Article
Chemistry, Analytical
Li Ruiyi, Jia Hui, Li Nana, Xu Dan, Li Zaijun
Summary: The paper describes the synthesis of gold-graphene hybrid using histidine-functionalized graphene quantum dot as the linker between gold and graphene. The hybrid exhibits good dispersion and catalytic activity. By coupling with DNA cycling signal amplification, the hybrid is able to detect chlorpyrifos in fruits with high sensitivity and selectivity.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Analytical
Nobuhle Ndebele, Pinar Sen, Tebello Nyokong
Summary: Two cobalt phthalocyanine molecules were synthesized and used as electro-catalytic probes in the electrochemical oxidation of dopamine, showing improved sensitivity and limit of detection when conjugated with nitrogen-doped graphene quantum dots.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Hui Xu, Bingji Huang, Yitao Zhao, Guangyu He, Haiqun Chen
Summary: This study successfully fabricates a doughnut-shaped Pd-Bi2Te3 catalyst, which exhibits excellent activity and durability in the electrooxidation of ethylene glycol. The catalyst's high electrocatalytic activity can accelerate charge transfer and promote the oxidation of intermediates, potentially enhancing electrochemical stability.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Liangrui Lv, Juanjuan Hu, Qingqing Chen, Mingming Xu, Chunyang Jing, Xiaoying Wang
Summary: A switchable electrochemical hairpin-aptasensor has been established for the detection of OTA in food samples. The sensor utilizes a hairpin-DNA as a signal switch and combines gold nanospheres and multiwalled carbon nanotubes to establish a support interface. Conjugated polymer-nanoparticle composites are used to label report DNA, forming a signal probe. The sensor offers a low detection limit and a wide monitoring range.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Analytical
Mugashini Vasudevan, Sathaniswarman Remesh, Veeradasan Perumal, Pandian Bothi Raja, Mohamad Nasir Mohamad Ibrahim, Subash C. B. Gopinath, Hooi-Ling Lee, Saravanan Karuppanan, Mark Ovinis, Natarajan Arumugam, Raju Suresh Kumar
Summary: A lignin-scribed graphene nanocomposite was developed for the electrochemical sensing of Troponin I. The nanocomposite exhibited high sensitivity, stability, and suitability for array-based medical diagnostics.
MICROCHEMICAL JOURNAL
(2023)
Article
Biochemical Research Methods
Shuyao Wu, Meijiao Jiang, Hui Mao, Nan Zhao, Dongqing He, Qinan Chen, Daliang Liu, Wei Zhang, Xi-Ming Song
Summary: A simple and sensitive electrochemical cholesterol biosensor based on cerasome and GQDs was developed, offering good conductivity and biocompatibility. The biosensor showed excellent catalytic performance and a low detection limit for cholesterol.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2022)
Article
Engineering, Chemical
Azam Mokhtari, Azin Yavari, Maasoumeh Khatamian, Ebrahim Sadeghi, Naeimeh Sadat Peighambardoust, Umut Aydemir
Summary: Graphene quantum dots (GQDs) were prepared and combined with ZSM-5 type cobaltosilicate and chromosilicate composites using two methods. The composites showed enhanced photocatalytic activity, especially the GQDs/chromosilicate composite. The composites could effectively degrade methylene blue under both UV and vis light irradiation. The kinetic studies revealed that the composites followed a pseudo-second-order kinetic model.
