Article
Nanoscience & Nanotechnology
Din Zelikovich, Pavel Savchenko, Daniel Mandler
Summary: Researchers have developed a promising method for selectively detecting amino acid gold nanoparticles. By adsorption, filling, and electrochemical dissolution, they were able to create nanocavities with the shape of the nanoparticles. Spectroscopic and electrochemical studies revealed the interactions between the nanoparticles and the matrix. These findings have implications for the selective and simple sensing of nanoparticles.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Xiaoling Bao, Jianhong Liu, Qingshu Zheng, Lixin Duan, Yuzhu Zhang, Junlong Qian, Tao Tu
Summary: A colorimetric method utilizing gold nanoparticles for visual detection of melamine in raw milk was developed, with a detection limit as low as 2.4 ppb. The color change from red to blue observed by the naked eye in the presence of trace amount of melamine was attributed to the interaction between the thymine fragment and melamine.
CHINESE CHEMICAL LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Shafiquzzaman Siddiquee, Suryani Saallah, Noor Aini Bohari, Gilbert Ringgit, Jumardi Roslan, Laila Naher, Nur Fatihah Hasan Nudin
Summary: The study introduced a facile method for determining melamine in milk powder products based on the aggregation of 5 nm gold nanoparticles. The method showed high sensitivity, good recoveries, and the ability for real-time detection by the naked eye.
Article
Chemistry, Physical
Abhishek Das, Ridhima Chadha, Bhagyashree Chalke, Nandita Maiti
Summary: We report the development of a sensitive colorimetric and Raman turn-off sensor based on gold nanoparticles for the detection of melamine in milk samples. The size and shape of the gold nanoparticles are controlled by the reducing and capping agent gallic acid. The detection limit of the sensor is found to be lower than the recommended limit, making it a potential tool for industrial use.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Review
Environmental Sciences
Jawayria Najeeb, Umme Farwa, Fatima Ishaque, Hira Munir, Abbas Rahdar, Muhammad Faizan Nazar, Muhammad Nadeem Zafar
Summary: This review provides a comprehensive overview of surfactant stabilized gold nanomaterials for sensing applications. It highlights the fundamentals, preparation methodologies, and sensing mechanisms of these materials. The review categorizes surfactants and gold nanomaterials based on their structure and complexity, and discusses different types of sensors used for analyte detection. The review also discusses future perspectives for further research in this field.
ENVIRONMENTAL RESEARCH
(2022)
Article
Chemistry, Physical
Hirak Chatterjee, Dorothy Bardhan, Sudip Kumar Pal, Keiji Yanase, Sujit Kumar Ghosh
Summary: A retrospective formalism has been designed through critical condensation of electromagnetic scattering theories, macroscopic mixing rules, and micromechanics at the metal-analyte interface, which can be adopted as a generalized model.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Optics
Bijoy Sankar Boruah, Rajib Biswas
Summary: A low cost and environment friendly assessment procedure for the detection of hazardous lead ions in aqueous medium is reported in this study. By using biocompatible materials and gold nanoparticles, functionalized for selective binding of lead ions, a highly selective response with excellent sensitivity was achieved on a U-shaped optical fiber sensor probe. Validation with real sample testing confirmed the effectiveness of this approach with a detection limit of 1 ppb and a linear range of 1-7 ppb. The ease portability, rapid detection, and cost effectiveness make this scheme widely acceptable.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Faria Shakeel, Muhammad Waseem Fazal, Anam Zulfiqar, Farhan Zafar, Naeem Akhtar, Arsalan Ahmed, Hafiz Badaruddin Ahmad, Safeer Ahmed, Asad Syed, Ali H. Bahkali, Muhammad Abdullah, Zahid Shafiq
Summary: In this study, a novel N-rich carbon-coated Au nanoparticles (NC@Au-NPs) were fabricated and their catalytic efficacy and shelf life were boosted by applying a mixture of polydopamine (PDA) and benzimidazolium-1-acetate ionic liquid (IL) as a sandwich between the working electrode surface and the designed nanohybrid NC@Au-NPs as a redox mediator. The results showed that the designed NC@Au/PDA-IL/GPE exhibited excellent sensitivity, selectivity, and reproducibility.
