Efficient photothermal conversion of Fe 2 O 3 – RGO guided from ultrafast quenching effect of photoexcited state

AIChE Journal ◽  
2020 ◽  
Vol 66 (6) ◽  
Author(s):  
Yuang Zhang ◽  
Gagik G. Gurzadyan ◽  
Rongwen Lu ◽  
Shufen Zhang ◽  
Xin Jin ◽  
...  
Keyword(s):  
Photothermal Conversion ◽  
Quenching Effect ◽  
Photoexcited State

scholarly journals Chitosan/Silver Nanoparticle/Graphene Oxide Nanocomposites with Multi-Drug Release, Antimicrobial, and Photothermal Conversion Functions

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2351
Author(s):  
Zheng Su ◽  
Daye Sun ◽  
Li Zhang ◽  
Miaomiao He ◽  
Yulin Jiang ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Graphene Oxide ◽  
Drug Release ◽  
Release Rate ◽  
Composite System ◽  
Methyl Blue ◽  
Burst Release ◽  
Fluorescein Sodium ◽  
Photothermal Conversion ◽  
Dual Drug

In this work, we designed and fabricated a multifunctional nanocomposite system that consists of chitosan, raspberry-like silver nanoparticles, and graphene oxide. The room temperature atmospheric pressure microplasma (RT-APM) process provides a rapid, facile, and environmentally-friendly method for introducing silver nanoparticles into the composite system. Our composite can achieve a pH controlled single and/or dual drug release. Under pH 7.4 for methyl blue loaded on chitosan, the drug release profile features a burst release during the first 10 h, followed by a more stabilized release of 70–80% after 40–50 h. For fluorescein sodium loaded on graphene oxide, the drug release only reached 45% towards the end of 240 h. When the composite acted as a dual drug release system, the interaction of fluorescein sodium and methyl blue slowed down the methyl blue release rate. Under pH 4, both single and dual drug systems showed a much higher release rate. In addition, our composite system demonstrated strong antibacterial abilities against E. coli and S. aureus, as well as an excellent photothermal conversion effect under irradiation of near infrared lasers. The photothermal conversion efficiency can be controlled by the laser power. These unique functionalities of our nanocomposite point to its potential application in multiple areas, such as multimodal therapeutics in healthcare, water treatment, and anti-microbials, among others.

Molecular docking, quorum quenching effect, antibiofilm activity and safety profile of silver-complexed sulfonamide on Pseudomonas aeruginosa

Biofouling ◽  
2021 ◽  
pp. 1-17
Author(s):  
Fallon dos Santos Siqueira ◽  
Camilla Filippi dos Santos Alves ◽  
Alencar Kolinski Machado ◽  
Josiéli Demétrio Siqueira ◽  
Thiago dos Santos ◽  
...  
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Molecular Docking ◽  
Safety Profile ◽  
Quorum Quenching ◽  
Antibiofilm Activity ◽  
Quenching Effect

Droplet Evaporation on a Hydrophobic Photothermal Conversion Substrate

2021 ◽  
Author(s):  
Haonan Li ◽  
Rong Chen ◽  
Xun Zhu ◽  
Qiang Liao ◽  
Dingding Ye ◽  
...  
Keyword(s):  
Droplet Evaporation ◽  
Photothermal Conversion

scholarly journals Ratiometric Fluorescent Biosensors for Glucose and Lactate Using an Oxygen-Sensing Membrane

Biosensors ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 208
Author(s):  
Hong Dinh Duong ◽  
Jong Il Rhee
Keyword(s):  
Limit Of Detection ◽  
Oxygen Sensing ◽  
High Sensitivity ◽  
Glucose Sensing ◽  
Oxidation Reactions ◽  
Lactate Oxidase ◽  
Lactate Oxidation ◽  
Detection Range ◽  
Quenching Effect ◽  
Sensing Membrane

In this study, ratiometric fluorescent glucose and lactate biosensors were developed using a ratiometric fluorescent oxygen-sensing membrane immobilized with glucose oxidase (GOD) or lactate oxidase (LOX). Herein, the ratiometric fluorescent oxygen-sensing membrane was fabricated with the ratio of two emission wavelengths of platinum meso-tetra (pentafluorophenyl) porphyrin (PtP) doped in polystyrene particles and coumarin 6 (C6) captured into silica particles. The operation mechanism of the sensing membranes was based on (i) the fluorescence quenching effect of the PtP dye by oxygen molecules, and (ii) the consumption of oxygen levels in the glucose or lactate oxidation reactions under the catalysis of GOD or LOX. The ratiometric fluorescent glucose-sensing membrane showed high sensitivity to glucose in the range of 0.1–2 mM, with a limit of detection (LOD) of 0.031 mM, whereas the ratiometric fluorescent lactate-sensing membrane showed the linear detection range of 0.1–0.8 mM, with an LOD of 0.06 mM. These sensing membranes also showed good selectivity, fast reversibility, and stability over long-term use. They were applied to detect glucose and lactate in artificial human serum, and they provided reliable measurement results.

Sign in / Sign up

Export Citation Format

Share Document