Article
Optics
Mohsen Samadi, Pooya Alibeigloo, Abolfazl Aqhili, Mohammad Ali Khosravi, Farahnaz Saeidi, Shoaib Vasini, Mostafa Ghorbanzadeh, Sara Darbari, Mohammad Kazem Moravvej-Farshi
Summary: Plasmonic tweezers are indispensable tools for manipulating micro and nano-objects with high precision, utilizing surface plasmon technology to trap particles beyond the diffraction limit. Trapping-potential landscape can be reconfigured by designing plasmonic nanostructures.
OPTICS AND LASERS IN ENGINEERING
(2022)
Article
Engineering, Electrical & Electronic
Xinran Wei, Rui Li, Yuzhang Liang, Shuwen Chu, Xin Zhang, Yurui Fang, Wei Peng
Summary: This study develops and theoretically demonstrates an efficient alternative method for achieving SPR on a flat gold film on the end facet of an optical fiber through diffracting coupling of a nanograting. The operating wavelength of the SPR can be adjusted continuously over a broad spectral range from visible to near-infrared light. The sensing performances of the proposed nanograting-coupled FOSPR sensors with different specified resonance wavelengths are numerically investigated, and the highest bulk refractive index sensitivity is obtained at the operating wavelength of 1550 nm. The proposed sensing platform can extend the utility of FOSPR sensing technology in practical application fields such as disease diagnosis and environment monitoring due to the ease of wavelength adjustment and compact integration on the end facet.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Optics
Yi-shi Xu, Zhen-ze Li, Zi-han Wang, Hong Xia, Yue-feng Liu, Saulius Juodkazis, Qi-dai Chen, Lei Wang
Summary: Femtosecond laser-induced deep-subwavelength structures have gained attention as a nanoscale surface texturization technique. Non-reciprocal writing via tailored optical far-field exposure is demonstrated, achieving continuous manipulation of ripple period on indium tin oxide (ITO) film. A full electromagnetic model is developed to explain the formation of ripples and the asymmetry of focal spot determines the non-reciprocity. This non-reciprocal writing technique offers new possibilities for precise and controllable nanoscale surface texturing.
Article
Automation & Control Systems
Yihua Fang, Xin Dong, Abdelkhalick Mohammad, Dragos Axinte
Summary: This article presents a hybrid sensing solution for improving the control performance of a multisection cable-driven continuum robot. The solution consists of a dual displacement sensor system and a self-carried visual tracking system. The dual displacement sensor system measures cable-displacement error and predicts cable elongation to eliminate control error, while the self-carried visual system provides real-time tip tracking to improve controllability. The results show that the proposed system has high measurement accuracy and achieves accurate tip-positioning control.
IEEE-ASME TRANSACTIONS ON MECHATRONICS
(2023)
Article
Computer Science, Hardware & Architecture
Ziyue Zhang, Didier Colle, Wouter Tavernier, Mario Pickavet
Summary: In this paper, a network architecture for a multi-chip optical network-on-wafer (NoW) is proposed, with a focus on control mechanisms and algorithms. The goal is to provide dynamically controlled terabytes-per-second unidirectional bandwidth for each chip module in a multi-chip processor. This architecture shows promise in achieving low energy consumption and high aggregated bandwidth, offering a competitive idea for future optical-connected multi-chip computing systems. A synchronous network control scheme and improved edge coloring algorithms are proposed for slowly varying traffic patterns, resulting in lower time complexity and faster execution compared to existing methods.
JOURNAL OF OPTICAL COMMUNICATIONS AND NETWORKING
(2023)
Article
Automation & Control Systems
Vasileios Tzoumas, Luca Carlone, George J. Pappas, Ali Jadbabaie
Summary: The study focuses on the joint design of sensing and control policies, tackling two dual problem instances: sensing-constrained LQG control and minimum-sensing LQG control. While no polynomial time algorithm guarantees a constant approximation factor from the optimal across all problem instances, the authors present the first polynomial time algorithms with per-instance suboptimality guarantees. The research frames LQG codesign as the optimization of approximately supermodular set functions, developing novel algorithms and establishing connections between suboptimality and control-theoretic quantities.
