Article
Energy & Fuels
Ashish Prajapati, Jordi Llobet, Patricia C. Sousa, Helder Fonseca, Carlos Calaza, Gil Shalev
Summary: The study focuses on the utilization of deep subwavelength features to decrease broadband and omnidirectional reflection of the solar spectrum, achieving over 80% reflection decrement. Various surface silicon arrays incorporating features such as nanopillar arrays, quasinanolens, and deep subwavelength sidewall scalloping result in significant reductions in reflection, with additional exploration of possible light-trapping mechanisms numerically.
Article
Polymer Science
Jhih-Hao Ho, Tsung-Wei Shih, Chih-Ting Liu, Hung-Chieh He, Yu-Liang Lin, Lin-Ruei Lee, Kuan-Ting Lin, Yu-Hsuan Tseng, Teruki Sugiyama, Jiun-Tai Chen
Summary: A practical and versatile strategy has been proposed in this study to fabricate arrays of anisotropic polymer nanopillars via photo-fluidization, successfully preparing azopolymer nanopillar arrays whose deformation degrees are controlled by illumination times. Furthermore, patterned nanopillar arrays with designed photomasks have also been constructed.
MACROMOLECULAR RAPID COMMUNICATIONS
(2021)
Article
Nanoscience & Nanotechnology
Debasree Chowdhury, Shyamal Mondal, Maria Secchi, Maria Caterina Giordano, Lia Vanzetti, Mario Barozzi, Massimo Bersani, Damiano Giubertoni, Francesco Buatier de Mongeot
Summary: Highly porous Ge surfaces with uniformly distributed nanovoid structures were fabricated through ion implantation using a thin silicon nitride layer. By comparing with a flat reference, these nanoporous Ge films demonstrated strong and omnidirectional antireflection properties.
Article
Chemistry, Multidisciplinary
Chenghao Zhang, Zhichao Liu, Chun Li, Jian Cao, Josephus G. Buijnsters
Summary: In this study, ordered diamond nanopillar arrays were synthesized through a bottom-up approach using porous anodic aluminium oxide (AAO) templates. Commercial ultrathin AAO membranes were used as the growth template, and a three-step fabrication process involving chemical vapor deposition (CVD) was employed. After removing the AAO template, ordered arrays of submicron and nanoscale diamond pillars with diameters of around 325 nm and 85 nm, respectively, were successfully released.
Article
Engineering, Electrical & Electronic
Po-Min Chung, Ying-Ting Lin, Gou-Jen Wang
Summary: An Au/Ni nanopillar microarray electrode was developed for detecting red blood cell (RBC) concentrations. The electrode was fabricated using AAO as the template and had a diameter of 50 µm. The detection scheme showed two linear detection ranges and high recovery rates in whole blood sample tests, indicating its feasibility for RBC concentration detection in real blood samples.
IEEE SENSORS JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Louis Maduro, Marc Noordam, Maarten Bolhuis, Laurens Kuipers, Sonia Conesa-Boj
Summary: A novel strategy for fabricating position-controlled Mo/MoS2 core-shell nanopillars has been reported, utilizing metal-Mo nanoparticles as scaffolds for core/shell structure synthesis in a rich sulfur environment. The results demonstrate significant nonlinear optical processes in individual Mo/MoS2 nanoparticles, driven by the MoS2 shell, which could pave the way for a new generation of nanophotonic devices based on 1D TMD structures.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Makoto Higashino, Shunsuke Murai, Tien-Yang Lo, Shuhei Tomita, Katsuhisa Tanaka
Summary: In this study, periodic nanoparticle arrays composed of zirconia were successfully fabricated, which are transparent in the near-UV region. Compared with titanium dioxide, zirconia nanoparticle arrays can achieve larger photoluminescence enhancement.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Review
Biochemistry & Molecular Biology
Anna M. Brudzisz, Damian Gizinski, Wojciech J. Stepniowski
Summary: Anodic oxidation of metals leads to the formation of ordered nanoporous or nanotubular oxide layers, playing a significant role in various applications. However, there are still many fundamental aspects of anodizing that require deeper understanding. The inevitable phenomenon of anion incorporation during metal anodization and its impact on properties are discussed in detail in this review.
