This method is significant for the design of microelectromechanical systems (MEMS) that require high-aspect-ratio silicon structures.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jing Li, Bintong Huang, Yuanhao Wang, Aijia Li, Yong Wang, Yangyang Pan, Jia Chai, Ze Liu, Yueming Zhai
Summary: The single-molecule technique for investigating unlabeled proteins in solution is challenging, but nanopore sensing offers a label-free tool for collecting structural information. This study developed a reliable method to convert a silicon nitride nanopore into a stable nanonet platform for single-entity sensing. The nanonet provides more structural information and captures the UV-light-induced structural-change process of individual proteins.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Zehui Xia, Andre Scott, Rachael Keneipp, Joshua Chen, David J. Niedzwiecki, Brian DiPaolo, Marija Drndic
Summary: We have demonstrated the translocations of DNA through silicon nitride pores formed by simple chemical etching. The characterization of these nanopores was confirmed through DNA translocations and TEM imaging. Our study provides comprehensive information about the pore area, number, and structure using multiple methods, including ionic conductance and electron energy loss spectroscopy. This affordable chemical method for making solid-state nanopores shows great potential in DNA sensing and characterization applications.
Article
Engineering, Manufacturing
Yun Chen, Yanhui Chen, Junyu Long, Dachuang Shi, Xin Chen, Maoxiang Hou, Jian Gao, Huilong Liu, Yunbo He, Bi Fan, Ching-Ping Wong, Ni Zhao
Summary: A method combining metal-assisted chemical etching and machine learning was proposed to fabricate sub-10 nm nanopore arrays on silicon wafers. Through modeling the relationship between nanopore structures and fabrication conditions using a SVM algorithm, a processing parameter window for generating regular nanopore arrays on silicon wafers with variable doping types and concentrations was obtained. This machine-learning-assisted etching method provides a feasible and economical way for processing high-quality silicon nanopores, nanostructures, and devices.
INTERNATIONAL JOURNAL OF EXTREME MANUFACTURING
(2021)
Article
Materials Science, Multidisciplinary
Fedor Ptashchenko
Summary: This study investigates the reactions that can occur on hydrogenated silicon surfaces in aqueous solutions of HF under the influence of both negative and positive ionic complexes using quantum-chemical calculations. It was revealed that the H -> F substitution reaction has a high energy barrier, making classical electrochemical dissolution of silicon unlikely. Additionally, it was found that barrier-free reactions of direct fluorination can occur on certain silicon faces, shedding light on the mechanism of silicon etching and the factors affecting the rate of electrochemical etching of silicon.
COMPUTATIONAL MATERIALS SCIENCE
(2021)
Article
Electrochemistry
Jia-Chuan Lin, Yi-Cheng Liu, Shan-Heng Lu, Hsu-Nan Yen, Kalpana Settu
Summary: A high specific capacitance porous silicon-based capacitive structure was fabricated using three-dimensional electrochemical etching. Nano-scale graphene was embedded into the surface pores of the porous silicon to improve contact. The increase in specific capacitance due to laser trenches was positively correlated with the extent of lateral etching.
ELECTROCHEMISTRY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Nadzeya Khinevich, Mindaugas Juodenas, Asta Tamuleviciene, Hanna Bandarenka, Sigitas Tamulevicius
Summary: The study focused on the morphology and optical properties of porous silicon, with an emphasis on increasing pore density by removing bottleneck structures and its potential use as a template for nanoparticle arrays.
Article
Materials Science, Multidisciplinary
Ayah A. Hafez, Magdy M. Mohammed, I. H. Ibrahim, G. M. Youssef
Summary: A porous silicon non-enzymatic sensor (Ag/Ps/Si/Ag) was prepared using galvanostatic electrochemical etching, with optical measurements and morphological analysis revealing its suitability for detecting glucose concentrations.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Haibin Li, Shinya Kato, Tetsuo Soga
Summary: Through comparing different concentration silicon, it was found that high-doped silicon has the highest etching rate, contrary to existing reports. In addition, severe lateral etching of high-doped silicon was observed. Therefore, it is necessary to re-understand the etching characteristics and mechanism of high-doped silicon.
