Label-Free SERS Quantum Semiconductor Probe for Molecular-Level and in Vitro Cellular Detection: A Noble-Metal-Free Methodology

2018 ◽  
Vol 10 (41) ◽  
pp. 34886-34904 ◽  
Author(s):  
Meysam Keshavarz ◽  
Bo Tan ◽  
Krishnan Venkatakrishnan
Keyword(s):  
Noble Metal ◽  
Molecular Level ◽  
Label Free ◽  
Metal Free ◽  
Quantum Semiconductor

Surface Functionalization of g-C3N4: Molecular-Level Design of Noble-Metal-Free Hydrogen Evolution Photocatalysts

2015 ◽  
Vol 21 (29) ◽  
pp. 10290-10295 ◽  
Author(s):  
Yin Chen ◽  
Bin Lin ◽  
Weili Yu ◽  
Yong Yang ◽  
Shahid M. Bashir ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Noble Metal ◽  
Surface Functionalization ◽  
Molecular Level ◽  
Metal Free ◽  
Free Hydrogen ◽  
Level Design

Frontispiece: Surface Functionalization of g-C3N4: Molecular-Level Design of Noble-Metal-Free Hydrogen Evolution Photocatalysts

2015 ◽  
Vol 21 (29) ◽  
pp. n/a-n/a ◽  
Author(s):  
Yin Chen ◽  
Bin Lin ◽  
Weili Yu ◽  
Yong Yang ◽  
Shahid M. Bashir ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Noble Metal ◽  
Surface Functionalization ◽  
Molecular Level ◽  
Metal Free ◽  
Free Hydrogen ◽  
Level Design

P-Type Cobalt Phosphide Composites (CoP–Co2P) Decorated on Titanium Oxide for Enhanced Noble-Metal-Free Photocatalytic H2 Evolution Activity

Langmuir ◽  
2021 ◽  
Vol 37 (11) ◽  
pp. 3321-3330
Author(s):  
Rong Liang ◽  
Yanwen Wang ◽  
Chao Qin ◽  
Xuehua Chen ◽  
Zhizhen Ye ◽  
...  
Keyword(s):  
Titanium Oxide ◽  
Noble Metal ◽  
H2 Evolution ◽  
Metal Free ◽  
Cobalt Phosphide ◽  
P Type ◽  
Photocatalytic H2 Evolution

scholarly journals Adipo-Derived Stem Cell Features and MCF-7

Cells ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 1754
Author(s):  
Giuseppe Garroni ◽  
Francesca Balzano ◽  
Sara Cruciani ◽  
Renzo Pala ◽  
Donatella Coradduzza ◽  
...  
Keyword(s):  
Stem Cell ◽  
Molecular Level ◽  
Cancer Cell Line ◽  
Human Adipose Tissue ◽  
Cell Cycle Regulators ◽  
Culturing Conditions ◽  
And Migration ◽  
Related Proteins ◽  
Mcf 7

Human adipose tissue-derived stem cells (hADSCs) are highly suitable for regeneration therapies being easily collected and propagated in vitro. The effects of different external factors and culturing conditions are able to affect hADSC proliferation, senescence, differentiation, and migration, even at the molecular level. In the present paper, we exposed hADSCs to an exhausted medium from the breast cancer cell line (MCF-7) to evaluate whether the soluble factors released by these cells may be able to induce changes in stem cell behavior. In particular, we investigated the expression of stemness-related genes (OCT4; Sox 2; Nanog), the cell-cycle regulators p21 (WAF1/CIP1) p53, epigenetic markers (DNMT1 and Sirt1), and autophagy-related proteins. From our results, we can infer that the exhausted medium from MCF-7 is able to influence the hADSCs behavior increasing the expression of stemness-related genes, cell proliferation, and autophagy. Polyamines detectable in MCF-7 exhausted medium could be related to the higher proliferation capability observed in hADSCs, suggesting direct crosstalk between these molecules and the observed changes in stem cell potency.

scholarly journals Converting copper sulfide to copper with surface sulfur for electrocatalytic alkyne semi-hydrogenation with water

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Yongmeng Wu ◽  
Cuibo Liu ◽  
Changhong Wang ◽  
Yifu Yu ◽  
Yanmei Shi ◽  
...  
Keyword(s):  
Binding Energy ◽  
Noble Metal ◽  
Atomic Hydrogen ◽  
Copper Sulfide ◽  
Low Cost ◽  
Water Electrolysis ◽  
Metal Free ◽  
Copper Nanowire

AbstractElectrocatalytic alkyne semi-hydrogenation to alkenes with water as the hydrogen source using a low-cost noble-metal-free catalyst is highly desirable but challenging because of their over-hydrogenation to undesired alkanes. Here, we propose that an ideal catalyst should have the appropriate binding energy with active atomic hydrogen (H*) from water electrolysis and a weaker adsorption with an alkene, thus promoting alkyne semi-hydrogenation and avoiding over-hydrogenation. So, surface sulfur-doped and -adsorbed low-coordinated copper nanowire sponges are designedly synthesized via in situ electroreduction of copper sulfide and enable electrocatalytic alkyne semi-hydrogenation with over 99% selectivity using water as the hydrogen source, outperforming a copper counterpart without surface sulfur. Sulfur anion-hydrated cation (S2−-K+(H2O)n) networks between the surface adsorbed S2− and K+ in the KOH electrolyte boost the production of active H* from water electrolysis. And the trace doping of sulfur weakens the alkene adsorption, avoiding over-hydrogenation. Our catalyst also shows wide substrate scopes, up to 99% alkenes selectivity, good reducible groups compatibility, and easily synthesized deuterated alkenes, highlighting the promising potential of this method.

scholarly journals Double Perovskite Cobaltites Integrated in a Monolithic and Noble Metal-Free Photoelectrochemical Device for Efficient Water Splitting

2021 ◽  
Author(s):  
Junjie Zhu ◽  
Jónína B. Guđmundsdóttir ◽  
Ragnar Strandbakke ◽  
Kevin G. Both ◽  
Thomas Aarholt ◽  
...  
Keyword(s):  
Water Splitting ◽  
Noble Metal ◽  
Double Perovskite ◽  
Metal Free

Noble-metal-free dye-sensitized selective oxidation of methane to methanol with green light (550 nm)

Nano Research ◽  
2021 ◽  
Author(s):  
Xingyang Wu ◽  
Yi Zeng ◽  
Hangchen Liu ◽  
Jiaqing Zhao ◽  
Tierui Zhang ◽  
...  
Keyword(s):  
Selective Oxidation ◽  
Noble Metal ◽  
Green Light ◽  
Metal Free ◽  
Dye Sensitized ◽  
Oxidation Of Methane

A silicon-based hybrid photocathode modified with an N5-chelated nickel catalyst in a noble-metal-free biomimetic photoelectrochemical cell for solar-driven unbiased overall water splitting

2021 ◽  
Author(s):  
Lunlun Gong ◽  
Peili Zhang ◽  
Guoquan Liu ◽  
Yu Shan ◽  
Mei Wang
Keyword(s):  
Water Splitting ◽  
Nickel Catalyst ◽  
Noble Metal ◽  
Photoelectrochemical Cell ◽  
Metal Free ◽  
Overall Water Splitting ◽  
Redox Catalysts ◽  
Silicon Based ◽  
Modification Of The Surface

Modification of the surface of semiconductor-based photoelectrodes with molecular redox catalysts gives a way to realize atom-efficient catalysis for photoelectrochemical (PEC) H2 and O2 evolution. However, the diversity of immobilized...

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