Article
Chemistry, Physical
Ashish Prajapati, Gil Shalev
Summary: This study demonstrates the excellent broadband absorption of the solar spectrum by utilizing arrays composed of light funnel arrays integrated with top nanolenses. The integration of nanolenses helps to reduce the reflection of light funnel arrays and achieve higher optical coupling efficiency. The numerical results show that the combination of light funnel arrays and nanolenses can increase the broadband absorption by about 12% under normal illumination. The enhancement in broadband absorption under oblique illumination is also confirmed. Photovoltaic cells based on this structure demonstrate an increase of approximately 10% in short-circuit current. The findings of this study are of great importance for improving the efficiency of solar energy harvesting.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
T. Lertvanithphol, P. Limnonthakul, C. Hom-on, P. Jaroenapibal, C. Chananonnawathorn, S. Limwichean, P. Eiamchai, V. Patthanasettakul, K. Tantiwanichapan, A. Sathukarn, N. Nuntawong, A. Klamchuen, H. Nakajima, P. Songsiriritthigul, M. Horprathum
Summary: This study demonstrated a non-lithography method for fabricating nanoflake aluminum oxide films with omnidirectional broadband antireflection properties. The morphology, chemical composition, and optical properties of the prepared samples were characterized, showing that the optimal optical performance was achieved with a single nanoflake film layer. The facile fabrication process showed potential benefits for large area inexpensive omnidirectional anti-reflection coating.
Article
Energy & Fuels
Shuai Zhang, Zhenhua Wu, Zekun Liu, Yongbo Lv, Zhiyu Hu
Summary: This study presents a multiscale nanomaterial prepared by in situ polymerization of polyaniline nanoparticles on porous anodic aluminum oxide membrane. The nanomaterial exhibits broadband solar absorption and offers a platform for efficient photothermal conversion.
Article
Chemistry, Physical
Chiu-Yen Wang, An-Hsuan Hsu, Yi-Chen Lin, Ya-Chu Hsu
Summary: Monocrystalline InSe nanowires with a [100] growth direction were successfully prepared via vacuum hydraulic pressure injection at low temperature. The fabricated nanowires were used to create a high-responsivity photodetector with low dark current and rapid rise and fall times.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Optics
Jimin Fang, Bo Wang, Kunhua Wen, Ziming Meng, Zhaogang Nie, Fangteng Zhang, Xiangjun Xing, Li Chen, Liang Lei, Jinyun Zhou
Summary: A polarization-independent ultra-broadband T-type absorber with doped silicon in the terahertz band has been proposed, demonstrating high absorption rates and excellent performance in terms of absorption bandwidth and relative bandwidth ratio. The energy distribution of the electromagnetic field has been clearly explained using finite element method, and comparative analysis shows superior performance compared to other absorbers.
Article
Chemistry, Analytical
Hana Lim, Chang Su Jeon, Young Min Park, Ho Nyun Lee, Sung Hyun Pyun, Hyun-Jong Kim
Summary: A controllable method for fabricating flexible surface-enhanced Raman scattering (SERS) substrates is demonstrated by depositing silver onto a flexible nanopillar array film. The optimized deposition process and increased nanopillar diameter and height can enhance the SERS intensity. However, high aspect ratios leading to agglomeration of the nanopillars negatively affect the SERS performance. The optimized Ag-deposited nanopillar array film exhibits excellent SERS sensitivity and signal reproducibility for application in food and biomedical analysis.
Article
Engineering, Electrical & Electronic
Zenghua Liu, Zhilin Huo, Aili Li, Cunfu He, Bin Wu
Summary: This work introduces a new omnidirectional electromagnetic acoustic transducer for generating and receiving shear-horizontal guided waves in an aluminum plate. By optimizing the magnet sizes and adding acrylic spacers, the transducer can achieve an omnidirectional sound field. The effectiveness of the optimization method was verified through simulations and experiments, showing that the proposed EMAT can generate omnidirectional SH0 mode guided waves in an aluminum plate.
IEEE SENSORS JOURNAL
(2021)
Article
Green & Sustainable Science & Technology
Hengyu Guo, Jie Chen, Longfei Wang, Aurelia Chi Wang, Yafeng Li, Chunhua An, Jr-Hau He, Chenguo Hu, Vincent K. S. Hsiao, Zhong Lin Wang
Summary: This study introduces a corona-type, mechanically stimulated triboelectric NAI generator that efficiently produces negative air ions for air purification. The device is simple, safe, and effective, offering a sustainable solution for improving indoor air quality.
NATURE SUSTAINABILITY
(2021)
Article
Chemistry, Analytical
Wei-Chih Cheng, Lu-Hung Chen, Ci-Ren Jiang, Yu-Ming Deng, Wei Wang, Chi-Hung Lin, Ruwen Jou, Juen-Kai Wang, Yuh-Lin Wang
Summary: This study describes a differential diagnosis method using the surface-enhanced Raman scattering (SERS) measurement of molecules released by Mycobacterium species. A novel sensible functional linear discriminant analysis (SLDA) method was employed to effectively discriminate not only MTBC but also species of NTM. The successful demonstration of this SERS-SLDA method opens up new opportunities for the rapid differentiation of Mycobacterium species.
