@article { ISI:000333808600006, title = {Blue luminescent graphene quantum dots by photochemical stitching of small aromatic molecules: fluorescent nanoprobes in cellular imaging}, journal = {Particle \& Particle Systems Characterization }, volume = {31}, number = {4}, year = {2014}, month = {APR}, pages = {433-438}, publisher = {WILEY-V C H VERLAG GMBH}, type = {Article}, address = {BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY}, abstract = {

Blue fluorescent graphene quantum dots (GQDs) are synthesized from small haloaromatic molecules by laser photochemistry. The process involves a bottom-up photochemical stitching mechanism of the free radicals generated by irradiation of ultraviolet photons (lambda = 248 nm) on o-dichlorobenzene. The GQDs are further demonstrated to be of importance as fluorescent nanoprobes in bioimaging of cells.image

}, keywords = {bioimaging, free radicals, graphene quantum dots, photochemical stitching, UV laser}, issn = {0934-0866}, doi = {10.1002/ppsc.201300294}, author = {Gokhale, Rohan and Singh, Pooja} } @article { ISI:000360634900028, title = {Graphene quantum dots as enhanced plant growth regulators: effects on coriander and garlic plants}, journal = {Journal of the Science of Food and Agriculture}, volume = {95}, number = {13}, year = {2015}, month = {OCT}, pages = {2772-2778}, publisher = {WILEY-BLACKWELL}, address = {111 RIVER ST, HOBOKEN 07030-5774, NJ USA}, abstract = {

BACKGROUNDWe report investigations on the use of graphene quantum dots for growth enhancement in coriander (Coriandrum sativam L.) and garlic (Allium sativum) plants. The as-received seeds of coriander and garlic were treated with 0.2 mg mL(-1) of graphene quantum dots for 3 h before planting. RESULTSGraphene quantum dots enhanced the growth rate in coriander and garlic plants, including leaves, roots, shoots, flowers and fruits, when the seeds were treated with graphene quantum dots. CONCLUSIONOur investigations open up the opportunity to use graphene quantum dots as plant growth regulators that can be used in a variety of other food plants for high yield. (c) 2015 Society of Chemical Industry

}, keywords = {farming, food, graphene quantum dots, nanotechnology, plant growth regulator}, issn = {0022-5142}, doi = {10.1002/jsfa.7106}, author = {Chakravarty, Disha and Erande, Manisha B. and Late, Dattatray J.} } @article {43890, title = {Multifunctional inulin tethered silver-graphene quantum dots nanotheranostic module for pancreatic cancer therapy}, journal = {Material Science and Engineering C- Materials for Biological Application}, volume = {78}, year = {2017}, month = {SEP}, chapter = {1203-1211}, abstract = {

Cancer nanotechnology is an emerging area of cancer diagnosis and therapy. Although considerable progress has been made for targeted drug delivery systems to deliver anticancer agents to particular site of interest, new nanomaterials are frequently being developed and explored for better drug delivery efficiency. In the present work, we have explored a novel nanoformulation based on silver-graphene quantum dots (Ag-GQDs) nanocomposite for its successful implementation for pancreatic cancer specific drug delivery in wistar rats. Carboxymethyl inulin (CMI); a modified variant of natural polysaccharide inulin is tethered with the nanocomposite via carbodiimide coupling to enhance the biocompatibility of nanoformulation. Experiments are performed to investigate the cytotoxicity reduction of silver nanoparticles after inulin tethering as well as anticancer efficacy of the system using 5-Fluorouracil (5-FU) as model drug. SEM, TEM, FT-IR, UV-vis, photoluminescence and anti proliferative assays (MTT) are performed for characterisation of the nanocomposite. Hyaluronic acid (HA) is conjugated as targeting moiety for CD-44 (cancer stem cell marker) to fabricate a complete targeted drug delivery vehicle specific for pancreatic cancer. In the present work two prime objectives were achieved; mitigation the toxicity of silver nanoparticles by inulin coating and it{\textquoteright}s in vivo application for pancreatic cancer. (C) 2017 Elsevier B.V. All rights reserved.

