Article
Chemistry, Multidisciplinary
Mingyu Lee, Semin Kim, Minsoo Jang, Hyun S. Park, Jae Young Lee
Summary: In this study, a novel strategy was proposed to fabricate a high-performance biosensor platform by one-step electrochemical coating of PDA/PPy with enzymes (GOx and LOx). The PDA/PPy/GOx biosensor exhibited significantly improved sensitivity and stability compared to PPy/GOx, while the PDA/PPy/LOx biosensor showed enhanced lactate sensing ability. This facile fabrication strategy involving PDA/PPy and enzymes serves as an attractive platform for highly sensitive and stable biosensors.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Polymer Science
Natalija German, Almira Ramanaviciene, Arunas Ramanavicius
Summary: The research developed improved enzymatic biosensors based on conducting polymer nanocomposites and glucose oxidase, showing high sensitivity, low detection limit, wide linear range, good repeatability, and stability. Additionally, the electrode demonstrated excellent anti-interference ability against interfering substances and successful practical application for glucose determination in serum samples.
Article
Biochemistry & Molecular Biology
Muhammad Adnan Ashraf, Atif Islam, Muhammad Arif Butt, Tajamal Hussain, Rafi Ullah Khan, Shahid Bashir, Javed Iqbal
Summary: The study fabricated mixed matrix membranes (MMMs) of cellulose acetate/poly(vinylpyrrolidone) (CA/PVP) infused with acid functionalized multiwall carbon nanotubes (f-MWCNTs) for hemodialysis application. Characterization using FTIR, SEM, and other methods showed improved thermal stability, water permeate flux, and surface morphological analysis with the incorporation of f-MWCNTs. Urea and creatinine clearance performance also significantly increased with the f-MWCNTs integrated membranes.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Environmental Sciences
Somaye Cheraghi, Mohammad A. Taher, H. Karimi-Maleh, Fatmeh Karimi, Mehdi Shabani-Nooshabadi, Marzieh Alizadeh, Amani Al-Othman, Nevin Erk, Praveen Kumar Yegya Raman, Ceren Karaman
Summary: In this study, a novel enzymatic biosensor based on GSH-Px, GO, and nafion was developed for the electrochemical sensing of GSH in body fluids. The biosensor showed improved detection sensitivity and reliability, successfully used for the determination of GSH in real samples.
Article
Chemistry, Analytical
Dongwei Wang, Jiasheng Wang
Summary: The study demonstrated the potential of functionalized polypyrrole nanowires as a platform for label-free miRNA detection using EIS, and constructed a sensitive and selective miRNA biosensor based on PPyNWs/PAMAM hybrid. The biosensor showed excellent sensing performances in monitoring DNA/miRNA hybridization, indicating the microstructure of the PPy nanowires array greatly improved its performance.
Article
Chemistry, Multidisciplinary
B. M. Hryniewicz, J. Volpe, L. Bach-Toledo, K. C. Kurpel, A. E. Deller, A. L. Soares, J. M. Nardin, L. F. Marchesi, F. F. Simas, C. C. Oliveira, L. Huergo, D. E. P. Souto, M. Vidotti
Summary: This study reports a promising impedimetric biosensor based on conducting polymers for monitoring SARS-CoV-2 seroconversion. The biosensor was developed using different morphologies of polypyrrole (PPy) and gold nanoparticles, along with a self-assembly monolayer and covalently linked SARS-CoV-2 Nucleocapsid protein. The results demonstrated a linear response, good sensitivity, and the ability to discriminate serum from COVID-19 positive and negative clinical samples.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Materials Science, Ceramics
Jacquelyne Y. Zarria-Romero, Joao-Andre Ocampo-Anticona, Camila N. Pinotti, Edson C. Passamani, Noemi-Raquel Checca-Huaman, Isabel-Liz Castro-Merino, Betty Shiga, Juan A. Ramos-Guivar
Summary: In this investigation, the nanotoxicity of two magnetic nanohybrids (JA1 and JA2) consisting of nanomaghemite dispersed in activated multiwall carbon nanotubes and graphene oxide, respectively, were analyzed. It was found that high-power lasers caused defects and misalignments in the multiwall carbon nanotubes of the JA1 nanohybrid, resulting in activation of the nanomaghemite. On the other hand, graphene oxide acted as a template for nanomaghemite growth in the JA2 nanohybrid. The exposure of Daphnia magna to the nanohybrids showed negative effects at high concentrations but biocompatibility at low concentrations.
