Ultrasensitive multiplexed miRNA detection based on self-priming hairpin-triggered isothermal cascade reaction

2022 ◽  
Author(s):  
Jayeon Song ◽  
Chang Yeol Lee ◽  
Hyun Gyu Park
Keyword(s):  
Graphene Oxide ◽  
Adsorption Property ◽  
Cascade Reaction ◽  
Mirna Detection

We herein describe an ultrasensitive isothermal strategy to detect miRNAs in a multiplexed manner by utilizing self-priming hairpin-triggered cascade reaction and adsorption property of graphene oxide (GO). In principle, the...

scholarly journals Photocatalytic and adsorption property of ZnS–TiO2/RGO ternary composites for methylene blue degradation

2018 ◽  
Vol 37 (9-10) ◽  
pp. 764-776 ◽  
Author(s):  
YL Qin ◽  
WW Zhao ◽  
Z Sun ◽  
XY Liu ◽  
GL Shi ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Graphene Oxide ◽  
Visible Light ◽  
Adsorption Property ◽  
Light Irradiation ◽  
Tetrabutyl Titanate ◽  
Thermal Method ◽  
Photocatalytic Effect ◽  
Dioxide Powder ◽  
Visible Light Driven

The visible light–driven ZnS–TiO2/RGO nanocomposites, with good visible light–driven photocatalytic activity, utilizing graphene oxide as precursor, were successfully synthesized via a facile solvothermal thermal method with graphene oxide as precursor. Ti4+ ions were derived from titanium dioxide powder (TiO2, P25) and tetrabutyl titanate. S2− ions and Zn2+ ions were provided by sodium sulfide and zinc acetate, respectively. The photocatalytic and absorbance activity of the nanocomposites was investigated through the photocatalytic degradation of methylene blue in aqueous solution. The results showed that the ZnS–TiO2/RGO nanocomposite prepared by tetrabutyl titanate exhibited better photocatalytic and adsorbance activity for methylene blue under visible light irradiation and its photocatalytic efficiency reached 90% in 60-min light irradiation, almost 1.5 times that of the synthesized ZnS–TiO2/RGO by P25, which was attributed to a cooperative reaction because of an increase of photo-absorption effect of graphene sheets and photocatalytic effect of ZnS nanoparticles. The adsorbance activity for ZnS–TiO2/RGO–tetrabutyl titanate) reached 48%, which was almost 1.7 times higher than that of ZnS–TiO2/RGO-P25 and almost 3.7 times higher than that of ZnS/RGO.

Fabrication of macroporous polystyrene/graphene oxide composite monolith and its adsorption property for tetracycline

2016 ◽  
Vol 27 (4) ◽  
pp. 511-517 ◽  
Author(s):  
Le-Chen Chen ◽  
Shan Lei ◽  
Mo-Zhen Wang ◽  
Jun Yang ◽  
Xue-Wu Ge
Keyword(s):  
Graphene Oxide ◽  
Adsorption Property ◽  
Oxide Composite

scholarly journals One-Step Preparation of Graphene Oxide/Cellulose Nanofibril Hybrid Aerogel for Adsorptive Removal of Four Kinds of Antibiotics

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Jin Wang ◽  
Qiufang Yao ◽  
Chengmin Sheng ◽  
Chunde Jin ◽  
Qingfeng Sun
Keyword(s):  
Graphene Oxide ◽  
Adsorption Property ◽  
Isotherm Models ◽  
Cellulose Nanofibril ◽  
Order Model ◽  
Adsorption Capacities ◽  
Effective Removal ◽  
3D Network ◽  
Pseudo Second Order ◽  
One Step