Article
Chemistry, Analytical
Asiye Aslihan Avan, Hayati Filik, Birsen Demirata
Summary: A new method using magnetic nanoparticles for magnetic solid-phase separation of Cr(VI) and a chemical optical probe based on gold nanoparticles were developed for the detection of Cr(VI) ions. The method showed high sensitivity and selectivity and was effective for quantifying Cr(VI) in different water samples.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Analytical
Elizaveta P. Morozova, Tatiana E. Smoliarova, Kirill A. Lukyanenko, Maria A. Kirillova, Mikhail N. Volochaev, Anna S. Kichkailo, Rajeev Ranjan, Valentina A. Kratasyuk
Summary: The assessment of microbial contamination is crucial for ensuring food safety. A modern method for evaluating contamination is estimating ATP using firefly luciferase. This study found that gold nanoparticles stabilized with benzalkonium chloride and Triton X-100 enhanced the bioluminescent system, resulting in higher sensitivity for developing an ATP biosensor.
Article
Chemistry, Applied
Onur Bulut, M. Deniz Yilmaz
Summary: This study evaluated the catalytic activity of biocompatible chitosan-stabilized gold nanoparticles on the oxidation reaction, demonstrating high efficiency and long-term stability with low toxicity to cells. The nanoparticles showed positive correlation with concentrations of catalyst and oxidant, while negative correlation with substrate concentration. The results suggest the potential of CH-AuNPs as effective and reusable nanocatalysts for oxidation reactions.
CARBOHYDRATE POLYMERS
(2021)
Article
Chemistry, Multidisciplinary
Atul Kumar Tiwari, Hari Prakash Yadav, Munesh Kumar Gupta, Roger J. J. Narayan, Prem C. C. Pandey
Summary: A highly fluorescent, sensitive, and selective fluorometric assay for detecting Hg2+ ions was developed using vancomycin functionalized and polyethyleneimine stabilized gold nanoparticles (PEI-f-AuNPs@Van). The gold nanoparticles exhibited strong fluorescence properties with excitation and emission wavelengths of 320 nm and 418 nm, respectively. The detection limit for Hg2+ ion was determined to be 0.988 nM within a linear range, while in natural environmental samples it was 12.5 nM. The designed probe showed high selectivity for mercury (II) cations among other divalent cations.
FRONTIERS IN CHEMISTRY
(2023)
Article
Chemistry, Analytical
Mohammad Hossein Ghanbari, Zahra Norouzi, Bastian J. M. Etzold
Summary: In this study, a multinary nanocomposite was designed for the detection of theophylline (TP) and uric acid (UA) in blood serum, showing high sensitivity and selectivity. The multinary nanocomposite improved the electrochemically active surface area and electron transfer rate, leading to enhanced current response. The detection limits were found to be 0.18 nM for UA and 0.36 nM for TP, with sensitivities of 1.27 μA μM-1 cm-2 and 1.06 μA μM-1 cm-2, respectively.
MICROCHEMICAL JOURNAL
(2023)
Article
Chemistry, Physical
Lili Xu, Jinxing Chen, Qian Ma, Daiyong Chao, Xinyang Zhu, Ling Liu, Jin Wang, Youxing Fang, Shaojun Dong
Summary: Polymer stabilizers greatly influence the structure, size, and activity of gold nanoparticles (Au NPs). Among the polymers tested, polyacrylic acid-stabilized Au NPs exhibit the highest glucose oxidase-like activity due to their small size and weak spatial resistance. However, further tests reveal limitations in selectivity and activity in physiological environments.