CERAMICS INTERNATIONAL
(2023)
Article
Polymer Science
Ai Ling Pang, Agus Arsad, Mohsen Ahmadipour, Azrul Azlan Hamzah, Muhammad Abbas Ahmad Zaini, Rahmat Mohsin
Summary: In this study, PPy-MWCNTs nanocomposites were synthesized using the ultrasonic-assisted in-situ chemical polymerization route, and the impact of MWCNTs on the properties of PPy was investigated. The results showed that the addition of MWCNTs increased the crystallinity of PPy and improved the photocatalytic activity of PPy-MWCNTs nanocomposites.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2022)
Article
Chemistry, Physical
S. J. Shivaraja, R. K. Gupta, V Manjuladevi
Summary: Polymer dispersed liquid crystals (PDLCs) containing ODA-SWCNT dispersions were prepared and their electro-optical properties were studied. Compared to pure PDLCs, the PDLCs with ODA-SWCNT dispersions showed a shorter response time, lower threshold voltage, higher optical transparency, and better image sharpness in the ON-state.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Nanoscience & Nanotechnology
Chaofeng Wang, Yi Hao, Yue Wang, Huijia Song, Sameer Hussain, Ruixia Gao, Luyao Gao, Yulian He, Guodong Zheng, Yuhai Tang
Summary: A facile method was used to functionalize multiwall carbon nanotubes with a porphyrin-Sn network layer, enhancing protein adsorption. The shell thickness can be precisely controlled by adjusting precursor ratios, resulting in high protein adsorption capacity under optimized conditions. The modified material exhibited excellent performance in protein adsorption due to the abundant uniformly distributed adsorption sites on its surface.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Jaroslav Stejskal, Fahanwi Asabuwa Ngwabebhoh, Miroslava Trchova, Jan Prokes
Summary: This paper reports the conversion of waste leather into a conducting material through carbonization and deposition of polypyrrole nanotubes. The resultant composite of carbonized leather and polypyrrole nanotubes exhibits higher conductivity and adsorption capacity, making it suitable for dye adsorption and electrode materials.
Article
Plant Sciences
Dorina Podar, Camelia-Loredana Boza, Ildiko Lung, Maria-Loredana Soran, Otilia Culicov, Adina Stegarescu, Ocsana Opris, Alexandra Ciorita, Pavel Nekhoroshkov
Summary: The aim of this study was to evaluate the effect of six nanomaterials on lettuce. The results showed that the content of bioactive compounds and antioxidant capacity varied depending on the nanomaterial used. CNTs functionalized with metal oxides increased the elemental concentration in lettuce leaves, while metal oxide nanoparticles and CNTs functionalized with carboxyl groups decreased the concentration of many elements. Soil amendment with MnO2 affected the content of more than ten elements in leaves. Simultaneous application of CNTs and MnO2 stimulated elemental translocation from roots to leaves, while simultaneous use of CNTs and Fe3O4 led to the most intense translocation.
Article
Chemistry, Inorganic & Nuclear
Veronika Poltavets, Miroslaw Krawczyk, Ganna Maslak, Olga Abraimova, Martin Jonsson-Niedziolka
Summary: We present a cheap and environmentally friendly working electrode material for glucose biosensors with good catalytic properties. By using manganese dioxide as the base material and modifying the surface with glucose oxidase enzyme, we achieved a sensitive electrode with a comparable performance to those based on expensive materials.
DALTON TRANSACTIONS
(2023)
Article
Biophysics
Insu Kim, Young Im Kim, Sang Won Lee, Hyo Gi Jung, Gyudo Lee, Dae Sung Yoon
Summary: The study found that the uric acid transporter 1 (URAT1) abundant in kidney cell membranes can be utilized to develop a biosensor capable of selectively detecting uric acid.
BIOSENSORS & BIOELECTRONICS
(2021)
Article
Polymer Science
Marcelo Costa Flores, Katia Cecilia de Souza Figueiredo
Summary: Separating carbon dioxide from flue gases is a significant challenge, and membrane processes show promise in overcoming technical and economic constraints with the development of advanced materials.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Marya Khan, Rafiq Ahmad, Nirmalya Tripathy, Ajit Khosla, M. Iqbal R. Khan, Prabhash Mishra, Mansoor Ali Syed, Waquar Akhter Ansari
Summary: By synthesizing nano-chips shaped nickel hydroxide (Ni(OH)(2)) nanostructures, the possibilities provided by the nanostructure morphology of nano-materials can be exploited in sensing applications. The fabricated hydrazine sensor, which was modified with the nano-chips shaped Ni(OH)(2) nanostructures, showed ultra-high sensitivity, a linear response in a wide concentration range, and a lower detection limit during hydrazine sensing. The fabricated hydrazine sensor also exhibited highly reproducible fabrication process, stability, and selectivity. These nano-chips shaped Ni(OH)(2) nanostructures hold significant potential for future applications in nano-material-based chemical/biological sensors.
MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS
(2022)
Article
Engineering, Electrical & Electronic
Rafiq Ahmad, Marya Khan, Mohammad Rizwan Khan, Nirmalya Tripathy, M. Iqbal R. Khan, Prabhash Mishra, Mansoor Ali Syed, Ajit Khosla
Summary: In this study, nano-donut shaped nickel oxide (NiO) nanostructures were synthesized using a simple low-temperature hydrothermal process. The synthesized nanostructures were characterized to have large quantity and relatively uniform morphology. The nano-donut shaped NiO nanostructures were used to fabricate electrochemical based non-enzymatic glucose sensors, which exhibited high sensitivity and low detection limit. These nanostructures have the potential for electrochemical sensing of other biochemical analytes.
MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS
(2022)
Article
Engineering, Environmental
Kiesar Sideeq Bhat, Rafiq Ahmad, Tahmineh Mahmoudi, Yoon-Bong Hahn
Summary: The study presents a novel approach for simultaneous and selective detection of multiple ions using ZnO nanorods FETs array sensor, which showed great potential for application in smart farms and water maintaining systems with excellent agreement, stability, and reproducibility in sensing performance.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Materials Science, Multidisciplinary
Navjyoti Boora, Rafiq Ahmad, Poonam Rani, Pankaj Kumar Maheshwari, Ajit Khosla, Sonia Bansal, V. P. S. Awana, A. K. Hafiz
Summary: The La2/3Ca1/3MnO3:Silver(x) (LCMO-Ag-x) composite material was synthesized and the introduction of silver doping was found to enhance its magneto-resistance effect and improve grain connectivity and size. The Curie temperature of the composite material was increased by 8 K compared to the pristine material, showing potential for applications in ferroelectromagnetics and spintronics.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2021)
Article
Environmental Sciences
Iram Wahid, Pratibha Rani, Sarika Kumari, Rafiq Ahmad, Sofi J. Hussain, Saud Alamri, Nirmalya Tripathy, M. Iqbal R. Khan
Summary: Green-synthesized gold nanoparticles can help wheat plants improve the K+/Na+ ratio, chlorophyll concentration, defense systems, nitrogen assimilation, stomatal dynamics, and growth traits under salt stress conditions, while controlling the excessive accumulation of oxidative stress markers.
Article
Electrochemistry
Marya Khan, Vandana Nagal, Sakeena Masrat, Talia Tuba, Nirmalya Tripathy, Mohammad K. Parvez, Mohammed S. Al-Dosari, Ajit Khosla, Hidemitsu Furukawa, A. K. Hafiz, Rafiq Ahmad
Summary: An EGT-based biosensor utilizing Fe2O3 nanoparticles decorated ZnO nanorods was developed for cholesterol detection, showing high sensitivity and a wide linear range. This biosensor demonstrated excellent specificity, reproducibility, stability, and applicability in real serum samples, making it a promising platform for future analyte detection.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Navjyoti Boora, Prince Sharma, Asrar Alam, Shafaque Rahman, Rafiq Ahmad, V. P. S. Awana, A. K. Hafiz
Summary: The magneto-resistance properties of mixed-valent perovskite manganite can be modified by doping with nickel oxide. The addition of 10% NiO increases the magneto-resistance near the metal-insulator transition temperature, resulting in a significantly higher magneto-resistance compared to the pristine sample.