IEEE TRANSACTIONS ON AUTOMATIC CONTROL
(2021)
Review
Biochemistry & Molecular Biology
Anabel Lostao, KeeSiang Lim, Maria Carmen Pallares, Arkadiusz Ptak, Carlos Marcuello
Summary: Biomolecular interactions are crucial for cellular processes, and understanding their association and dissociation events is important for biomedical and industrial applications. Atomic force microscopy (AFM) is a valuable technique for quantitatively characterizing these interactions at the single molecule level. This review presents recent methodological advances in AFM-based force spectroscopy, including bioconjugation, immobilization, AFM tip functionalization, dynamic force spectroscopy measurements, molecular recognition imaging, and theoretical modeling. The review is expected to aid in understanding the principles of AFM-FS technique and the potential of AFM-FS compared to other nanotechnology techniques.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Engineering, Electrical & Electronic
Jackson C. S. Batista, Marcus V. S. Costa, Leiva C. Oliveira
Summary: Surface plasmon resonance (SPR) based sensors are commonly used for detecting molecular interactions, but inherent noise sources in the sensor instrumentation can affect the quality of measurements. The smart-filter NNSF, based on multilayer artificial neural networks, is designed to eliminate instrumental noise and improve sensor performance without the need for additional components or costly maintenance.
IEEE SENSORS JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Jian Zhang, Qiang Li, Chenjie Dai, Mingliang Cheng, Xin Hu, Hyun-Sik Kim, Heesun Yang, Daniel J. Preston, Zhongyang Li, Xuefeng Zhang, Won-Kyu Lee
Summary: This paper presents a general approach to developing tunable plasmonic metasurfaces with hydrogel meta-atoms at the subwavelength scale. The size of hydrogel nanodots can be reversibly controlled by absorbing or releasing water, resulting in humidity-responsive surface plasmon polaritons (SPPs) that generate plasmonic color rendering in the visible spectrum. The size variations of constituent hydrogel nanostructures enable broadband beam-steering on a phase modulator.
Article
Engineering, Electrical & Electronic
Tingting Yuan, Xiaotong Zhang, Qi Xia, Yiping Wang, Libo Yuan
Summary: The novel dual-core fiber with a large side air hole can integrate microchannel and interferometer, suitable for compact in-fiber integrated microfluidic sensors.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Seongheon Baek, Sanggyun Jeong, Hyeong Woo Ban, Jiyeon Ryu, Yoonkyum Kim, Da Hwi Gu, Changil Son, Tae-Sik Yoon, Jiseok Lee, Jae Sung Son
Summary: Direct optical printing of functional inorganics has great potential for creating intricate patterns and affordable devices. However, precise control of vertical thickness in 3D structures has been overlooked. In this study, a generalized optical 3D printing process using maskless digital light processing is presented, enabling high-resolution and cost-effective fabrication of inorganic nanoparticle ink.
Review
Chemistry, Physical
Tingting Hong, Wenhu Zhou, Songwen Tan, Zhiqiang Cai
Summary: The cooperative relationship between biomolecules and nanomaterials creates a fascinating tale of nanoscale chiral sensing and separation. Biomolecules are considered as remarkable donors of chirality for developing chiral sensors and separation systems. Various nanomaterials with specific physicochemical attributes can transmit and amplify this chirality.
NANOSCALE HORIZONS
(2023)
Article
Crystallography
Ji Xia, Fuyin Wang, Chunyan Cao, Zhengliang Hu, Heng Yang, Shuidong Xiong
Summary: Optomechanical nanocavities utilize coupled photonic crystal nanobeam cavities to achieve strong coupling between an optical cavity and a mechanical oscillator, leading to abundant optomechanical phenomena and ultra-sensitive motion measurements.
Article
Chemistry, Multidisciplinary
Liliia Mavliutova, Elena Verduci, Borje Sellergren
Summary: Aberrant sialic acid expression is a key indicator of pathological processes, specifically in tumor cells. The development of specific capture tools for these targets is crucial for early cancer diagnosis. Designing a receptor that can simultaneously recognize both the anion and cation of the target analyte is a promising approach for enhanced sialic acid recognition.
