Article
Environmental Sciences
Mohammad Ehtisham Khan, Akbar Mohammad, Taeho Yoon
Summary: This review validates the importance of CQDs in multiple research fields, summarizes their extensive photonic and electronic properties, and highlights the significant advantages in visible-light-induced catalytic applications. The article also examines the problems and future directions in this research field and presents the decisive role of CQDs in photocatalysis, bio-imaging, and bio-sensing applications.
Review
Chemistry, Multidisciplinary
Yu Cheng, Si Da Ling, Yuhao Geng, Yundong Wang, Jianhong Xu
Summary: Microfluidic technology offers a controllable and efficient method for producing high-quality quantum dots, which can be used for bio-sensing and bio-imaging applications. It also serves as an effective platform to understand the synthetic mechanism and optimize reaction parameters for quantum dot production.
NANOSCALE ADVANCES
(2021)
Article
Materials Science, Multidisciplinary
Naixin Li, Fang Lei, Dandan Xu, Yong Li, Jinliang Liu, Ying Shi
Summary: In this study, nitrogen and phosphorus co-doped carbon dots were prepared using a solvothermal synthesis strategy, resulting in improved electronic properties and tunable luminescence. The prepared carbon dots showed excitation-dependent emission in the blue region and excitation-independent emission in the orange region, with a high quantum yield of 47%. The N, P-CDs were found to be non-toxic to cells and suitable for cell imaging applications, suggesting their potential as excellent bioimaging probes.
Article
Chemistry, Physical
Kasirajan Kasinathan, Selvam Samayanan, Karunakaran Marimuthu, Jin-Heong Yim
Summary: Initial identification is crucial for predicting life-threatening diseases. Researchers have shown interest in natural carbon quantum dots (NCQDs) due to their potential applications in biomedicine. This study discusses the eco-friendly and cost-effective synthesis of fluorescent carbon quantum dots (CQDs) using sugarcane baggage as a carbon source. The synthesized CQDs demonstrate good biocompatibility and low cytotoxicity, making them an efficient fluorescent probe for multicolour live-cell imaging.
APPLIED SURFACE SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Jie Li, Guobin Xu, YingMin Lu, Xuan Xia, Wenqi Song, Qi Wang, Chao Liu
Summary: In this study, blue, green, and red water-dispersible carbon dots (CDs) with trichromatic properties were prepared and analyzed for their morphological characteristics and optical properties. The results showed that adjustable fluorescent colors and white emission could be achieved by adjusting the mixing ratio of CDs, and multicolor polyvinyl alcohol fluorescent films were synthesized using CDs as pigments.
ACS APPLIED NANO MATERIALS
(2023)
Article
Spectroscopy
Jiaying Yan, Yuhang Zhou, Jialu Shen, Nuonuo Zhang, Xiang Liu
Summary: By hydrothermal reaction, two highly fluorescent N and S co-doped carbon dots (N, S-CDs-A and N, S-CDs-B) were synthesized using reactive red 2 (RR2) and L-cysteine or L-methionine. The synthesized carbon dots showed maximum fluorescence at 565 nm and 615 nm with moderate intensity. The doping of S and N was found to be beneficial for the red-shift of fluorescence spectra. The carbon dots exhibited high sensitivity and selectivity towards Fe3+ and Al3+ ions, and one of them was successfully used for cell imaging.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Engineering, Chemical
Liangliang Lin, Yuan Xia, Hongyu Wen, Wentong Lu, Ziyang Li, Hujun Xu, Juan Zhou
Summary: In this work, a simple, continuous and environmentally friendly method based on microflow technique was used to synthesize carbon quantum dots (CQDs) from various bio-based precursors. The synthesis feasibility was demonstrated by preparing CQDs from milk. The optical properties, bandgap energy, and fluorescence lifetime of the CQDs were found to be closely related to the synthesis temperature. The CQDs showed high biocompatibility, could penetrate cell membranes, and exhibited bright fluorescence. The versatility of the method was further confirmed by synthesizing CQDs from watermelon juice, orange juice, and soy milk.