MATERIALS RESEARCH EXPRESS
(2022)
Article
Chemistry, Analytical
Nguyen Xuan Chung, Hithesh Kumar Gatty, Xi Lu, Miao Zhang, Jan Linnros
Summary: Dielectric breakdown etching is a common method for creating nanopores, but high-aspect-ratio nanopores can slow down the translocation of biomolecules. By optimizing the process parameters, it is possible to mass-produce single and array nanopores on a silicon device layer, with diameters around 12nm, suitable for single-molecule sensing applications.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Physical
Hong Zhang, Feng Li, Shidong Wang, Lisheng Zhong
Summary: The study found that an appropriate thickness of oxide layer on the silicon surface promotes uniform growth of pyramidal nuclei in monocrystalline silicon solar cells, leading to a more even distribution of pyramid sizes and reduced surface reflectivity.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Swarnadeep Seth, Aniket Bhattacharya
Summary: The study introduces an accurate method to determine DNA barcodes using protein tags and a theoretical scheme that significantly improves accuracy. The analysis of speed variation along the DNA backbone due to heavier protein tags is explained by non-equilibrium tension propagation theory. The research suggests that physically motivated interpolation scheme can accurately determine barcode velocities.
Article
Electrochemistry
Rajendra Kumar Arya, Shivangi Paliwal, Akshay Dvivedi, Rajakumaran Maran
Summary: Electrolyte injection-electrochemical discharge machining (EI-ECDM) is a method used to fabricate components by subtracting unwanted material through electrochemical action. The deposition of machined by-products on the tool-electrode significantly affects the geometry, surface texture, and properties, which in turn impact the performance of the ECDM process. Controlled deposition can improve the performance of EI-ECDM.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Aliaksandr Sharstniou, Stanislau Niauzorau, Anna L. Hardison, Matthew Puckett, Neil Krueger, Judson D. Ryckman, Bruno Azeredo
Summary: Metal-assisted electrochemical nanoimprinting (Mac-Imprint) is a technology that allows the fabrication of micro- and nanoscale 3D freeform structures on silicon. However, the current challenge is the roughness issue during the imprinting process, which leads to light scattering. In this study, the roughness is reduced to sub-10 nm levels by changing the pore size of the catalyst, and single-mode rib-waveguides with good depth uniformity and limited defect formation on silicon-on-insulator wafers are successfully produced.
ADVANCED MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Archana Samanta, Hui Chen, Pratick Samanta, Sergei Popov, Ilya Sychugov, Lars A. Berglund
Summary: Transparent wood-based composites with dual-stimuli-responsive chromic components showed reversible control of optical properties in response to temperature and UV radiation. The chromic components, located inside the wood structure, demonstrated durable reversible optical properties. This research contributes to the development of smart photoresponsive windows with energy storage capabilities.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Biophysics
Siddharth Sourabh Sahu, Christiane Stiller, Elizabeth Paz Gomero, Abel Nagy, Amelie Eriksson Karlstrom, Jan Linnros, Apurba Dev
Summary: An electrical immuno-sandwich assay utilizing an electrokinetic-based streaming current method is proposed, demonstrating improved target selectivity and linear concentration dependent response. The study explores the role of electric charge in detection sensitivity and the potential for further improvement, showcasing a clear enhancement of detection signal with increasing DNA lengths conjugated to the detection probe.
BIOSENSORS & BIOELECTRONICS
(2021)
Article
Chemistry, Analytical
Nguyen Xuan Chung, Hithesh Kumar Gatty, Xi Lu, Miao Zhang, Jan Linnros
Summary: Dielectric breakdown etching is a common method for creating nanopores, but high-aspect-ratio nanopores can slow down the translocation of biomolecules. By optimizing the process parameters, it is possible to mass-produce single and array nanopores on a silicon device layer, with diameters around 12nm, suitable for single-molecule sensing applications.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Multidisciplinary
Sara Cavallaro, Federico Pevere, Fredrik Stridfeldt, Andre Gorgens, Carolina Paba, Siddharth S. Sahu, Doste R. Mamand, Dhanu Gupta, Samir El Andaloussi, Jan Linnros, Apurba Dev
Summary: This study for the first time simultaneously investigated multiple parameters on small extracellular vesicles (sEVs) to identify both common and cell line-specific subpopulations, providing insights into their biology and functions.
