Results 221 to 230 of about 19,559 (260)

Graphene quantum dots, graphene oxide, carbon quantum dots and graphite nanocrystals in coals

Nanoscale, 2014
Six coal samples of different ranks were revealed to contain large amounts of graphene quantum dots, graphene oxide, carbon quantum dots, agglomerated GQDs and agglomerated carbon nanocrystals.
Yongqiang, Dong, Jianpeng, Lin, Yingmei, Chen, Fengfu, Fu, Yuwu, Chi, Guonan, Chen   +5 more
openaire   +2 more sources

Graphene Quantum Dots for Optical Bioimaging

Small, 2019
AbstractGraphene quantum dots (GQDs) have shown great potential in bioimaging applications due to their excellent biocompatibility, low cytotoxicity, feasibility for surface functionalization, physiological stability, and tunable fluorescence properties.
Huiting Lu, Wenjun Li, Haifeng Dong, Menglian Wei   +3 more
openaire   +2 more sources

Biological Evaluation of Graphene Quantum Dots and Nitrogen-Doped Graphene Quantum Dots as Neurotrophic Agents

ACS Applied Bio Materials, 2023
Over time, developments in nano-biomedical research have led to the creation of a number of systems to cure serious illnesses. Tandem use of nano-theragnostics such as diagnostic and therapeutic approaches tailored to the individual disease treatment is crucial for further development in the field of biomedical advancements.
Akshaya Raghavan, Mydhili Radhakrishnan, Kalyani Soren, Pratishtha Wadnerkar, Arvind Kumar, Sumana Chakravarty, Sutapa Ghosh   +6 more
openaire   +2 more sources

Graphene Quantum Dots

2014
Single particle properties of graphene quantum dots.- Electron-electron interaction in gated graphene nanostructures.- Magnetic properties of gated graphene nanostructures.- Optical properties of graphene nanostructures.
Alev Devrim Güçlü, Pawel Potasz, Marek Korkusinski, Pawel Hawrylak   +3 more
openaire   +1 more source

Solution‐Processable Graphene Quantum Dots

ChemPhysChem, 2013
AbstractThis minireview describes recent progress in solution‐processable graphene quantum dots (SGQDs). Advances in the preparation, modification, properties, and applications of SGQDs are highlighted in detail. As one of emerging nanostructured materials, possible ongoing research related to the precise control of the lateral size, edge structure and
Xuejiao, Zhou, Shouwu, Guo, Jingyan, Zhang   +2 more
openaire   +2 more sources

Transmission and scarring in graphene quantum dots

Journal of Physics: Condensed Matter, 2009
We study electronic transport in quantum-dot structures made of graphene. Focusing on the rectangular dot geometry and utilizing the non-equilibrium Green's function to calculate the transmission in the tight-binding framework, we find significant fluctuations in the transmission as a function of the electron energy.
Liang, Huang, Ying-Cheng, Lai, David K, Ferry, Richard, Akis, Stephen M, Goodnick   +4 more
openaire   +2 more sources

Functional microspheres of graphene quantum dots

Nanotechnology, 2012
Graphene-quantum-dot microspheres (GQDSs) have been prepared by assembly of graphene quantum dots (GQDs) via a water-in-oil (W/O) emulsion technique without the addition of any surfactants. Although made of quantum-sized graphene dots, the as-formed GQDSs are solid and remain intact after slight ultrasonication. The versatile W/O emulsion method allows
Yi, Ding, Huhu, Cheng, Ce, Zhou, Yueqiong, Fan, Jia, Zhu, Huibo, Shao, Liangti, Qu   +6 more
openaire   +2 more sources

Polymorphic Architectures of Graphene Quantum Dots

Advanced Materials, 2017
A systematic strategy for designing structured nanomaterials is demonstrated through self‐assembly of graphene quantum dots. The approach reveals that graphene derivatives at the nanoscale assemble into various architectures of nanocrystals in a binary solution system.
Sejung, Kim, Youngjun, Song, Michael J, Heller   +2 more
openaire   +2 more sources

Graphene Quantum Dots for Theranostics and Bioimaging

Pharmaceutical Research, 2016
Since their advent in the early 1990s, nanomaterials hold promise to constitute improved technologies in the biomedical area. In particular, graphene quantum dots (GQDs) were conjectured to produce new or improve current methods used for bioimaging, drug delivery, and biomarker sensors for early detection of diseases.
Kathryn L, Schroeder, Renee V, Goreham, Thomas, Nann   +2 more
openaire   +2 more sources

Quantum confinement in graphene quantum dots

physica status solidi (RRL) – Rapid Research Letters, 2014
AbstractBy performing density functional theory calculations, we studied the quantum confinement in charged graphene quantum dots (GQDs), which is found to be clearly edge and shape dependent. It is found that the excess charges have a large distribution at the edges of the GQD.
Zhongkai Huang, Jinfeng Qu, Xiangyang Peng, Wenliang Liu, Kaiwang Zhang, Xiaolin Wei, Jianxin Zhong   +6 more
openaire   +1 more source