Article
Chemistry, Analytical
Danielle Bennett, Xueqian Chen, Gregory J. Walker, Sacha Stelzer-Braid, William D. Rawlinson, D. Brynn Hibbert, Richard D. Tilley, J. Justin Gooding
Summary: Plasmonic nanoparticles in dimer format are used for single molecule sensing, where the interaction with hairpin DNA leads to a shift in localized surface plasmon resonance. Spectroscopy may detect this shift, but point-of-care devices require a faster analysis method. By using dark-field imaging and digital analysis, the plasmonic resonance shift of thousands of dimer structures can be measured in minutes. The challenge is separating dimers from non-specifically bound clusters to achieve accurate results. The LAB-based classifier algorithm demonstrated the highest accuracy for this digital separation.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Takao Noguchi, Bappaditya Roy, Daisuke Yoshihara, Junji Sakamoto, Tatsuhiro Yamamoto, Seiji Shinkai
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2016)
Article
Chemistry, Multidisciplinary
Daisuke Yoshihara, Takao Noguchi, Bappaditya Roy, Junji Sakamoto, Tatsuhiro Yamamoto, Seiji Shinkai
Article
Chemistry, Multidisciplinary
Youichi Tsuchiya, Takao Noguchi, Daisuke Yoshihara, Bappaditya Roy, Tatsuhiro Yamamoto, Seiji Shinkai
Article
Chemistry, Physical
Bappaditya Roy, Takao Noguchi, Daisuke Yoshihara, Tatsuhiro Yamamoto, Junji Sakamoto, Seiji Shinkai
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2016)
Article
Polymer Science
Junji Sakamoto, Rio Kita, Isala Duelamae, Masashi Kunitake, Megumi Hirano, Daisuke Yoshihara, Tatsuhiro Yamamoto, Takao Noguchi, Bappaditya Roy, Seiji Shinkai
Article
Chemistry, Multidisciplinary
Reza Ghanbari, Salvatore Assenza, Abhijit Saha, Raffaele Mezzenga
Article
Chemistry, Multidisciplinary
Chilakapati Madhu, Bappaditya Roy, Pandeeswar Makam, Thimmaiah Govindaraju
CHEMICAL COMMUNICATIONS
(2018)
Review
Chemistry, Multidisciplinary
Bappaditya Roy, Thimmaiah Govindaraju
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
(2019)
Article
Nanoscience & Nanotechnology
Bappaditya Roy, Satyajit Pal, Thimmaiah Govindaraju
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Chemistry, Multidisciplinary
Mouli Konar, Bappaditya Roy, Thimmaiah Govindaraju
ADVANCED MATERIALS INTERFACES
(2020)
Article
Nanoscience & Nanotechnology
Komala Pandurangan, Bappaditya Roy, Kolla Rajasekhar, Yelisetty Venkata Suseela, Prachitha Nagendra, Abhishek Chaturvedi, Upadrasta R. Satwik, N. Arul Murugan, Upadrasta Ramamurty, Thimmaiah Govindaraju
ACS APPLIED BIO MATERIALS
(2020)
Article
Chemistry, Physical
Bappaditya Roy, Takao Noguchi, Daisuke Yoshihara, Junji Sakamoto, Seiji Shinkai
Article
Chemistry, Multidisciplinary
Daisuke Yoshihara, Takao Noguchi, Bappaditya Roy, Junji Sakamoto, Tatsuhiro Yamamoto, Seiji Shinkai
CHEMISTRY-A EUROPEAN JOURNAL
(2017)
Article
Chemistry, Multidisciplinary
Takao Noguchi, Bappaditya Roy, Daisuke Yoshihara, Junji Sakamoto, Tatsuhiro Yamamoto, Seiji Shinkai
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2017)
Article
Chemistry, Multidisciplinary
Bappaditya Roy, Takao Noguchi, Daisuke Yoshihara, Junji Sakamoto, Tatsuhiro Yamamoto, Seiji Shinkai
CHEMISTRY-A EUROPEAN JOURNAL
(2017)