ANALYTICAL CHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
Danhao Wang, Chen Huang, Xin Liu, Haochen Zhang, Huabin Yu, Shi Fang, Boon S. Ooi, Zetian Mi, Jr-Hau He, Haiding Sun
Summary: This study reports the demonstration of self-powered deep UV solar-blind photodetectors in a photoelectrochemical cell configuration, showing excellent responsivity, fast response speed, and large photocurrent density at 254 nm illumination. The superior performance can be attributed to the successful synthesis of uniform and defect-free AlGaN nanowires as well as the boosted carrier separation and collection efficiency through Ru decoration.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Olga Dvoynenko, Shih-Lin Lo, Yi-Ju Chen, Guan Wei Chen, Hsin-Mei Tsai, Yuh-Lin Wang, Juen-Kai Wang
Summary: Identification and quantification of chromium in water, especially the differentiation between toxic Cr(VI) and harmless Cr(III), can be achieved through surface-enhanced Raman scattering (SERS) based on distinct spectral features. The method shows high sensitivity and selectivity at pH 10 and 5.5 for Cr(VI) and Cr(III) detection, with a limit of detection below 0.1 mg/L and an error of 10% in quantification. This SERS technique is also insensitive to the presence of co-existing Cr(III) and holds potential for monitoring toxic chromium in various fields.
Article
Multidisciplinary Sciences
Chun-Chih Hsu, Bo-Chao Huang, Michael Schnedler, Ming-Yu Lai, Yuh-Lin Wang, Rafal E. Dunin-Borkowski, Chia-Seng Chang, Ting-Kuo Lee, Philipp Ebert, Ya-Ping Chiu
Summary: The study utilized scanning tunneling microscopy to achieve atomic-scale real-space imaging of YBa2Cu3O6.81, revealing the microscopic spatial interplay between charge order and superconducting phase. Nanodomains of charge order were found embedded in the superconducting phase, with a proximity-like boundary region characterized by mutual suppression, shedding light on the impact of competing orders on superconductivity.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Yun-Chu Chen, Shang-Wen Hong, Huang-Hesin Wu, Yuh-Lin Wang, Yih-Fan Chen
Summary: A method based on SERS technology and sample pretreatment process enables rapid, sensitive, reproducible, multiplexed, and low-cost detection of illegal drugs in urine. By inducing AgNPs to form Ag nanoclusters with sodium bromide, the detection sensitivity of NPS is greatly improved, allowing for simultaneous detection of multiple drugs.
Article
Biophysics
Cheng-Chieh Liao, Yi-Zih Chen, Shang-Jyun Lin, Ho-Wen Cheng, Juen-Kai Wang, Yuh-Lin Wang, Yin-Yi Han, Nien-Tsu Huang
Summary: Bloodstream infection (BSI) is a serious global public health issue, and timely and effective antibiotics are crucial for patient outcomes. This study aimed to simplify sample preparation steps in Surface-enhanced Raman scattering (SERS) -based bacterial detection and antimicrobial susceptibility testing (AST) using an automated microfluidic control system. The system achieved on-chip reagent replacement, bacteria trapping, and buffer exchange, demonstrating the potential for timely microbiological support for optimized early antibiotic therapy.
BIOSENSORS & BIOELECTRONICS
(2021)
Article
Chemistry, Physical
Yu-Chi Chang, Mykhaylo M. Dvoynenko, Hao Ke, Hui-Hsin Hsiao, Yuh-Lin Wang, Juen-Kai Wang
Summary: Silver nanoparticles grown in nanochannels of anodic aluminum oxide on a grating form a surface-enhanced Raman scattering (SERS) substrate with double resonance from both localized and delocalized plasmons. The addition of a grating enhances the SERS signals, which are inherently wavelength-dispersed, enabling simpler designs of SERS-based sensors without the need for a spectrometer. Angle-resolved reflectance spectroscopy and electrodynamic simulation were utilized to characterize the surface plasmon polariton (SPP) of the grating and confirm the SERS enhancement mechanism.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Materials Science, Coatings & Films
Kuan-Syun Wang, Zi-Ling Tseng, Chih-Yi Liu, Tsai-Yu Kuan, Ru-Jong Jeng, Ming-Chien Yang, Yuh-Lin Wang, Ting-Yu Liu
Summary: A new flexible, super-hydrophobic, and highly sensitive PDMS-based substrate was developed for SERS detection by depositing organic conjugated molecules films and Au nanoislands. The Au@DFH-4T nanostructure with a hydrophobic ivy-like nanostructure showed excellent performance in detecting hydrophobic molecules at ultralow concentrations. The flexible SERS sensor exhibited efficiency and durability after bending tests.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Yuen Yung Hui, Yi-Xiu Tang, Terumitsu Azuma, Hsin-Hung Lin, Fang-Zhen Liao, Qing-Ying Chen, Jen-Hwa Kuo, Yuh-Lin Wang, Huan-Cheng Chang
Summary: In this study, a low-cost and portable lateral flow immunoassay (LFIA) reader based on photothermal detection was developed. The LFIA reader utilized a low-power green laser as the heating source and a single-element infrared sensor as the detector for accurate quantitative detection of reporters captured on LFIA strips. The results showed that photothermal detection significantly enhanced the sensitivity of LFIA and enabled quantitative analysis to support critical decision-making.