MATERIALS LETTERS-X
(2022)
Article
Chemistry, Analytical
Marya Khan, Vandana Nagal, Sakeena Masrat, Talia Tuba, Shamshad Alam, Kiesar Sideeq Bhat, Iram Wahid, Rafiq Ahmad
Summary: Nanomaterial-based biosensors, specifically the electrolyte-gated FET-based glucose biosensor with vertically grown zinc oxide nanorods, exhibit high sensitivity, low detection limit, and potential for application in blood samples.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Vandana Nagal, Marya Khan, Sakeena Masrat, Shamshad Alam, Akil Ahmad, Mohammed B. Alshammari, Kiesar Sideeq Bhat, Rafiq Ahmad
Summary: Enzymeless sensors are stable, fast, and reliable devices for biomolecule detection and disease diagnosis. In this study, hexagonal cobalt oxide nanosheets were synthesized using a hydrothermal method, and then utilized to fabricate an ultra-sensitive enzymeless electrochemical-based uric acid (UA) sensor. The cobalt oxide nanosheet-based UA sensor showed a good response for UA detection, with ultra-sensitivity and a low limit of detection. The developed sensor demonstrated good stability, reproducibility, and specificity for UA.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Vladimir Platonov, Prachi Sharma, Mikhail Ledyaev, Maria A. Anikina, Nikolay Alekseevich Djuzhev, Maksim Yuryevich Chinenkov, Nishant Tripathi, Sania Parveen, Rafiq Ahmad, Vladimir Pavelyev, Ammar A. Melaibari
Summary: This paper presents the design and fabrication of a new generation of microelectromechanical systems (MEMS) based microfluidic preconcentrators (MFP) for quantification of volatile organic compounds (VOCs). The proposed MFP system, which includes two continuous-action microfluidic preconcentrators and a system of four 3/2 solenoid valves with a control unit, effectively concentrates n-pentane impurities and demonstrates fast response and stability with the use of Al2O3 and n-octane ResSil-C sorbents.
Article
Chemistry, Analytical
Sakeena Masrat, Vandana Nagal, Marya Khan, Iqra Moid, Shamshad Alam, Kiesar Sideeq Bhat, Ajit Khosla, Rafiq Ahmad
Summary: Transition metal oxide (TMO)-based nanomaterials are effectively utilized to fabricate clinically useful ultra-sensitive sensors. In this study, porous cobalt oxide nanosheets were successfully synthesized using a hydrothermal method. The morphology and crystal characteristics of the nanosheets were investigated, confirming their porous structure and crystallinity. The uric acid sensor fabricated using these nanosheets exhibited ultra-high sensitivity and demonstrated good selectivity and storage ability.
Article
Chemistry, Analytical
Vandana Nagal, Sakeena Masrat, Marya Khan, Shamshad Alam, Akil Ahmad, Mohammed B. Alshammari, Kiesar Sideeq Bhat, Sergey M. Novikov, Prabhash Mishra, Ajit Khosla, Rafiq Ahmad
Summary: In this study, puffy balls-like cobalt oxide nanostructure was synthesized through a hydrothermal method and used for the fabrication of a non-enzymatic electrochemical sensor. The cobalt oxide nanostructure-modified electrode exhibited excellent electro-catalytic activity during the detection of uric acid. Additionally, the differential pulse voltammetry technique showed higher sensitivity compared to cyclic voltammetry for the non-enzymatic electrochemical uric acid sensor.
Article
Chemistry, Multidisciplinary
Sakeena Masrat, Rafiq Ahmad, Umesh T. Nakate, Akil Ahmad, Mohammed B. Alshammari, Kiesar Sideeq Bhat, Prabhash Mishra, Byeong-il Lee
Summary: In this study, an electrochemical non-enzymatic hydrazine sensor was developed using an ultrathin nanosheet-like CuO nanostructure. The sensor exhibited good sensitivity and a wide detection range, as well as advantages such as low cost, stability, and selectivity.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Vandana Nagal, Talia Tuba, Virendra Kumar, Shamshad Alam, Akil Ahmad, Mohammed B. Alshammari, Aurangzeb Khurram Hafiz, Rafiq Ahmad
Summary: In this study, a high-performance non-enzymatic electrochemical sensor was developed using hydrothermally synthesized cobalt oxide nanostructures. The sensor exhibited excellent sensing performance for uric acid detection, with the nano-berry shaped structure of cobalt oxide promoting its performance and potential in early-stage disease diagnosis.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Mohammed Nazim, Aftab Aslam Parwaz Khan, Firoz Khan, Sung Ki Cho, Rafiq Ahmad
Summary: In this work, a facile and environmentally friendly synthesis strategy for large-scale preparation of Cr-doped hybrid organometallic halide perovskite nanocrystals was developed. The Cr3+ cation- doped perovskite nanocrystals displayed changes in crystallinity and crystal structure, but show promise as light-harvesting materials for optoelectronic applications in the future.
NANOSCALE ADVANCES
(2022)
