scholarly journals Amperometric Sensing of Carbon Monoxide: Improved Sensitivity and Selectivity via Nanostructure-Controlled Electrodeposition of Gold

Biosensors ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 334
Author(s):  
Taehui Kwon ◽  
Hee Young Mun ◽  
Sunghwa Seo ◽  
Areum Yu ◽  
Chongmok Lee ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Precursor Solution ◽  
Surface Hydrophobicity ◽  
Deposition Potential ◽  
Aminobutyric Acid ◽  
Selective Detection ◽  
Signaling Molecule ◽  
Sensitivity And Selectivity ◽  
Fine Control ◽  
Amperometric Sensing

A series of gold (Au) nanostructures, having different morphologies, were fabricated for amperometric selective detection of carbon monoxide (CO), a biologically important signaling molecule. Au layers were electrodeposited from a precursor solution of 7 mM HAuCl4 with a constant deposition charge (0.04 C) at various deposition potentials. The obtained Au nanostructures became rougher and spikier as the deposition potential lowered from 0.45 V to 0.05 V (vs. Ag/AgCl). As prepared Au layers showed different hydrophobicity: The sharper morphology, the greater hydrophobicity. The Au deposit formed at 0.05 V had the sharpest shape and the greatest surface hydrophobicity. The sensitivity of an Au deposit for amperometric CO sensing was enhanced as the Au surface exhibits higher hydrophobicity. In fact, CO selectivity over common electroactive biological interferents (L-ascorbic acid, 4-acetamidophenol, 4-aminobutyric acid and nitrite) was improved eminently once the Au deposit became more hydrophobic. The most hydrophobic Au was also confirmed to sense CO exclusively without responding to nitric oxide, another similar gas signaling molecule, in contrast to a hydrophobic platinum (Pt) counterpart. This study presents a feasible strategy to enhance the sensitivity and selectivity for amperometric CO sensing via the fine control of Au electrode nanostructures.

scholarly journals Recent Advances in ZnO-Based Carbon Monoxide Sensors: Role of Doping

Sensors ◽  
2021 ◽  
Vol 21 (13) ◽  
pp. 4425
Author(s):  
Ana María Pineda-Reyes ◽  
María R. Herrera-Rivera ◽  
Hugo Rojas-Chávez ◽  
Heriberto Cruz-Martínez ◽  
Dora I. Medina
Keyword(s):  
Carbon Monoxide ◽  
High Performance ◽  
Gas Sensing ◽  
Experimental Studies ◽  
Electrical Performance ◽  
Long Term Stability ◽  
Sensing Applications ◽  
Recent Advances ◽  
Sensitivity And Selectivity ◽  
Doped Zno

Monitoring and detecting carbon monoxide (CO) are critical because this gas is toxic and harmful to the ecosystem. In this respect, designing high-performance gas sensors for CO detection is necessary. Zinc oxide-based materials are promising for use as CO sensors, owing to their good sensing response, electrical performance, cost-effectiveness, long-term stability, low power consumption, ease of manufacturing, chemical stability, and non-toxicity. Nevertheless, further progress in gas sensing requires improving the selectivity and sensitivity, and lowering the operating temperature. Recently, different strategies have been implemented to improve the sensitivity and selectivity of ZnO to CO, highlighting the doping of ZnO. Many studies concluded that doped ZnO demonstrates better sensing properties than those of undoped ZnO in detecting CO. Therefore, in this review, we analyze and discuss, in detail, the recent advances in doped ZnO for CO sensing applications. First, experimental studies on ZnO doped with transition metals, boron group elements, and alkaline earth metals as CO sensors are comprehensively reviewed. We then focused on analyzing theoretical and combined experimental–theoretical studies. Finally, we present the conclusions and some perspectives for future investigations in the context of advancements in CO sensing using doped ZnO, which include room-temperature gas sensing.

scholarly journals Adapting decarbonylation chemistry for the development of prodrugs capable of in-vivo delivery of carbon monoxide utilizing sweeteners as carrier molecules

2021 ◽  
Author(s):  
Ladie Kimberly De La Cruz ◽  
Xiaoxiao Yang ◽  
Anna Menshikh ◽  
Maya Brewer ◽  
Wen Lu ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Animal Models ◽  
Therapeutic Agent ◽  
Organ Injury ◽  
Signaling Molecule ◽  
In Vivo Delivery ◽  
Co Gas

Carbon monoxide as an endogenous signaling molecule exhibits pharmacological efficacy in various animal models of organ injury. To address the difficulty in using CO gas as a therapeutic agent for...

