Self-Assembly of Monodisperse Carbon Dots into High-Brightness Nanoaggregates for Cellular Uptake Imaging and Iron(III) Sensing

2017 ◽  
Vol 89 (21) ◽  
pp. 11348-11356 ◽  
Author(s):  
Tzu-Heng Chen ◽  
Wei-Lung Tseng
Keyword(s):  
Cellular Uptake ◽  
Self Assembly ◽  
Carbon Dots ◽  
High Brightness

Carbon Dots for Bacterial Detection and Antibacterial Applications-A Minireview

2020 ◽  
Vol 25 (46) ◽  
pp. 4848-4860 ◽  
Author(s):  
Anisha Anand ◽  
Gopinathan Manavalan ◽  
Ranju Prasad Mandal ◽  
Huan-Tsung Chang ◽  
Yi-Ru Chiou ◽  
...  
Keyword(s):  
Optical Properties ◽  
Carbon Dots ◽  
Antibacterial Effect ◽  
Bacterial Detection ◽  
High Brightness ◽  
Photo Catalysis ◽  
Wide Range ◽  
Prevention And Treatment ◽  
Low Toxicity ◽  
Conventional Antibiotics

: The prevention and treatment of various infections caused by microbes through antibiotics are becoming less effective due to antimicrobial resistance. Researches are focused on antimicrobial nanomaterials to inhibit bacterial growth and destroy the cells, to replace conventional antibiotics. Recently, carbon dots (C-Dots) become attractive candidates for a wide range of applications, including the detection and treatment of pathogens. In addition to low toxicity, ease of synthesis and functionalization, and high biocompatibility, C-Dots show excellent optical properties such as multi-emission, high brightness, and photostability. C-Dots have shown great potential in various fields, such as biosensing, nanomedicine, photo-catalysis, and bioimaging. This review focuses on the origin and synthesis of various C-Dots with special emphasis on bacterial detection, the antibacterial effect of CDots, and their mechanism.

scholarly journals Synthesis of aminated polystyrene and its self-assembly with nanoparticles at oil/water interface

e-Polymers ◽  
2020 ◽  
Vol 20 (1) ◽  
pp. 317-327
Author(s):  
Chenliang Shi ◽  
Ling Lin ◽  
Yukun Yang ◽  
Wenjia Luo ◽  
Maoqing Deng ◽  
...  
Keyword(s):  
Interfacial Tension ◽  
Self Assembly ◽  
Carbon Dots ◽  
Chain Transfer ◽  
Functionalized Polymers ◽  
Amino Groups ◽  
One Dimensional ◽  
Reversible Addition ◽  
Oil Water ◽  
Chain Transfer Polymerization

AbstractThe influence of density of amino groups, nanoparticles dimension and pH on the interaction between end-functionalized polymers and nanoparticles was extensively investigated in this study. PS–NH2 and H2N–PS–NH2 were prepared using reversible addition–fragmentation chain transfer polymerization and atom transfer radical polymerization. Zero-dimensional carbon dots with sulfonate groups, one-dimensional cellulose nanocrystals with sulfate groups and two-dimensional graphene with sulfonate groups in the aqueous phase were added into the toluene phase containing the aminated PS. The results indicate that aminated PS exhibited the strongest interfacial activity after compounding with sulfonated nanoparticles at a pH of 3. PS ended with two amino groups performed better in reducing the water/toluene interfacial tension than PS ended with only one amino group. The dimension of sulfonated nanoparticles also contributed significantly to the reduction in the water/toluene interfacial tension. The minimal interfacial tension was 4.49 mN/m after compounding PS–NH2 with sulfonated zero-dimensional carbon dots.

scholarly journals Manuscript-C-dots assembly at interface-041020.pdf

2020 ◽  
Author(s):  
Amin Reza Zolghadr ◽  
Behnam Rostami
Keyword(s):  
Self Assembly ◽  
Carbon Dots ◽  
Sodium Dodecyl ◽  
Surface Region ◽  
Systematic Investigation ◽  
Dynamics Simulation ◽  
Surface Tension Gradient ◽  
Bivariate Analysis ◽  
Air Interface ◽  
Sds Surfactant

We describe a systematic investigation of carbon dots (C-dots) assemblies fabricated at the liquid/air interface because of the surface tension gradient. This gradient is originally created by capillary action and increased by addition of sodium dodecyl sulfate (SDS) surfactant or 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC) phospholipid to the surface of C-dots aqueous mixture. The arrangement of carbon dots in liquid bulk phase (before self-assembly) and at the surface region (after self-assembly) was examined by TEM microscopy. The presence of SDS surfactant and POPC phospholipid at the air/water interface induced the C-dots compression. In addition, molecular dynamics simulation was conducted to obtain the structure of C-dots at liquid/vapor interface. The orientation of C-dots is evaluated quantitatively at water/vapor surface by using bivariate analysis.

