C96H30tailored single-layer and single-crystalline graphene quantum dots

2016 ◽  
Vol 18 (36) ◽  
pp. 25002-25009 ◽  
Author(s):  
Biao Yuan ◽  
Xingming Sun ◽  
Jun Yan ◽  
Zheng Xie ◽  
Ping Chen ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Graphene Quantum Dots ◽  
Single Layer ◽  
Dependent Effect ◽  
Single Crystalline ◽  
Size Dependent

C96H30can be the precursor of single-layer and single-crystalline graphene quantum dots with a size-dependent effect.

Single-Layered and Single-Crystalline Graphene Quantum Dots from 2D Polycyclic Compounds

2016 ◽  
Vol 33 (11) ◽  
pp. 811-817 ◽  
Author(s):  
Biao Yuan ◽  
Zheng Xie ◽  
Xingming Sun ◽  
Jun Yan ◽  
Ping Chen ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Graphene Quantum Dots ◽  
Polycyclic Compounds ◽  
Single Crystalline

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.

The Cytotoxicity of Quantum Dots CdSe/CdS functionalized with -COOH and –NH2

2009 ◽  
Vol 1220 ◽  
Author(s):  
Lin-Jing Shen ◽  
Jing Cui ◽  
Jin-Hua Liu ◽  
Xiao-Bo Xu ◽  
Ming-Qiang Zhu
Keyword(s):  
Quantum Dots ◽  
Fluorescent Dyes ◽  
Semiconductor Nanocrystals ◽  
Assay Method ◽  
Dependent Effect ◽  
Lower Toxicity ◽  
Size Dependent ◽  
Dose Dependent ◽  
Dose Dependent Effect ◽  
Mtt Assays

AbstractRecently, semiconductor nanocrystals or quantum dots (QDs) aroused great concern because of their unique properties such as the size-dependent photoluminescence. They have many excellent applications in areas of molecular bioimaging, medical detection and even energy, especially as biosensing and imaging instead of fluorescent dyes. For the bio-safety, however, we should assess the cytotoxicity of QDs before used in biomedical imaging. Here, the cytotoxicity of amino-functionalized CdSe/CdS (CdSe/CdS-NH2) QDs and carboxy-functionalized CdSe/CdS (CdSe/CdS-COOH) QDs was investigated by MTT assay method. According to our findings, both CdSe/CdS-NH2 and CdSe/CdS-COOH have a dose-dependent effect on cell proliferation. The cytotoxicity of QDs varies with storing time of QDs and kinds of cells. The cytotoxicity of QDs modified with -COOH or -NH2 groups both vary with concentrations in positive linear or change with QD storing time in negative linear. The results indicate that CdSe/CdS-COOH QDs have lower toxicity than CdSe/CdS-NH2 QDs. Hela cell is somewhat more sensitive to amino- and carboxy-modified QDs than Bel7404 cell for MTT assays.

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

scholarly journals Anodic Electrochemiluminescence of CdTe Quantum Dots Using Tripropylamine as Coreactant: Size-dependent Effect

2020 ◽  
Vol 36 (7) ◽  
pp. 859-863
Author(s):  
Masayuki NAKAYAMA ◽  
Takuma KITANO ◽  
Jianshan YE ◽  
Jiye JIN
Keyword(s):  
Quantum Dots ◽  
Cdte Quantum Dots ◽  
Dependent Effect ◽  
Size Dependent
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