Article
Environmental Sciences
Natarajan Architha, Murugesan Ragupathi, Chellappan Shobana, Thangasamy Selvankumar, Ponnuchamy Kumar, Yun Sung Lee, Ramakrishnan Kalai Selvan
Summary: Biomass-derived carbon quantum dots synthesized from Mexican Mint leaves via microwave-assisted reflux method exhibited strong fluorescence properties and high sensitivity to Fe3+ ions, allowing for the construction of logic gates and effective application in cell imaging.
ENVIRONMENTAL RESEARCH
(2021)
Article
Chemistry, Analytical
Xingyan Huo, Lizhen Liu, Yunfeng Bai, Jun Qin, Lin Yuan, Feng Feng
Summary: A novel fluorescent probe based on CQDs for phoxim detection was developed, showing good sensitivity, selectivity, and recoveries. The method has significant potential applications in the biological field.
ANALYTICA CHIMICA ACTA
(2022)
Article
Biotechnology & Applied Microbiology
Seokhwan Chung, Miqin Zhang
Summary: The study presents a novel iron oxide and carbon dot based nanoparticle (CNPCP) with optical properties similar to traditional fluorescent probes and good biocompatibility. In vitro evaluation in cancer cell lines showed these nanoparticles to be non-toxic and effective for imaging. Additionally, conjugation of model therapeutic doxorubicin onto the NPs demonstrated their potential for delivering chemotherapeutics in a dose-dependent manner.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2021)
Review
Electrochemistry
Daniele Rocco, Vyali Georgian Moldoveanu, Marta Feroci, Martina Bortolami, Fabrizio Vetica
Summary: Carbon quantum dots (CDs) are small carbon nanostructures that exhibit excellent photoluminescence properties and have low toxicity, high biocompatibility, and good dispersibility in water and organic solvents. They have been extensively investigated for various applications such as biosensors, luminescent probes, and fluorescent inks. The synthesis of high-quality CDs via electrochemistry has been shown to be a green, practical, and efficient approach, with the ability to fine-tune their characteristics. This review summarizes the recent advances in electrochemical synthesis of CDs, with a focus on optimizing the electrochemical set-up.
Article
Chemistry, Applied
Xiuling Ji, Suping Wang, Yiyong Luo, Xiaotian Yuan, Yunlin Wei, Qi Zhang, Kunhao Qin, Yujiao Tu
Summary: Fluorescent carbon dots (CDs) derived from Weissella sp. Kl-3, known as CDs-Ws, exhibit strong fluorescence, excellent biocompatibility, and low cytotoxicity. CDs-Ws can selectively label and differentiate cells, as well as function as a fluorescence nanosensor for detecting Cr(VI) and VB12 with high sensitivity and detection limits. The CDs-Ws show great potential in bioimaging and detection of specific substances.
Article
Biochemical Research Methods
Zhao Xu, Cong Zhang, Xu Yu, Heng Zheng, Li Xu
Summary: The microwave-assisted solid-phase synthesis method was employed to produce nitrogen-doping carbon dots (N-CDs) with high fluorescence quantum yield and stability, which were used for the detection of sunitinib. Combining proper sample pretreatment and N-CD probe, fluorescence detection of sunitinib was achieved.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2021)
Review
Chemistry, Multidisciplinary
Giorgio Speranza
Summary: Recent advances in nanomaterial design and synthesis have led to the development of robust sensing systems with superior analytical performance. Carbon-based sensors, known for their biocompatibility, sensitivity, selectivity, and low limits of detection, have been widely used for the detection of organic and inorganic molecules. Carbon nanomaterials, such as fullerenes, carbon onions, carbon quantum dots, nanodiamonds, carbon nanotubes, and graphene, have unique properties that make them ideal for sensing applications, showing promise for future developments.
Article
Chemistry, Multidisciplinary
Puja Kumari, Ravi Pratap, Veer S. Gautam, Megha Das, Nurul Hassan, Jayeeta Lahiri, Archana Mishra, Sanjeev K. Yadav, Ravindra N. Kharwar, Avanish S. Parmar
Summary: In this study, a simple and environmentally friendly hydrothermal treatment method was used to prepare carbon nanodots (CND) from fungal biomass. The optical and structural characteristics of the CND were thoroughly investigated, and they were found to be a fluorescence probe for the sensitive detection of food adulterants. The biocompatibility and bio-imaging features of CND were assessed using human embryonic kidney 293 (HEK 293) cell lines.