Article
Chemistry, Physical
Jingjian Zhou, Jing Huang, Huai Chen, Archana Samanta, Jan Linnros, Zhenyu Yang, Ilya Sychugov
Summary: The study presents a cost-effective method for synthesizing Si quantum dots with superior optical properties compared to those from other precursors, which could be beneficial for applications like photovoltaics.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Vladimir Ciobanu, Giacomo Ceccone, Irina Jin, Tudor Braniste, Fei Ye, Francesco Fumagalli, Pascal Colpo, Joydeep Dutta, Jan Linnros, Ion Tiginyanu
Summary: This work demonstrates the fabrication of nanoperforated ultrathin beta-Ga2O3 membranes through Surface Charge Lithography (SCL) approach, where GaN membranes are transformed into beta-Ga2O3 through thermal treatment. The morphology evolution and oxidation mechanism of the membranes were studied using XPS, AFM, Raman, and TEM analyses under different annealing conditions.
Article
Green & Sustainable Science & Technology
Archana Samanta, Martin Hoglund, Pratick Samanta, Sergei Popov, Ilya Sychugov, Lorenza Maddalena, Federico Carosio, Lars A. Berglund
Summary: This study investigates the preparation of wood substrates modified by charged inorganic nanoparticles for generating functional properties and addressing the flammability problem of wood biocomposites. The influence of charge on the distribution of nanoparticles in wood is explored, and it is hypothesized that charge control diffusion can improve dispersion, infiltration, and stability of nanoparticles in wood structure while limiting agglomeration and distribution.
ADVANCED SUSTAINABLE SYSTEMS
(2022)
Article
Materials Science, Multidisciplinary
Hui Chen, Celine Montanari, Ravi Shanker, Saulius Marcinkevicius, Lars A. Berglund, Ilya Sychugov
Summary: Transparent wood (TW), as an emerging biocomposite, combines optical functionality with structural properties of wood. However, the complex optical response of hierarchical materials hinders their direct study and control, making a detailed understanding of light-material interaction mechanisms necessary for achieving optically clear wood.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Jing Huang, Jingjian Zhou, Erik Jungstedt, Archana Samanta, Jan Linnros, Lars A. Berglund, Ilya Sychugov
Summary: A concept of transparent quantum dot glass (TQDG) is proposed for building-integrated photovoltaics (BIPVs). TQDGs, serving as both power-generating components and building construction materials, demonstrate favorable photovoltaic, aesthetic, and building envelope characteristics. They also have better thermal and sound insulation properties compared to normal float glass, as well as improved mechanical performance and safety.
Article
Chemistry, Multidisciplinary
Huai Chen, Jiang Xu, Yaping Wang, Da Wang, Raquel Ferrer-Espada, Yutong Wang, Jingjian Zhou, Adrian Pedrazo-Tardajos, Mei Yang, Jia-Heng Tan, Xiaoyu Yang, Lei Zhang, Ilya Sychugov, Shoudeng Chen, Sara Bals, Johan Paulsson, Zhenyu Yang
Summary: Fluorescent probes are essential for cell imaging. This study presents a novel method using silicon nanocrystals as probes, which can switch their emission color from red to blue upon contact with amino acids in live cells. These probes disperse only in the cytoplasm and their fluorescence intensity correlates linearly with amino acid concentration, making them promising tools for visualizing and quantifying amino acid-related processes in live cells.
Article
Optics
Jingjian Zhou, Jing Huang, Ilya Sychugov
Summary: This Letter presents a novel approach to estimate the power conversion efficiency (PCE) of a square luminescent solar concentrator (LSC) using point excitations on the optical centers. Experimental verification demonstrates the feasibility of this method, which provides a convenient way to estimate the photovoltaic performance of large-area LSC devices.
Article
Chemistry, Physical
Yupeng Yang, Apurba Dev, Ilya Sychugov, Carl Hagglund, Shi-Li Zhang
Summary: A systematic simulation-assisted optimization method for plasmon-enhanced fluorescence of single quantum dots based on nanohole arrays has been reported. By calibrating the simulation with experimental data and optimizing the nanohole diameter and depth, a 5-fold enhancement in photoluminescence of single quantum dots immobilized in nanoholes has been achieved compared to those on a bare glass substrate. This method holds promise for single-fluorophore-based biosensing.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Optics
Xi Lu, Jingjian Zhou, Madhuri Jash, Ilya Sychugov
Summary: This Letter presents an analytical approach to estimate the waveguiding efficiency of large-area luminescent solar concentrators (LSCs) and verifies the theory through the fabrication of a silicon quantum dot-based LSC. The model provides a physically relevant description of the optical and geometrical parameters of rectangular LSCs, serving as a straightforward analysis tool for large-area LSCs.