Size-Dependent Electronic Properties of Uniform Ensembles of Strongly Confined Graphene Quantum Dots

2019 ◽  
Vol 10 (5) ◽  
pp. 953-959 ◽  
Author(s):  
Zhiqiang Ji ◽  
Enkeleda Dervishi ◽  
Stephen K. Doorn ◽  
Milan Sykora
Keyword(s):  
Quantum Dots ◽  
Electronic Properties ◽  
Graphene Quantum Dots ◽  
Size Dependent

scholarly journals Electronic properties and quasi-zero-energy states of graphene quantum dots

2021 ◽  
Vol 103 (23) ◽  
Author(s):  
H. V. Grushevskaya ◽  
G. G. Krylov ◽  
S. P. Kruchinin ◽  
B. Vlahovic ◽  
Stefano Bellucci
Keyword(s):  
Quantum Dots ◽  
Electronic Properties ◽  
Graphene Quantum Dots ◽  
Zero Energy ◽  
Energy States

scholarly journals Graphene Quantum Dots as Flourishing Nanomaterials for Bio-Imaging, Therapy Development, and Micro-Supercapacitors

Micromachines ◽  
2020 ◽  
Vol 11 (9) ◽  
pp. 866
Author(s):  
Merve Kortel ◽  
Bhargav D. Mansuriya ◽  
Nicole Vargas Santana ◽  
Zeynep Altintas
Keyword(s):  
Quantum Dots ◽  
Structural Properties ◽  
Edge Effects ◽  
Quantum Confinement ◽  
Review Paper ◽  
Graphene Quantum Dots ◽  
Heteroatom Doping ◽  
Size Dependent ◽  
Bio Imaging ◽  
Therapy Development

Graphene quantum dots (GQDs) are considerably a new member of the carbon family and shine amongst other members, thanks to their superior electrochemical, optical, and structural properties as well as biocompatibility features that enable us to engage them in various bioengineering purposes. Especially, the quantum confinement and edge effects are giving GQDs their tremendous character, while their heteroatom doping attributes enable us to specifically and meritoriously tune their prospective characteristics for innumerable operations. Considering the substantial role offered by GQDs in the area of biomedicine and nanoscience, through this review paper, we primarily focus on their applications in bio-imaging, micro-supercapacitors, as well as in therapy development. The size-dependent aspects, functionalization, and particular utilization of the GQDs are discussed in detail with respect to their distinct nano-bio-technological applications.

Size-Dependent Antibacterial Behavior of Graphene Quantum Dots

2013 ◽  
Author(s):  
Siheng Su ◽  
Carla B. Shelton ◽  
Jingjing Qiu
Keyword(s):  
Quantum Dots ◽  
Surface Chemistry ◽  
Graphene Quantum Dots ◽  
Gel Filtration ◽  
Filtration Method ◽  
E Coli ◽  
Size Dependent ◽  
Mtt Method ◽  
Diphenyltetrazolium Bromide ◽  
Standard Plate

In this study, the antibacterial behavior of differing sized graphene quantum dots (GQDs) was studied. The gram negative bacteria, Escherichia coli (E. coli), were used as the bacteria mode. Different sized GQDs with tunable fluorescent colors were acquired by a gel-filtration method. The size, surface chemistry, and photoluminescence properties of GQDs were characterized, respectively. The viability of GQDs treated bacteria was determined by the standard plate counting method. Moreover, the reactive oxidative species (ROS) level was detected by the 3-(4,5-Dimethylthiazol-2-yl)-2,5-Diphenyltetrazolium Bromide (MTT) method. The integrality of the bacteria membrane was observed under the scanning electron microscopy (SEM). The experimental results indicated that GQDs demonstrated size-dependent and surface chemistry-dependent antibacterial behaviors. This research provided insightful guidelines in the selection of suitable GQDs for their potential bioapplications.

Size-Dependent Structural and Optical Characteristics of Glucose-Derived Graphene Quantum Dots

2013 ◽  
Vol 30 (6) ◽  
pp. 523-531 ◽  
Author(s):  
Libin Tang ◽  
Rongbin Ji ◽  
Xueming Li ◽  
Kar Seng Teng ◽  
Shu Ping Lau
Keyword(s):  
Quantum Dots ◽  
Graphene Quantum Dots ◽  
Optical Characteristics ◽  
Size Dependent

Can inorganic salts tune electronic properties of graphene quantum dots?

2015 ◽  
Vol 17 (26) ◽  
pp. 17413-17420 ◽  
Author(s):  
Guilherme Colherinhas ◽  
Eudes Eterno Fileti ◽  
Vitaly V. Chaban
Keyword(s):  
Density Functional Theory ◽  
Quantum Dots ◽  
Band Gap ◽  
Electronic Properties ◽  
Density Functional ◽  
Graphene Quantum Dots ◽  
Inorganic Salts ◽  
Ionic Clusters ◽  
Functional Theory ◽  
Free Ions

In this work, we apply density functional theory to study the effect of neutral ionic clusters adsorbed on the GQD surface. We conclude that both the HOMO and the LUMO of GQDs are very sensitive to the presence of ions and to their distance from the GQD surface. However, the alteration of the band gap itself is modest, as opposed to the case of free ions (recent reports). Our work fosters progress in modulating electronic properties of nanoscale carbonaceous materials.

Size-dependent radiative decay processes in graphene quantum dots

2012 ◽  
Vol 101 (16) ◽  
pp. 163103 ◽  
Author(s):  
Sung Kim ◽  
Dong Hee Shin ◽  
Chang Oh Kim ◽  
Soo Seok Kang ◽  
Jong Min Kim ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Radiative Decay ◽  
Graphene Quantum Dots ◽  
Size Dependent

scholarly journals Size-dependent two-photon absorption in circular graphene quantum dots

2016 ◽  
Vol 24 (3) ◽  
pp. 2877 ◽  
Author(s):  
Xiaobo Feng ◽  
Xin Li ◽  
Zhisong Li ◽  
Yingkai Liu
Keyword(s):  
Quantum Dots ◽  
Graphene Quantum Dots ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Size Dependent ◽  
Two Photon
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