}, keywords = {acid, Dextran, Drug-delivery, graphene quantum dots, Inulin, Nanocomposite, Nanocomposites, Nanoparticles, Pancreatic Cancer, Silver nanoparticle, Strategies, Systems, Targeted Drug Delivery}, issn = {0928-4931}, doi = {10.1016/j.msec.2017.03.176}, author = {Joshi, Preeti Nigam and Agawane, Sachin and Agawane, Sachin and Agawane, Sachin and Sarkar, Dhiman and Sarkar, Dhiman} } @article {49058, title = {Quasi-molecular hydrogen storage capacity of graphene quantum dots: A dispersion corrected DFT study}, journal = {Journal of Energy Storage}, volume = {84}, year = {2024}, month = {APR }, type = {Article}, abstract = {

Efficient storage of hydrogen, green fuel with the highest energy density, remains a pressing challenge. Among the several materials investigated for their potential hydrogen storage, 2D materials, like graphene, have advantages such as mechanical strength and large surface area but fail to store hydrogen reversibly. In this context, the present computational experiment demonstrates the potential of Graphene Quantum Dots (GQDs) with 24, 40 and 42 carbon atoms for their hydrogen storage capacity in quasi-molecular mode. Factors such as edge terminations, heteroatom doping, and anchoring of metal atoms are evaluated as a function of their storage capacity. The study clearly demonstrates an enhanced storage capacity of quantum dots, particularly, when a single Ti adatom is anchored on a 24 carbon atom GQD with a storage weight \% of 2.24 \% w/w. The storage weight \% is further noted to increase as a function of the number of Ti atoms anchored on the GQD with the highest hydrogen storage weight \% of 6.1 \% w/w. Importantly, the adsorption of hydrogen molecule on the Ti atom is through a quasi-molecular mode and is driven by Kubas interaction. This type of interactions makes GQDs as viable storage materials at room temperature. Secondly, the work demonstrates that GQDs offer higher storage capacities of hydrogen molecules as compared to their 2D counterparts viz., graphene sheets, making them attractive candidates to be explored experimentally.

}, keywords = {Density functional theory, graphene quantum dots, Hydrogen storage, Kubas interaction, Quasi -molecular adsorption, Ti adatom}, issn = {2352-152X}, doi = {10.1016/j.est.2024.110833}, author = {Khadilkar, Pranav and Samudre, Nikhil S. and Krishnamurty, Sailaja} } @article {49494, title = {Evaluating the catalytic potential of Lithium-decorated graphene quantum dots for small molecule activation}, journal = {Chemical Physics}, volume = {595}, year = {2025}, month = {JUL}, pages = {112682}, type = {Article}, abstract = {

The search for effective catalysts in small molecule activation has intensified as industries seek efficient and costeffective solutions. Lithium (Li), known for its unique electronic properties, is of significant interest as a catalyst. However, its specific catalytic potential when anchored on graphene quantum dots (GQDs) has not been fully explored. This study investigates the catalytic potential of lithium (Li) adatoms on GQDs with various edge conformations (zigzag and armchair) and sizes (24 and 42 atoms). Using density functional theory (DFT), we examine the interactions of Li-decorated GQDs with small molecules such as H2, N2, CO, O2, and CO2. Our findings reveal that Li-GQD complexes exhibit optimal catalytic activity for all these molecules, based on binding energy, charge distribution, and bond length changes. The smallest GQD, coronene (24 carbon atoms), shows the most promising catalytic activity, providing experimental leads for synthesizing and testing efficient Li-anchored catalysts.

}, keywords = {Catalytic activity, Density functional theory, graphene quantum dots, Lithium adatom, small molecule activation}, issn = {0301-0104}, doi = {10.1016/j.chemphys.2025.112682}, author = {Samudre, Nikhil S. and Tiwari, Rukminesh} }