Article
Environmental Sciences
J. Vinoth Kumar, G. Kavitha, Gadah Albasher, Maryium Sajjad, R. Arulmozhi, M. Komal, M. Sherlin Nivetha, N. Abirami
Summary: In this study, multiplex heteroatoms doped carbon dots were synthesized from Tinospora cordifolia miers plant extract using a simple hydrothermal approach. Their catalytic activity towards dyes and potential applications for anti-spurious purposes were evaluated. The synthesized carbon dots exhibited tunable fluorescence and high quantum yield, suggesting their potential as catalysts and security labels.
Article
Energy & Fuels
Suresh Pavithra, Vinoth Kumar Jothi, Arulmozhi Rajaram, Sagar Ingavale, Abirami Natarajan
Summary: A bimetallic metal-organic framework (MOF) codoped with carbon nanodots (CNDs) was synthesized via solvothermal treatment. The composite material exhibited efficient oxygen evolution reaction (OER) electrocatalytic activity.
Article
Materials Science, Ceramics
S. Sankeetha, R. Muralidharan, N. Abirami, H. Leelavathi, S. Tamizharasan, A. Kumarasamy, R. Arulmozhi
Summary: The objective of this research is to synthesize novel Ni-BaTiO3/h-BN nanocomposites and analyze their properties using various techniques. The synthesized nanocomposites have an average particle size of 32 nm and a band gap of 2.43 eV. Photocatalytic treatment using Ni-BaTiO3/h-BN catalyst showed high degradation efficiency for textile effluent and crystal violet dye under visible light. The toxicity of the degraded textile effluent was reduced after photocatalytic treatment. The scavenger study revealed that holes (h+) played a major role in the degradation process. The Ni-BaTiO3/h-BN nanocatalyst proved to be effective and low-cost for degrading textile dye wastewater.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Inorganic & Nuclear
G. Kavitha, J. Vinoth Kumar, R. Arulmozhi, N. Abirami
Summary: By utilizing Baccaurea motleyana leaf extract, silver nanoparticles were successfully synthesized and anchored onto activated carbon to form a nanocomposite with enhanced stability and cytotoxic effects against breast carcinoma cells. The fabricated hybrid material showed improved properties for cancer therapeutics, indicating a promising strategy for anti-breast cancer treatments.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Harikrishnan Leelavathi, Rajaram Muralidharan, Natarajan Abirami, Selvakumar Tamizharasan, Sasikumar Sankeetha, Alwar Kumarasamy, Rajaram Arulmozhi
Summary: This study presents the utilization of ternary g-C3N4/Co/ZnO heterojunction photocatalyst for dye degradation. g-C3N4/Co/ZnO nanocomposite was synthesized using a simple ultrasonic and sol-gel method. The physico-chemical characteristics were analyzed to determine the structural properties and the efficiency of photogenerated electron-holes. The S-scheme g-C3N4/Co/ZnO photocatalyst showed high efficiency in the degradation of cationic dyes under visible light irradiation. The presence of metallic Cobalt nanoparticles enhanced the electron transport and the responsiveness of the photocatalyst to sunlight.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Engineering, Electrical & Electronic
Tamizharasan Selvakumar, Muralidharan Rajaram, Abirami Natarajan, Leelavathi Harikrishnan, Sankeetha Sasikumar, Kumarasamy Alwar, Arulmozhi Rajaram
Summary: In this study, nitrogen-doped graphene quantum dots (N-GQDs)@MnCo2O4 nanocomposite was prepared and its physicochemical characteristics were determined. N-GQDs were found to have a significant effect on the bandgap and photocatalytic activity of MnCo2O4. The prepared nanocomposites showed excellent performance in the photodegradation of organic dye pollutants, exhibiting high stability and efficiency.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Agronomy
Velusamy Arul, Kothalam Radhakrishnan, Natarajan Sampathkumar, Jothi Vinoth Kumar, Natarajan Abirami, Baskaran Stephen Inbaraj
Summary: Nitrogen- and oxygen-doped fluorescent carbon dots (NOFCDs) were prepared using a hydrothermal carbonization technique with aqueous ammonia and Garcinia mangostana plant extract as nitrogen and carbon sources, respectively. The synthesized NOFCDs were characterized using various microscopic and spectroscopic techniques. The study revealed that NOFCDs exhibited excitation-dependent fluorescent emission and absorption with the strongest emission peak at 405 nm when excited at 320 nm. The NOFCDs were spherical in shape with a particle size of 3.58 nm. The presence of nitrogen and oxygen doping on the NOFCDs' surface was confirmed through XPS, FTIR, and EDS investigations. Additionally, the NOFCDs showed excellent catalytic activity in the detoxification of methylene blue when treated with NaBH4. Overall, this research highlighted the potential of green-synthesized NOFCDs for catalytic and environmental remediation applications.