ADVANCED POWDER TECHNOLOGY
(2023)
Article
Chemistry, Analytical
Patrycja Wilczewska, Joanna Breczko, Diana M. Bobrowska, Monika Wysocka-Zolopa, Jakub Goclon, Anna Basa, Krzysztof Winkler
Summary: The influence of graphene quantum dots (GQDs) on the physicochemical properties of polypyrrole nanoparticles (PpyNPs) was investigated experimentally and theoretically. The synthesis of the non-covalent PpyNPs/ GQDs material was based on the known procedure of chemical pyrrole polymerization. The obtained hybrids were in the form of spherical polymeric particles coated with GQDs, and the morphology and porosity of the materials were influenced by the polymerization conditions. The electrode processes on the electrode modified with the PpyNPs/GQDs composite were found to be significantly different from those involving pristine PpyNPs, with faster charge transfer processes and improved electrochemical behavior observed for the composite material.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
Masoumeh Madadi, Parisa Salarizadeh, Masoud Rohani Moghadam, Alireza Bazmandegan-Shamili
Summary: Recently, there has been significant attention on designing an active electrocatalyst with a unitary structure and high performance to improve energy and storage devices. In this study, flower-like CuCo2O4 nanorods were synthesized through hydrothermal and calcination methods and hybridized with graphene quantum dots (GQDs) prepared by pyrolysis. The electrocatalysts were analyzed using various characterization techniques, and their electrochemical performance was evaluated. The GQD/CuCo2O4 showed a higher electrochemical surface area and current density for methanol oxidation than CuCo2O4, which can be attributed to the strengthening of its structure and increased electrical conductivity and specific surface area.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Ceren Karaman, Onur Karaman, Bahar Bankoglu Yola, Izzet Ulker, Necip Atar, Mehmet Lutfi Yola
Summary: In this study, a novel electrochemical AFB1 immunosensor was developed based on Ag nanocubes (AgNCs) and trigonal metallic MoS2 nanosheets with 1T phase (AgNCs/1T-MoS2) as the signal amplification and gold nanoparticles/porous graphene nanoribbon (AuNPs/PGNR) as the electrochemical sensor platform. The immunosensor exhibited good sensitivity with a low detection limit of 2.00 fg mL(-1). Physicochemical characterization techniques such as SEM, TEM, XPS, and XRD were used to describe the surface morphology and elemental composition of the immunosensor, while CV, DPV, and EIS techniques were used for evaluating its electrochemical performance.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Analytical
Li-Ping Jia, Rui-Juan Zhao, Zhe Feng, Ming-Yue Wang, Rong-Na Ma, Wen-Li Jia, Lei Shang, Wei Zhang, Qing-Wang Xue, Huai-Sheng Wang
Summary: Tumor biomarker detection is crucial for cancer early diagnosis and treatment. In this study, hollow polymeric nanospheres with high loading efficiency of ferrocene molecules were prepared, and an ultrasensitive electrochemical biosensor for circulating tumor DNA detection was developed by combining dual-enzyme assisted target amplification strategy.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Analytical
Yujie Sun, Qi Dong, Huan Yang, Weiling Song, Hong Zhou
Summary: In this study, a ratiometric electrochemical biosensor based on CuS quantum dots (CuS QDs) regulated by DNAzyme was developed for telomerase detection. Telomerase activity was measured by extending the substrate probe with repeated sequence, releasing CuS QDs as an input to the DNAzyme-modified electrode. The detection range was 1.0 x 10-12 - 1.0 x 10-6 IU/L, with a limit of detection of 2.75 x 10-14 IU/L. Telomerase activity in HeLa extracts was also tested to demonstrate its clinical application.
ANALYTICA CHIMICA ACTA
(2023)
Article
Chemistry, Physical
B. Shalini Reghunath, Sruthi Rajasekaran, K. R. Sunaja Devi, Dephan Pinheiro, U. C. Jadan Resnik Jaleel
Summary: In this study, a ternary composite consisting of cobalt ferrite, graphitic carbon nitride, and N-doped graphene quantum dots was prepared via hydrothermal technique. The purity of the samples was confirmed using various characterization methods. Electrocatalytic processes were conducted in an alkaline media to investigate the intrinsic characteristics of the obtained materials. The cobalt ferrite/graphitic carbon nitride/N-doped graphene quantum dots electrocatalyst exhibited remarkable performance with low overpotential and good stability for both hydrogen and oxygen evolution reactions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Environmental Sciences
Mohammad Mehmandoust, Pouran Pourhakkak, Gizem Tiris, Hassan Karimi-Maleh, Nevin Erk
Summary: An ultrasensitive and selective voltammetric sensor with ultra-trace level detection limit was developed for the determination of idarubicin in real samples. The synthesized nanocomposite was characterized by various techniques, and the electrocatalytic performance of the developed electrode was assessed using different electrochemical methods. The developed sensor exhibited a limit of detection of 1.0 nM for idarubicin and showed good response in the dynamic concentration range. The sensor demonstrated high selectivity with good repeatability and reproducibility for diagnosing idarubicin.
ENVIRONMENTAL RESEARCH
(2022)
Review
Engineering, Electrical & Electronic
Seyyed Mojtaba Mousavi, Gity Behbudi, Seyyed Alireza Hashemi, Aziz Babapoor, Wei-Hung Chiang, Seeram Ramakrishna, Mohammed Muzibur Rahman, Chin Wei Lai, Ahmad Gholami, Navid Omidifar, Khadije Yousefi
Summary: The study investigated the applications of advanced nanomaterials such as graphene oxide (GO), reduced graphene oxide (rGO), and graphene quantum dots (GQDs) towards treating human papillomaviruses (HPVs). Efforts have been made to develop high-performance biosensors and electrochemical detection systems for accurate HPV detection. The review discussed the different types and complications of HPVs and highlighted the importance of boosting the human immune system to effectively treat this dangerous virus.
JOURNAL OF SENSORS
(2021)