scholarly journals Volatile Organic Molecules Sorption onto Carbon Nanotubes: Experiment and Molecular Modeling

2016 ◽  
Vol 12 ◽  
pp. 142-146 ◽  
Author(s):  
Gražyna Simha Martynková ◽  
Daniela Plachá ◽  
Eva Plevová
Keyword(s):  
Carbon Nanotubes ◽  
Molecular Modeling ◽  
Organic Molecules ◽  
Volatile Organic

Carbon Nanotubes in Physiological Environment

2012 ◽  
Vol 1487 ◽  
Author(s):  
R. Cué ◽  
G. Del Bosque ◽  
A. Sanchez
Keyword(s):  
Carbon Nanotubes ◽  
Immune Response ◽  
Carbon Nanotube ◽  
Organic Molecules ◽  
Clinical Applications ◽  
Polymer Matrices ◽  
Cellular Interaction ◽  
Polymer Fillers

ABSTRACTTo fully accomplish all promises and hopes on clinical applications of carbon nanotubes, it is crucial to understand their interactions with physiological environment. One of these applications is polymer fillers, and it is important to review the toxicology of carbon nanotubes themselves because some polymer matrices may be biodegradable. Therefore, the interactions with organic molecules such as water, electrolytes, and proteins are reviewed and results of multiple studies on cellular interaction, cytotoxicity, immune response, biodistribution, and biopersistence are further presented. Finally, a section describing the interaction of polymer matrices with carbon nanotube reinforcements and the physiological environment is presented.

A rationally designed vapoluminescent compound with adsorptive channels and responsive luminophores for volatile organic compounds (VOCs)

2019 ◽  
Vol 48 (4) ◽  
pp. 1179-1183 ◽  
Author(s):  
Mingxue Yang ◽  
Xiao-Ning Li ◽  
Ji-Hui Jia ◽  
Xu-Lin Chen ◽  
Can-Zhong Lu
Keyword(s):  
Volatile Organic Compounds ◽  
Solvent Effect ◽  
Organic Compounds ◽  
Organic Molecules ◽  
Volatile Organic ◽  
First Time

We designed a sensor compound which for the first time combines the solvent effect of ICT organic molecules with large channels adsorbing VOCs.

scholarly journals Gas Biosensor Arrays Based on Single-Stranded DNA-Functionalized Single-Walled Carbon Nanotubes for the Detection of Volatile Organic Compound Biomarkers Released by Huanglongbing Disease-Infected Citrus Trees

Sensors ◽  
2019 ◽  
Vol 19 (21) ◽  
pp. 4795 ◽  
Author(s):  
Hui Wang ◽  
Pankaj Ramnani ◽  
Tung Pham ◽  
Claudia Chaves Villarreal ◽  
Xuejun Yu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Uv Spectroscopy ◽  
Single Walled Carbon Nanotubes ◽  
Disease Diagnosis ◽  
Single Stranded Dna ◽  
Biosensor Arrays ◽  
Single Walled Carbon ◽  
Volatile Organic ◽  
Walled Carbon Nanotubes ◽  
Citrus Trees

Volatile organic compounds (VOCs) released by plants are closely associated with plant metabolism and can serve as biomarkers for disease diagnosis. Huanglongbing (HLB), also known as citrus greening or yellow shoot disease, is a lethal threat to the multi-billion-dollar citrus industry. Early detection of HLB is vital for removal of susceptible citrus trees and containment of the disease. Gas sensors are applied to monitor the air quality or toxic gases owing to their low-cost fabrication, smooth operation, and possible miniaturization. Here, we report on the development, characterization, and application of electrical biosensor arrays based on single-walled carbon nanotubes (SWNTs) decorated with single-stranded DNA (ssDNA) for the detection of four VOCs—ethylhexanol, linalool, tetradecene, and phenylacetaldehyde—that serve as secondary biomarkers for detection of infected citrus trees during the asymptomatic stage. SWNTs were noncovalently functionalized with ssDNA using π–π interaction between the nucleotide and sidewall of SWNTs. The resulting ssDNA-SWNT hybrid structure and device properties were investigated using Raman spectroscopy, ultraviolet (UV) spectroscopy, and electrical measurements. To monitor changes in the four VOCs, gas biosensor arrays consisting of bare SWNTs before and after being decorated with different ssDNA were employed to determine the different concentrations of the four VOCs. The data was processed using principal component analysis (PCA) and neural net fitting (NNF).

scholarly journals Effect of NO<sub><i>x</i></sub> on 1,3,5-trimethylbenzene (TMB) oxidation product distribution and particle formation

2019 ◽  
Vol 19 (23) ◽  
pp. 15073-15086 ◽  
Author(s):  
Epameinondas Tsiligiannis ◽  
Julia Hammes ◽  
Christian Mark Salvador ◽  
Thomas F. Mentel ◽  
Mattias Hallquist
Keyword(s):  
Urban Areas ◽  
Organic Molecules ◽  
Flow Reactor ◽  
Organic Aerosol ◽  
Product Distribution ◽  
Particle Formation ◽  
Product Distributions ◽  
Tropospheric Aerosol ◽  
Volatile Organic ◽  
Free Environment

Abstract. Secondary organic aerosol (SOA) represents a significant fraction of the tropospheric aerosol and its precursors are volatile organic compounds (VOCs). Anthropogenic VOCs (AVOC) dominate the VOC budget in many urban areas with 1,3,5-trimethylbenzene (TMB) being among the most reactive aromatic AVOCs. TMB formed highly oxygenated organic molecules (HOMs) in an NOx-free environment, which could contribute to new particle formation (NPF) depending on oxidation conditions where elevated OH oxidation enhanced particle formation. The experiments were performed in an oxidation flow reactor, the Go:PAM unit, under controlled OH oxidation conditions. By addition of NOx to the system we investigated the effect of NOx on particle formation and on the product distribution. We show that the formation of HOMs, and especially HOM accretion products, strongly varies with NOx conditions. We observe a suppression of HOM and particle formation with increasing NOx/ΔTMB ratio and an increase in the formation of organonitrates (ONs) mostly at the expense of HOM accretion products. We propose reaction mechanisms and pathways that explain the formation and observed product distributions with respect to oxidation conditions. We hypothesise that, based on our findings from TMB oxidation studies, aromatic AVOCs may not contribute significantly to NPF under typical NOx/AVOC conditions found in urban atmospheres.

Modeling permeation of volatile organic molecules through reverse osmosis spiral-wound membranes

2009 ◽  
Vol 330 (1-2) ◽  
pp. 40-50 ◽  
Author(s):  
Camille Sagne ◽  
Claire Fargues ◽  
Bertrand Broyart ◽  
Marie-Laure Lameloise ◽  
Martine Decloux
Keyword(s):  
Reverse Osmosis ◽  
Organic Molecules ◽  
Volatile Organic ◽  
Spiral Wound
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