Fabrication and Reaction Efficiency Evaluation of Nano/Micro Structure with Carbon Nanotubes for Micro Bio Analysis

2011 ◽  
Vol 403-408 ◽  
pp. 1146-1152 ◽  
Author(s):  
Tatsuya Sameshima ◽  
Takuya Yabe ◽  
Ming Yang
Keyword(s):  
Carbon Nanotubes ◽  
Protein Adsorption ◽  
Chemical Vapor ◽  
Fluorescence Analysis ◽  
Self Organization ◽  
Efficiency Evaluation ◽  
Quartz Glass Substrate ◽  
Micro Structure ◽  
Spectroscopy Analysis ◽  
Reaction Field

In this study, carbon nanotubes (CNTs) are anticipated as nano/micro structured reaction field for micro Bio-Analysis. CNTs reaction field were made on quartz glass substrate using chemical vapor deposition and Self-Organization of CNTs. To evaluate and reveal the optimal structure of CNTs structure, protein adsorption characteristics were evaluated by fluorescence and transmitting spectroscopy analysis. By fluorescence analysis, it is revealed that proteins tend to adsorb to tip of CNTs structure and finer structure. Finally, protein adsorption was detected as a change of transmissivity of CNTs reaction field, and its detection limit was about 100 nmol/l. Time for analysis was greatly shortened by using transmitting spectroscopy.

Carbon Nanotube Gas Sensor Fabricated on Anodic Aluminum Oxide

2007 ◽  
Vol 124-126 ◽  
pp. 1309-1312
Author(s):  
Nguyen Duc Hoa ◽  
Nguyen Van Quy ◽  
Gyu Seok Choi ◽  
You Suk Cho ◽  
Se Young Jeong ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Gas Sensor ◽  
Chemical Vapor ◽  
Fast Response ◽  
Device Fabrication ◽  
Alumina Oxide ◽  
Response And Recovery ◽  
New Type ◽  
P Type

A new type of gas sensor was realized by directly depositing carbon nanotube on nano channels of the anodic alumina oxide (AAO) fabricated on p-type silicon substrate. The carbon nanotubes were synthesized by thermal chemical vapor deposition at a very high temperature of 1200 oC to improve the crystallinity. The device fabrication process was also developed. The contact of carbon nanotubes and p-type Si substrate showed a Schottky behavior, and the Schottky barrier height increased with exposure to gases while the overall conductivity decreased. The sensors showed fast response and recovery to ammonia gas upon the filling (400 mTorr) and evacuation.

Cobalt supported on carbon nanotubes for methane chemical vapor deposition towards carbon nanotubes

2021 ◽  
Author(s):  
Laura Esteves ◽  
Hugo Alvarenga Oliveira ◽  
Y. T. Xing ◽  
Fabio Barboza Passos
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Vapor Deposition ◽  
Heterogeneous Catalysis ◽  
Vapor Deposition ◽  
Supported Catalysts ◽  
Chemical Vapor

Carbon nanotubes (CNT) application in heterogeneous catalysis has been attracting growing interest. However, the use of CNT-supported catalysts in the chemical vapor deposition for the production of new CNT is...

Multiwall Carbon Nanotubes Non-covalently Functionalized by Porphyrin–Sn Networks for Protein Adsorption

2021 ◽  
Vol 4 (3) ◽  
pp. 2345-2350
Author(s):  
Chaofeng Wang ◽  
Yi Hao ◽  
Yue Wang ◽  
Huijia Song ◽  
Sameer Hussain ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Protein Adsorption ◽  
Multiwall Carbon Nanotubes ◽  
Multiwall Carbon

scholarly journals Synthesis of Poly(methacrylic acid-co-butyl acrylate) Grafted onto Functionalized Carbon Nanotube Nanocomposites for Drug Delivery

Polymers ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 533 ◽  
Author(s):  
Josué A. Torres-Ávalos ◽  
Leonardo R. Cajero-Zul ◽  
Milton Vázquez-Lepe ◽  
Fernando A. López-Dellamary ◽  
Antonio Martínez-Richa ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Drug Delivery ◽  
Methacrylic Acid ◽  
Butyl Acrylate ◽  
Chemical Vapor ◽  
Vis Spectroscopy ◽  
Ir And Raman Spectroscopies ◽  
Ft Ir

Design of a smart drug delivery system is a topic of current interest. Under this perspective, polymer nanocomposites (PNs) of butyl acrylate (BA), methacrylic acid (MAA), and functionalized carbon nanotubes (CNTsf) were synthesized by in situ emulsion polymerization (IEP). Carbon nanotubes were synthesized by chemical vapor deposition (CVD) and purified with steam. Purified CNTs were analyzed by FE-SEM and HR-TEM. CNTsf contain acyl chloride groups attached to their surface. Purified and functionalized CNTs were studied by FT-IR and Raman spectroscopies. The synthesized nanocomposites were studied by XPS, 13C-NMR, and DSC. Anhydride groups link CNTsf to MAA–BA polymeric chains. The potentiality of the prepared nanocomposites, and of their pure polymer matrices to deliver hydrocortisone, was evaluated in vitro by UV–VIS spectroscopy. The relationship between the chemical structure of the synthesized nanocomposites, or their pure polymeric matrices, and their ability to release hydrocortisone was studied by FT-IR spectroscopy. The hydrocortisone release profile of some of the studied nanocomposites is driven by a change in the inter-associated to self-associated hydrogen bonds balance. The CNTsf used to prepare the studied nanocomposites act as hydrocortisone reservoirs.

Comparison of Chemical Vapor Sensing Properties between Graphene and Carbon Nanotubes

2012 ◽  
Vol 51 ◽  
pp. 045101 ◽  
Author(s):  
Hyung Goo Park ◽  
Sukju Hwang ◽  
Juhwan Lim ◽  
Duck-Hwan Kim ◽  
In Sang Song ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Vapor ◽  
Sensing Properties ◽  
Vapor Sensing ◽  
Chemical Vapor Sensing
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