Interaction of carbon nanotubes with curcumin: Effect of temperature and pH on simultaneous static and dynamic fluorescence quenching of curcumin using carbon nanotubes

Luminescence ◽  
2020 ◽  
Vol 35 (5) ◽  
pp. 659-666
Author(s):  
Lucia Youssef ◽  
Digambara Patra
Keyword(s):  
Carbon Nanotubes ◽  
Fluorescence Quenching ◽  
Effect Of Temperature ◽  
Dynamic Fluorescence

Carbon Nanotubes Grown on Metallic Wires by Cold Plasma Technique

2002 ◽  
Vol 737 ◽  
Author(s):  
D. Sarangi ◽  
A. Karimi
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Growth Conditions ◽  
Effect Of Temperature ◽  
Rutherford Back Scattering ◽  
Novel Approach ◽  
Transmission Electron ◽  
Back Scattering ◽  
Metallic Wires ◽  
Metal Wires

ABSTRACTCarbon nanotubes on metallic wires may be act as electrode for the field emission (FE) luminescent devices. Growing nanotubes on metallic wires with controlled density, length and alignment are challenging issues for this kind of devices. We, in the present investigation grow carbon nanotubes directly on the metal wires by a powerful but simple technique. A novel approach has been proposed to align nanotubes during growth. Methane, acetylene and dimethylamine have been used as source gases. With the same growth conditions (viz. pressure, growth temperature and plasma) methane does not produce any nanotube but nanotubes grown with dimethylamine show shorter length and radius than acetylene. The effect of temperature to control the radius, time to control the density, plasma conditions to align the nanotubes has been focused. Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and Rutherford Back Scattering (RBS) are used to characterize the nanotubes.

TEMPERATURE DEPENDENCE OF ELECTRICAL RESISTANCE OF INDIVIDUAL CARBON NANOTUBES AND CARBON NANOTUBES NETWORK

2012 ◽  
Vol 26 (21) ◽  
pp. 1250136 ◽  
Author(s):  
SAJJAD DEHGHANI ◽  
MOHAMMAD KAZEM MORAVVEJ-FARSHI ◽  
MOHAMMAD HOSSEIN SHEIKHI
Keyword(s):  
Carbon Nanotubes ◽  
Temperature Dependence ◽  
Electric Fields ◽  
Electrical Resistance ◽  
Electrode Materials ◽  
Effect Of Temperature ◽  
Electrode Spacing ◽  
Single Wall Carbon Nanotubes ◽  
Tube Metal

We present a model to understand the effect of temperature on the electrical resistance of individual semiconducting single wall carbon nanotubes (s-SWCNTs) of various diameters under various electric fields. The temperature dependence of the resistance of s-SWCNTs and metallic SWCNTs (m-SWCNTs) are compared. These results help us to understand the temperature dependence of the resistance of SWCNTs network. We experimentally examine the temperature dependence of the resistance of random networks of SWCNTs, prepared by dispersing CNTs in ethanol and drop-casting the solution on prefabricated metallic electrodes. Examining various samples with different electrode materials and spacings, we find that the dominant resistance in determination of the temperature dependence of resistance of the network is the resistance of individual tubes, rather than the tube–tube resistance or tube–metal contact resistance. It is also found that the tube–tube resistance depends on the electrode spacing and it is more important for larger electrode spacings. By applying high electric field to burn the all-metallic paths of the SWCNTs network, the temperature dependence of the resistance of s-SWCNTs is also examined. We also investigate the effect of acid treatment of CNTs on the temperature dependence of the resistance of SWCNTs and also multi-wall CNTs (MWCNTs) networks.

Effect of temperature on multiple competitive processes for co-production of carbon nanotubes and hydrogen during catalytic reforming of toluene

Fuel ◽  
2020 ◽  
Vol 264 ◽  
pp. 116749 ◽  
Author(s):  
Limo He ◽  
Guang Liao ◽  
Song Hu ◽  
Long Jiang ◽  
Hengda Han ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Effect Of Temperature ◽  
Catalytic Reforming

scholarly journals Substrate-Based Near-Infrared Imaging Sensors Enable Fluorescence Lifetime Contrast via Built-in Dynamic Fluorescence Quenching Elements

ACS Sensors ◽  
2016 ◽  
Vol 1 (4) ◽  
pp. 427-436 ◽  
Author(s):  
Anand T. N. Kumar ◽  
William L. Rice ◽  
Jessica C. López ◽  
Suresh Gupta ◽  
Craig J. Goergen ◽  
...  
Keyword(s):  
Fluorescence Quenching ◽  
Fluorescence Lifetime ◽  
Near Infrared ◽  
Infrared Imaging ◽  
Near Infrared Imaging ◽  
Imaging Sensors ◽  
Dynamic Fluorescence

MODELING THE CONCENTRATIONS AND EFFICIENCIES FOR THE INTERACTING SPECIES OF PYROPHEOPHORBIDE METHYL ESTER-COPPER ASSOCIATION

2013 ◽  
Vol 08 (01n02) ◽  
pp. 73-87 ◽  
Author(s):  
S. AL-OMARI
Keyword(s):  
Methyl Ester ◽  
Fluorescence Quenching ◽  
Binding Site ◽  
Binding Constant ◽  
Pharmacokinetics And Pharmacodynamics ◽  
Dynamic Binding ◽  
Binding Interaction ◽  
Interacting Species ◽  
Different Temperatures ◽  
Dynamic Fluorescence

The interaction between pyropheophorbide methyl ester (PPME) and Cu 2+ was investigated using UV-vis and fluorescence spectrscopy. Study of the binding interaction between PPME and Cu 2+ could contribute to understanding of its pharmacokinetics and pharmacodynamics. Parameters of the static and dynamic fluorescence quenching of PPME- Cu 2+ association were calculated at different temperatures. For binding site of 1:1 at 299 K, the static binding constant (kS), the static isosbestic concentration ([Formula: see text]), the dynamic binding constant (kD), and the dynamic isosbestic concentration ([Formula: see text]) are, respectively, 61 M-1, 0.0164 M, 75 M-1, and 0.0133 M. The concentrations and efficiencies of the intermediates species were modeled. Satisfactory correspondence between the experimental and calculated results was found.

Dynamic fluorescence quenching by 2,4,6-trinitrophenol in the voids of an aggregation induced emission based fluorescent probe

2017 ◽  
Vol 41 (17) ◽  
pp. 8739-8747 ◽  
Author(s):  
Neetu Tripathi ◽  
Prabhpreet Singh ◽  
Subodh Kumar
Keyword(s):  
Fluorescence Quenching ◽  
Fluorescent Probe ◽  
Linear Change ◽  
Aggregation Induced Emission ◽  
Dynamic Fluorescence

PY-DNSfollows dynamic fluorescence quenching with TNP to elicit a linear change in fluorescence quenching over eight orders of concentration of TNP (10−13–10−5M).

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