Nanoporous Carbon Nanotubes Synthesized through Confined Hydrogen-Bonding Self-Assembly

2006 ◽  
Vol 128 (29) ◽  
pp. 9276-9277 ◽  
Author(s):  
Adrian T. Rodriguez ◽  
Min Chen ◽  
Zhu Chen ◽  
C. Jeffrey Brinker ◽  
Hongyou Fan
Keyword(s):  
Carbon Nanotubes ◽  
Hydrogen Bonding ◽  
Self Assembly ◽  
Nanoporous Carbon

Fabrication of mesoporous metal oxide coated-nanocarbon hybrid materials via a polyol-mediated self-assembly process

Nanoscale ◽  
2014 ◽  
Vol 6 (23) ◽  
pp. 14371-14379 ◽  
Author(s):  
Bingmei Feng ◽  
Huixin Wang ◽  
Dongniu Wang ◽  
Huilong Yu ◽  
Yi Chu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Hydrogen Bonding ◽  
Metal Oxide ◽  
Hybrid Materials ◽  
Self Assembly ◽  
Polymer Chains ◽  
Carboxyl Groups ◽  
Graphene Sheets ◽  
Assembly Process ◽  
Mesoporous Metal

The hydrogen bonding between the carboxyl groups of carbon nanotubes (CNTs) and the polymer chains of metal oxide precursors can initiate the deposition in a self-assembly manner. Then metal oxide coated-carboxylated CNTs or coated-carboxylated graphene sheets hybrid materials are obtained by pyrolysis or hydrolysis.

Carbon Nanotubes, Quantum Dots and Dendrimers as Potential Nanodevices for Nanotechnology Drug Delivery Systems

2013 ◽  
Vol 6 (3) ◽  
pp. 2113-2124
Author(s):  
Prashant Malik ◽  
Neha Gulati ◽  
Raj Kaur Malik ◽  
Upendra Nagaich
Keyword(s):  
Carbon Nanotubes ◽  
Drug Delivery ◽  
Quantum Dots ◽  
Self Assembly ◽  
Drug Delivery Systems ◽  
Delivery Systems ◽  
Atomic Scale ◽  
Sustained Drug Delivery ◽  
Pharmaceutical Nanotechnology ◽  
Conventional Device

Nanotechnology deal with the particle size in nanometers. Nanotechnology is ranging from extensions of conventional device physics to completely new approaches based upon molecular self assembly, from developing new materials with dimensions on the nanoscale to direct control of matter on the atomic scale. In nanotechnology mainly three types of nanodevices are described: carbon nanotubes, quantum dots and dendrimers. It is a recent technique used as small size particles to treat many diseases like cancer, gene therapy and used as diagnostics. Nanotechnology used to formulate targeted, controlled and sustained drug delivery systems. Pharmaceutical nanotechnology embraces applications of nanoscience to pharmacy as nanomaterials and as devices like drug delivery, diagnostic, imaging and biosensor materials. Pharmaceutical nanotechnology has provided more fine tuned diagnosis and focused treatment of disease at a molecular level.    

scholarly journals Self-Assembled Bimetallic Aluminum-Salen Catalyst for the Cyclic Carbonates Synthesis

Molecules ◽  
2021 ◽  
Vol 26 (13) ◽  
pp. 4097
Author(s):  
Wooyong Seong ◽  
Hyungwoo Hahm ◽  
Seyong Kim ◽  
Jongwoo Park ◽  
Khalil A. Abboud ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Self Assembly ◽  
Reaction Pathway ◽  
Kinetic Studies ◽  
Cyclic Carbonate ◽  
Reaction Conditions ◽  
Formation Reaction ◽  
X Ray ◽  
Carbonate Formation ◽  
Salen Aluminum