Via a one-step ultrasonication method, cellulose nanofibril/graphene oxide hybrid (GO-CNF) aerogel was successfully prepared. The as-prepared GO-CNF possessed interconnected 3D network microstructure based on GO nanosheets grown along CNF through hydrogen bonds. The aerogel exhibited superior adsorption capacity toward four kinds of antibiotics. The removal percentages (R%) of these antibiotics were 81.5%, 79.5%, 79.1%, and 73.9% for Doxycycline (DXC), Chlortetracycline (CTC), Oxytetracycline (OTC), and tetracycline (TC), respectively. Simultaneously, the adsorption isotherms were well fitted to Langmuir model and kinetics study implied that the adsorption process was attributed to pseudo-second-order model. The maximum theoretical adsorption capacities of GO-CNF were 469.7, 396.5, 386.5, and 343.8 mg·g−1 for DXC, CTC, OTC, and TC, respectively, calculated by the Langmuir isotherm models. After five cycles, importantly, the regenerated aerogels still could be used with little degradation of adsorption property. Consequently, the as-synthesized GO-CNF was a successful application of effective removal of antibiotics.

A graphene oxide nanosensor enables the co-delivery of aptamer and peptide probes for fluorescence imaging of a cascade reaction in apoptotic signaling

The Analyst ◽  
2018 ◽  
Vol 143 (1) ◽  
pp. 208-214 ◽  
Author(s):  
Chang Liu ◽  
Yan-Lei Hu ◽  
Wen-Jing Deng ◽  
Qing-Shan Pan ◽  
Jin-Tao Yi ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Cytochrome C ◽  
Fluorescence Imaging ◽  
Caspase 3 ◽  
Cascade Reaction ◽  
Apoptotic Signaling ◽  
Cyt C ◽  
Peptide Probes

Cytochrome c (Cyt c) and caspase-3 are the key mediators in apoptotic signaling.

scholarly journals Electrocatalytic miRNA Detection Using Cobalt Porphyrin-Modified Reduced Graphene Oxide

Sensors ◽  
2014 ◽  
Vol 14 (6) ◽  
pp. 9984-9994 ◽  
Author(s):  
Camille De Souza ◽  
Samia Zrig ◽  
Dengjun Wang ◽  
Minh-Chau Pham ◽  
Benoit Piro
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Cobalt Porphyrin ◽  
Reduced Graphene ◽  
Mirna Detection

Preparation and adsorption property of graphene oxide by using waste graphite from diamond synthesis industry

2019 ◽  
Vol 221 ◽  
pp. 47-57 ◽  
Author(s):  
Saisai Ding ◽  
Shiping Sun ◽  
Hongliang Xu ◽  
Biye Yang ◽  
Yingying Liu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Adsorption Property ◽  
Diamond Synthesis

scholarly journals Preparation of Chitosan—Graphene Oxide Composite Aerogel by Hydrothermal Method and Its Adsorption Property of Methyl Orange

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2169
Author(s):  
Wei Zhu ◽  
Xueliang Jiang ◽  
Fangjun Liu ◽  
Feng You ◽  
Chu Yao
Keyword(s):  
Graphene Oxide ◽  
Methyl Orange ◽  
Specific Surface ◽  
Adsorption Capacity ◽  
Hydrothermal Method ◽  
Surface Area ◽  
Specific Surface Area ◽  
Adsorption Property ◽  
High Porosity ◽  
Composite Aerogel

Graphene based aerogel has become one of the most likely functional adsorption materials that is applicable to purify various contaminated water sources, such as dye wastewater, because of its high porosity, structural stability, large specific surface area, and high adsorption capacity. In this study, chitosan and graphene oxide were first selected as the matrix to prepare the composite hydrogel through the hydrothermal method, which was further frozen and dried to obtain the target aerogel. The microscopic structures and adsorption capacity of the composite aerogel were then characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), X-ray powder diffraction (XRD) and N2 (nitrogen) physical adsorption and desorption tests. The results show that the specific surface area of the composite aerogel was reached at 297.431 m2/g, which is higher than that of graphene oxide aerogel and chitosan aerogel. The aperture was reduced to about 3 nm. The adsorption rate of the composite aerogel for the methyl orange solution was as high as 97.2% at pH = 1, and the adsorption capacity was 48.6 mg/g. The adsorption process of the composite aerogel satisfies the Langmuir equation and can be described by the second-order adsorption kinetics. In addition, it is worth noting that this composite aerogel can provide a striking adsorption characteristic on methyl orange due to the combining effects from massive amino groups on chitosan and the structural conjugation of graphene oxide.

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