Lattice-matched carbon dots induced the oriented self-assembly of Cu nanoparticles

Carbon ◽  
2017 ◽  
Vol 118 ◽  
pp. 625-633 ◽  
Author(s):  
Piao-Yang Cao ◽  
Yong-Lin Liu ◽  
Zuan-Tao Lin ◽  
Jian-Fei Huang ◽  
Wen-Zhao Chen ◽  
...  
Keyword(s):  
Self Assembly ◽  
Carbon Dots ◽  
Cu Nanoparticles ◽  
Lattice Matched

Self-assembly of g-C3N4-based 3D aerogel induced by N-modified carbon dots for enhanced photocatalytic hydrogen production

2021 ◽  
Author(s):  
Pu Xiao-Long ◽  
yang xuechun ◽  
Shan-Shan Liang ◽  
Wenzhong Wang ◽  
Jing-Tai Zhao ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Self Assembly ◽  
Carbon Dots ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Cross Linking ◽  
Photocatalytic Hydrogen Production

The N-modified carbon dots/graphitic carbon nitride (NCDs/g-C3N4) aerogel was successfully prepared by simple electrostatic self-assembly of NCDs and g-C3N4 nanosheets without any harmful solvents or cross-linking agents. The prepared aerogel...

scholarly journals Effect of the Hydrophilic-Hydrophobic Balance of Antigen-Loaded Peptide Nanofibers on Their Cellular Uptake, Cellular Toxicity, and Immune Stimulatory Properties

2019 ◽  
Vol 20 (15) ◽  
pp. 3781 ◽  
Author(s):  
Tomonori Waku ◽  
Saki Nishigaki ◽  
Yuichi Kitagawa ◽  
Sayaka Koeda ◽  
Kazufumi Kawabata ◽  
...  
Keyword(s):  
Cellular Uptake ◽  
Self Assembly ◽  
Sheet Forming ◽  
Design Guidelines ◽  
Cellular Interactions ◽  
Antigenic Peptides ◽  
Peptide Nanofibers ◽  
Dc Line ◽  
Chain Lengths ◽  
Β Sheet

Recently, nanofibers (NFs) formed from antigenic peptides conjugated to β-sheet-forming peptides have attracted much attention as a new generation of vaccines. However, studies describing how the hydrophilic-hydrophobic balance of NF components affects cellular interactions of NFs are limited. In this report, three different NFs were prepared by self-assembly of β-sheet-forming peptides conjugated with model antigenic peptides (SIINFEKL) from ovalbumin and hydrophilic oligo-ethylene glycol (EG) of differing chain lengths (6-, 12- and 24-mer) to investigate the effect of EG length of antigen-loaded NFs on their cellular uptake, cytotoxicity, and dendritic cell (DC)-stimulation ability. We used an immortal DC line, termed JAWS II, derived from bone marrow-derived DCs of a C57BL/6 p53-knockout mouse. The uptake of NFs, consisting of the EG 12-mer by DCs, was the most effective and activated DC without exhibiting significant cytotoxicity. Increasing the EG chain length significantly reduced cellular entry and DC activation by NFs. Conversely, shortening the EG chain enhanced DC activation but increased toxicity and impaired water-dispersibility, resulting in low cellular uptake. These results show that the interaction of antigen-loaded NFs with cells can be tuned by the EG length, which provides useful design guidelines for the development of effective NF-based vaccines.

Methotrexate anchored carbon dots as theranostic probes: digitonin conjugation enhances cellular uptake and cytotoxicity

RSC Advances ◽  
2016 ◽  
Vol 6 (61) ◽  
pp. 56313-56318 ◽  
Author(s):  
A. Shanti Krishna ◽  
C. Radhakumary ◽  
S. S. Priya ◽  
Rekha M. Ramesan ◽  
K. Sreenivasan
Keyword(s):  
Cellular Uptake ◽  
Carbon Dots

Digitonin conjugation significantly improves the theranostic potential of methotrexate amended carbon dots.

Monocomponent hexa- and dodecaethylene glycol succinyl-tocopherol esters: Self-assembly structures, cellular uptake and sensitivity to enzyme hydrolysis

2009 ◽  
Vol 78 (12) ◽  
pp. 1464-1474 ◽  
Author(s):  
Britta M. Folmer ◽  
Denis Barron ◽  
Eric Hughes ◽  
Laurence Miguet ◽  
Belén Sanchez ◽  
...  
Keyword(s):  
Cellular Uptake ◽  
Self Assembly ◽  
Enzyme Hydrolysis ◽  
Dodecaethylene Glycol

Facile formation of chiral nanofibers with excellent electrochemical performance via self-assembly of carbon dots and cysteine molecules

Nanoscale ◽  
2020 ◽  
Vol 12 (24) ◽  
pp. 12748-12752
Author(s):  
Jiaqi Zhao ◽  
Li Li ◽  
Fei Li ◽  
Huali Liu ◽  
Zhen Li ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Self Assembly ◽  
Carbon Dots ◽  
Excellent Electrochemical Performance

Facile formation of chiral nanofibers with excellent electrochemical performance via self-assembly.

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