Article
Chemistry, Physical
Yuhang Wang, Zhiquan He, Xubo Lai, Boyang Liu, Yibao Chen, Liuwan Zhang, Fengping Wang
Summary: The resistive switching parameters of anatase phase polycrystalline TiO2 thin film can be controlled by light illumination and oxygen atmosphere, resulting in a forming free bipolar resistive switching effect with ON/OFF ratio over 10^4. Surface potential shift accompanied by resistance switching was reversible, and the device demonstrated good optical erasing performance. The mechanism for the observed switching behavior was confirmed to be charge trapping/detrapping, providing a new way to fabricate controllable and optical erasable resistive switching devices in nanoscale.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Sumaya H. Almenia, Adel A. Ismail, Khalid A. Alzahrani, Mutlaq Aljahdali
Summary: The synthesis and design of heterojunction nanocomposites with remarkable photocatalytic performance remain a challenge. In this work, CuMn2O4/Co3O4 nanocomposite heterojunctions were fabricated using a sol-gel strategy with soft template assistance. The CuMn2O4/Co3O4 nanocomposites exhibited significant enhancement in degradation efficiency and achieved 100% degradation of tetracycline within 75 min. The enhanced photocatalytic ability was attributed to the construction of heterojunction, synergistic effect between CuMn2O4 and Co3O4, enlarged surface area, strengthened effective charge mobility, and narrowed bandgap energy.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Khalid A. Alzahrani, Adel A. Ismail
Summary: CuMn2O4/BaSnO3 nanocomposites fabricated by hydrothermal approach exhibited superb photocatalytic performance for Ciprofloxacin degradation under visible light illumination.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Engineering, Chemical
Khalid A. Alzahrani, Adel A. Ismail, Nadiyah Alahmadi
Summary: The researchers constructed CuMn2O4/CeO2 heterojunction nanocomposites using a facile sol-gel method and evaluated their photocatalytic hydrogen evolution performance compared to pure CeO2 NPs under visible light. It was found that the H2 evolution rate of 15%CuMn2O4/CeO2 photocatalyst was five times higher than that of pure CeO2, attributed to its higher electron transport ability and electron-hole separation efficiency.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Article
Engineering, Chemical
Adel A. Ismail, L. Al-Hajji, I. S. Azad, A. Al-Yaqoot, N. Habibi, M. Alseidi, Sh. Ahmed
Summary: The study found that the Ag/TiO2 films coated with silver nanoparticles exhibited excellent antibacterial properties, with the best inhibitory effect on Vibrio parahaemolyticus, Aeromonas hydrophila, and Bacillus subtilis. Exposing the films to direct light for 3 hours was sufficient to reduce the bacterial counts. The higher antibacterial activity of Ag/TiO2, Ag/ZnO, and Ag/Fe2O3 films compared to pristine ZnO, Fe2O3, and TiO2 films might be attributed to the surface plasmon resonance of Ag nanoparticles, which facilitated the separation of charge carriers and enhanced the antibacterial activity.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Article
Chemistry, Multidisciplinary
Mohamed S. Selim, Nesreen A. Fatthallah, Mohamed A. Shenashen, Shimaa A. Higazy, Hekmat R. Madian, Mahmoud M. Selim, Sherif A. El-Safty
Summary: A catalytic hydrosilation approach was used to construct a bio-inspired porous nanocoating with micro-/nano-roughness, low surface free energy, and high fouling release efficiency. The coating showed simplicity in fabrication, ease of large-area preparation, and the ability to simultaneously offer dual micro-/nano-scale structures. This study may expand the applications of bio-inspired functional materials.
Article
Materials Science, Multidisciplinary
Ibraheem A. Mkhalid, Adel A. Ismail, Mahmoud A. Hussein, Raed H. M. Al Thomali
Summary: In this study, mesoporous V2O5-TiO2 heterojunctions were synthesized using a soft-chemistry method and evaluated for their photocatalytic performance in the degradation of tetracycline under visible light exposure. The V2O5-TiO2 nanocomposites showed higher photocatalytic activity compared to bare TiO2 and P-25, due to their enhanced visible light absorption ability, larger surface area, and improved carrier separation efficiency. The designed heterojunctions of V2O5-TiO2 nanocomposites effectively reduced the recombination rate of photoinduced carriers, resulting in enhanced photocatalytic performance.
Review
Materials Science, Multidisciplinary
Ahmed Elmasry, Wiyao Azoti, Sherif A. El-Safty, Ahmed Elmarakbi
Summary: This article discusses the importance of modeling and simulation in the materials industry, the application of multiscale techniques in studying composite materials, and the criteria for selecting appropriate models.