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
(2022)
Article
Multidisciplinary Sciences
Terumitsu Azuma, Yuen Yung Hui, Oliver Y. Chen, Yuh-Lin Wang, Huan-Cheng Chang
Summary: Temperature sensing is a promising method for enhancing the detection sensitivity of lateral flow immunoassay (LFIA) in point-of-care testing. By exciting fluorescent particles or colored latex beads, a temperature increase of over 100 degrees C can be achieved with a low-power laser. This study provides a fundamental understanding of thermometric assay using non-fluorescent latex beads deposited on a nitrocellulose membrane. The research reveals that the absorption of light by red and black latex beads at 520 nm is enhanced by 1.3-fold and 3.2-fold, respectively, due to the multiple scattering of light in the highly porous medium. The CLB-based thermometric assay demonstrates a 10x higher sensitivity than color visualization, similar to previous studies using gold nanoparticles. The practical application of this thermometric immunoassay for rapid antigen tests of COVID-19 is demonstrated.
SCIENTIFIC REPORTS
(2022)
Article
Materials Science, Multidisciplinary
Fang Yin Zhao, Thi Anh Nguyet Nguyen, Chia-Wei Tsai, Che-Men Chu, Wei-Yen Woon, Chien-Ting Wu, Kun-Lin Lin, Yo-Song Huang, Chih-Ming Wang, Fan-Ching Chien, Kun-Yu Lai
Summary: Surface-enhanced Raman spectroscopy (SERS) is a technique capable of verifying the presence of single molecules. Researchers favor the bianalyte proof which relies on statistical analysis of thousands of spectra and extends the plasmonic fields through coupling InGaN quantum dots with Au nanoparticles. This new method redefines the rule for single-molecule detection.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Loganathan Ravi, Muzafar Ahmad Rather, Kun-Lin Lin, Chien-Ting Wu, Tung-Yuan Yu, Kun-Yu Lai, Jen-Inn Chyi
Summary: In this study, h-BN films were grown on 150 mm Si(111) substrates by metal-organic chemical vapor deposition, and the van der Waals epitaxy of GaN on the h-BN films was investigated. Self-exfoliation of GaN films was observed on GaN of thickness 1 μm and more, which was resolved by decreasing the h-BN thickness. Based on the exfoliation behavior, a self-exfoliation mechanism was proposed and an interface binding energy of 54 meV was estimated for the h-BN/AlN interface.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Biochemical Research Methods
Shang-Jyun Lin, Po-Hsuan Chao, Ho-Wen Cheng, Juen-Kai Wang, Yuh-Lin Wang, Yin-Yi Han, Nien-Tsu Huang
Summary: This paper presents a microfluidic device that generates a concentration gradient for antibiotics in order to perform antibiotic treatment on bacteria. The system simplifies and speeds up the process of antimicrobial susceptibility testing.
Article
Nanoscience & Nanotechnology
Fan-Ching Chien, Ting Fu Zhang, Chi Chen, Thi Anh Nguyet Nguyen, Song-Yu Wang, Syuan Miao Lai, Chia-Hua Lin, Chun-Kai Huang, Cheng-Yi Liu, Kun-Yu Lai
Summary: This study addresses the reliability issue of SERS detection by greatly expanding the effective area of hot spot with conformally nano-structured InGaN. By introducing wafer-scale charge coupling at the molecule/metal/semiconductor interface, the SERS-active surface spreading has been increased, allowing for better capture of trace molecules and stabilized signals.
ACS APPLIED NANO MATERIALS
(2021)