Easy-to-Fabricate K2Pd(SO3)2-Dyed Polyester Fabric with Highly Selective and Fast Response to Carbon Monoxide

2021 ◽  
Vol 21 (8) ◽  
pp. 4400-4405
Author(s):  
Junyeop Lee ◽  
Nam Gon Do ◽  
Dong Hyuk Jeong ◽  
Sae-Wan Kim ◽  
Maeum Han ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Color Change ◽  
High Sensitivity ◽  
Cost Effective ◽  
Fast Response ◽  
Polyester Fabric ◽  
High Porosity ◽  
Sensing Material ◽  
Sensitivity And Selectivity ◽  
And Performance

Carbon monoxide (CO) is an odorless, colorless, tasteless, extremely flammable, and highly toxic gas. It is produced when there is insufficient oxygen supply during the combustion of carbon to produce carbon dioxide (CO2). CO is produced from operating engines, stoves, or furnaces. CO poisoning occurs when CO accumulates in the bloodstream and can result in severe tissue damage or even death. Many types of CO sensors have been reported, including electrochemical, semiconductor metal-oxide, catalytic combustion, thermal conductivity, and infrared absorption-type for the detection of CO. However, despite their excellent selectivity and sensitivity, issues such as complexity, power consumption, and calibration limit their applications. In this study, a fabricbased colorimetric CO sensor is proposed to address these issues. Potassium disulfitopalladate (II) (K2Pd(SO3)2) is dyed on a polyester fabric as a sensing material for selective CO detection. The sensing characteristics and performance are investigated using optical instruments such as RGB sensor and spectrometer. The sensor shows immediate color change when exposed to CO at a concentration that is even lower than 20 ppm before 2 min. The fast response time of the sensor is attributed to its high porosity to react with CO. This easy-to-fabricate and cost-effective sensor can detect and prevent the leakage of CO simultaneously with high sensitivity and selectivity toward CO.

scholarly journals A novel fluorescent sensor based on sulfur and nitrogen co-doped carbon dots with excellent stability for selective detection of doxycycline in raw milk

RSC Advances ◽  
2017 ◽  
Vol 7 (21) ◽  
pp. 12827-12834 ◽  
Author(s):  
Jinping Song ◽  
Jing Li ◽  
Ziying Guo ◽  
Wen Liu ◽  
Qi Ma ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Fluorescent Sensor ◽  
Raw Milk ◽  
Selective Detection ◽  
Sensitivity And Selectivity ◽  
Doped Carbon Dots ◽  
Co Doped ◽  
Excellent Stability

Sulfur and nitrogen co-doped carbon dots obtained from casein exhibited excellent sensitivity and selectivity for the detection of doxycycline.

Sensitive and selective detection of microRNA in complex biological samples based on protein-enhanced fluorescence anisotropy

2020 ◽  
Vol 12 (5) ◽  
pp. 687-692 ◽  
Author(s):  
Yan Li ◽  
Yao Sun ◽  
Jieyun Ye ◽  
Fengping Pan ◽  
Bo Peng ◽  
...  
Keyword(s):  
Molecular Mass ◽  
Biological Samples ◽  
Fluorescence Anisotropy ◽  
High Sensitivity ◽  
Selective Detection ◽  
Enhanced Fluorescence ◽  
Sensitivity And Selectivity

A molecular mass amplifying strategy to construct a fluorescence anisotropy sensor for the detection of microRNA with high sensitivity and selectivity in complex biological samples was proposed.

A naphthalimide-based fluorescence ‘‘turn-on’’ chemosensor for highly selective detection of carbon monoxide: imaging applications in living cells

2018 ◽  
Vol 42 (16) ◽  
pp. 13497-13502 ◽  
Author(s):  
Biswajit Das ◽  
Somenath Lohar ◽  
Ayan Patra ◽  
Ejaj Ahmmed ◽  
Sushil Kumar Mandal ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Living Cells ◽  
Selective Detection ◽  
Hepes Buffer ◽  
Turn On ◽  
Fluorescence Turn On

A naphthalimide-based fluorescence chemosensor, COFP, was designed and synthesized for the detection of carbon monoxide (CO) in HEPES buffer (pH 7.4, 37 °C).

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