PROGRESS IN MATERIALS SCIENCE
(2023)
Article
Chemistry, Physical
Eslam Talaat, Mohammed Y. Emran, Hassanien Gomaa, Ahmed Kotb, Adel A. Abdelwahab, Mohamed Abdel-Hakim, Eman M. Saad, Mohamed. A. Shenashen, Sherif A. El-Safty
Summary: An active electrochemical sensor for screening adrenaline (AD) in human fluid samples and pharmaceutical drugs was developed using sulfur-doped carbon microspheres (S-CMS) and irregular-edge carbon stacked sheet (S-CSS) structures. The S-CSS-based sensor exhibited high selectivity and sensitivity with a wide detection range and a low detection limit for AD. It can be used to monitor AD in pharmaceutical drugs and human blood serum with fast response and using highly economic materials at extremely low concentrations.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Inorganic & Nuclear
Bakhitah M. Alajmi, Amal S. Basaleh, Adel A. Ismail, Reda M. Mohamed
Summary: Mesoporous Bi2S3/ZrO2 nanocomposites were synthesized using Pluronic (F-68) as a surfactant by sol-gel process and applied for thiophene oxidation under visible illumination. Bi2S3 NPs were distributed on mesoporous ZrO2 and exhibited a greater separation rate of charge carriers and extended light response compared to pure ZrO2. The optimized 15% Bi2S3/ZrO2 showed the highest photocatalytic efficiency (100%) within 105 min of visible light illumination. The photocatalytic efficiency of Bi2S3/ZrO2 nanocomposites was significantly higher than that of pure ZrO2 NPs, and the rate constant of the 15% Bi2S3/ZrO2 photocatalyst was improved 5.25 times larger than that of pure ZrO2 NPs. The improved photocatalytic ability of Bi2S3/ZrO2 nanocomposites was attributed to the formation of heterojunction Bi2S3/ZrO2, incorporation of Bi2S3 into ZrO2 and utilization of visible light in wide wavelengths.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Green & Sustainable Science & Technology
Hassanien Gomaa, Mohamed A. Shenashen, Mohamed F. Cheira, Keisuke Sueki, Tarek A. Seaf El-Nasr, Mahmoud M. Selim, Sherif A. El-Safty
Summary: The expansion of engineering and development of porous materials from agro-waste-derived for the synthesis of bio-adsorbents as efficient extractors is a significant breakthrough in the economy and environment. This study successfully prepared a novel spongy mesoporous hybrid silica (SMS-L) from wheat straw through dissolution/precipitation methodology. The SMS and SMS-L bio-adsorbents were used to extract/preconcentrate 232Th isotope from Egyptian cataclastic rock (ECR), showing high adsorption capacity depending on the pH value of the extraction process. The research provides important insights into the utilization of sustainable waste and the potential for clean energy applications.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Materials Science, Ceramics
A. A. Baoum, Adel A. Ismail
Summary: Mesoporous Li2MnO3/BaSnO3 nanocomposites were synthesized and used as photocatalysts for Atrazine degradation under visible light illumination. The nanocomposites showed significantly improved photocatalytic performance compared to bare BaSnO3 nanocrystals. The incorporation of Li2MnO3 and BaSnO3 enhanced carrier separation and extended visible light absorption. The nanocomposites exhibited high stability and promoted the transport of photoinduced electrons, preventing recombination and increasing carrier separation efficiency.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Inorganic & Nuclear
Bakhitah M. Alajmi, Amal S. Basaleh, Adel A. Ismail, Reda M. Mohamed
Summary: In this study, PdO/ZrO2 nanocomposites incorporating mesoporous ZrO2 were successfully synthesized through a sol-gel process. The obtained mesoporous ZrO2 exhibited a large surface area and the desulfurization efficiency of 1.5% PdO/ZrO2 photocatalyst was significantly higher than that of bare ZrO2 NPs. The enhanced photocatalytic activity of PdO/ZrO2 can be attributed to the mesostructured ZrO2 providing active sites and improving light absorption, as well as the accelerated mobility and separation of photoinduced carriers in the S-scheme heterojunction.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Khalid A. Alzahrani, Adel A. Ismail
Summary: In this study, WO3 nanoparticles were synthesized for the first time using a simple hydrothermal method with the assistance of polyvinylpyrrolidone (PVP). AgVO3/WO3 nanocomposites with different weight percentages of AgVO3 were successfully fabricated by impregnation-calcination processes. The 9%AgVO3/WO3 nanocomposite exhibited the best photocatalytic performance, achieving 100% degradation of Ciprofloxacin (CIP) after 120 minutes of illumination. The enhanced photocatalytic activity was attributed to the close contact between AgVO3 and WO3, which improved visible light absorption and efficient separation of charge carriers. The AgVO3/WO3 nanocomposite followed an S-scheme mechanism for charge transfer and showed high reusability and photostability. This study provides new insights into the development of highly efficient nanocomposites for environmental remediation of antibiotics.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Ibraheem A. Mkhalid, Adel A. Ismail, Mahmoud A. Hussein, Raed H. M. Al Thomali
Summary: Novel MnCo2O4 nanoparticles (NPs) supported on porous TiO2 networks were prepared for tetracycline (TC) degradation. The photocatalytic activity of the MnCo2O4/TiO2 nanocomposite was significantly higher than that of TiO2 NPs and P-25, with a degradation rate of 100% within 60 minutes.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Chemistry, Physical
Bakhitah M. Alajmi, Amal S. Basaleh, Adel A. Ismail, Reda M. Mohamed
Summary: An efficient and straightforward strategy was developed to produce mesoporous CuO/ZrO2 nanocomposite photocatalyst for thiophene desulfurization under visible exposure. The obtained CuO/ZrO2 photocatalyst exhibited superior photocatalytic ability compared to pristine ZrO2. The excellent performance was attributed to the construction of heterojunctions, large surface area, intense absorption in the visible region, easy separation of electron-hole, and the design of mesopore structure. This research provides a green and efficient method for thiophene desulfurization and offers new insights for utilizing ZrO2-based photocatalysts to treat pollutants under visible light.
SURFACES AND INTERFACES
(2023)