Article
Materials Science, Multidisciplinary
Velusamy Arul, Pitchai Chandrasekaran, Gandhi Sivaraman, Mathur Gopalakrishnan Sethuraman
Summary: The proficient carbon nanocatalysts and incredible fluorescent bio-imaging probes were successfully fabricated and compared for their remarkable efficiencies in this work. The undoped and heteroatoms (N, B & S) doped carbon dots were prepared from Syzygium malaccense (S. malaccense) fruit extract using a simple and low-cost hydrothermal carbonization method. Various analytical techniques were used to characterize and confirm the obtained pure and heteroatoms doped CDs. The N-CDs showed better catalytic ability and efficient reduction of methylene blue (MB) within 10 minutes, and the N-CDs also exhibited higher intensity for in-vitro multicolour HeLa cell imaging compared to other synthesized CDs.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Chemistry, Analytical
Velusamy Arul, Natarajan Sampathkumar, Sindhuja Kotteeswaran, Ponnusamy Arul, Ahmed Muteb Aljuwayid, Mohamed A. Habila, Mani Govindasamy
Summary: Binder-free and efficient electrochemical sensing of levofloxacin was achieved using nitrogen-doped carbon nanodots (NCNDs) synthesized via hydrothermal carbonation. The NCNDs showed uniform spherical morphology (2.96 nm diameter) and high quantum yield efficiency (0.42 Phi). The NCNDs-modified electrode exhibited enhanced current response, lower detection potential, and improved electron transfer reaction. The optimized NCNDs/GCE sensor showed a wide linear range (200 nM to 2.8 mM) and low detection limit (48.26 nM) with excellent stability and reproducibility. The NCNDs-modified GC electrode was successfully applied to quantify the concentration of LF in drug and river water samples with satisfactory recovery percentages (96.60-99.20% and 97.20-99.00%, respectively).
Article
Materials Science, Ceramics
S. Sankeetha, R. Muralidharan, N. Abirami, R. Arulmozhi
Summary: The primary objective of this research was to synthesize FeVO4/h-BN nano-composite with a smaller bandgap than h-BN using the sol-gel method. Various techniques were used to evaluate the structure, optical activity, vibrational properties, chemical compositions, and electro-chemical studies of the nanocomposite. The FeVO4/h-BN binary nanocomposite effectively degraded industrial wastewater and dyes under visible light, with significant reduction in toxicity. The study also investigated the recycling potential of the material.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
M. Komal, J. Vinoth Kumar, R. Arulmozhi, M. Sherlin Nivetha, S. Pavithra, N. Abirami
Summary: To detect BPA, a environmentally friendly molecularly imprinted polymer was synthesized and incorporated onto graphitic carbon nitride. The hybrid material showed peroxidase-like activity and had good detection performance for BPA.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Jothi Vinoth Kumar, Velusamy Arul, Rajaram Arulmozhi, Natarajan Abirami
Summary: This work discusses the synthesis, morphology, and catalytic properties of undoped and boron-doped carbon nanodots (BDCNDs) using Tribulus terrestris as the carbon precursor and boric acid as the boron source. The results show that the synthesized BDCNDs have a spherical shape and blue fluorescence, and exhibit high catalytic activity in reducing organic dyes. Additionally, a novel anti-counterfeiting system combining fluorescent security labels and quick response technology is proposed.
NEW JOURNAL OF CHEMISTRY
(2022)