Bimetallic bis-urea functionalized salen-aluminum catalysts have been developed for cyclic carbonate synthesis from epoxides and CO2. The urea moiety provides a bimetallic scaffold through hydrogen bonding, which expedites the cyclic carbonate formation reaction under mild reaction conditions. The turnover frequency (TOF) of the bis-urea salen Al catalyst is three times higher than that of a μ-oxo-bridged catalyst, and 13 times higher than that of a monomeric salen aluminum catalyst. The bimetallic reaction pathway is suggested based on urea additive studies and kinetic studies. Additionally, the X-ray crystal structure of a bis-urea salen Ni complex supports the self-assembly of the bis-urea salen metal complex through hydrogen bonding.

scholarly journals Quadruple Hydrogen Bond-Containing A-AB-A Triblock Copolymers: Probing the Influence of Hydrogen Bonding in the Central Block

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4705
Author(s):  
Boer Liu ◽  
Xi Chen ◽  
Glenn A. Spiering ◽  
Robert B. Moore ◽  
Timothy E. Long
Keyword(s):  
Hydrogen Bonding ◽  
Self Assembly ◽  
Microphase Separation ◽  
Triblock Copolymers ◽  
Random Copolymer ◽  
Thermomechanical Properties ◽  
Structure Property ◽  
Scanning Calorimetry ◽  
Central Block ◽  
Quadruple Hydrogen Bonding

This work reveals the influence of pendant hydrogen bonding strength and distribution on self-assembly and the resulting thermomechanical properties of A-AB-A triblock copolymers. Reversible addition-fragmentation chain transfer polymerization afforded a library of A-AB-A acrylic triblock copolymers, wherein the A unit contained cytosine acrylate (CyA) or post-functionalized ureido cytosine acrylate (UCyA) and the B unit consisted of n-butyl acrylate (nBA). Differential scanning calorimetry revealed two glass transition temperatures, suggesting microphase-separation in the A-AB-A triblock copolymers. Thermomechanical and morphological analysis revealed the effects of hydrogen bonding distribution and strength on the self-assembly and microphase-separated morphology. Dynamic mechanical analysis showed multiple tan delta (δ) transitions that correlated to chain relaxation and hydrogen bonding dissociation, further confirming the microphase-separated structure. In addition, UCyA triblock copolymers possessed an extended modulus plateau versus temperature compared to the CyA analogs due to the stronger association of quadruple hydrogen bonding. CyA triblock copolymers exhibited a cylindrical microphase-separated morphology according to small-angle X-ray scattering. In contrast, UCyA triblock copolymers lacked long-range ordering due to hydrogen bonding induced phase mixing. The incorporation of UCyA into the soft central block resulted in improved tensile strength, extensibility, and toughness compared to the AB random copolymer and A-B-A triblock copolymer comparisons. This study provides insight into the structure-property relationships of A-AB-A supramolecular triblock copolymers that result from tunable association strengths.

scholarly journals Water diffusion in carbon nanotubes under directional electric frields: Coupling between mobility and hydrogen bonding

2020 ◽  
Vol 537 ◽  
pp. 110849
Author(s):  
Débora N. de Freitas ◽  
Bruno H.S. Mendonça ◽  
Mateus H. Köhler ◽  
Marcia C. Barbosa ◽  
Matheus J.S. Matos ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Hydrogen Bonding ◽  
Water Diffusion

Wicking-Driven Evaporation Self-Assembly of Carbon Nanotubes on Fabrics: Generating Controlled Orientational Structures

Langmuir ◽  
2020 ◽  
Vol 36 (46) ◽  
pp. 13963-13970
Author(s):  
Chenglong Li ◽  
Chuntao Lan ◽  
Min Guo ◽  
Ni Wang ◽  
Ying Ma
Keyword(s):  
Carbon Nanotubes ◽  
Self Assembly

The precise self-assembly of individual carbon nanotubes using magnetic capturing and fluidic alignment

2009 ◽  
Vol 20 (32) ◽  
pp. 325607 ◽  
Author(s):  
Joon S Shim ◽  
Yeo-Heung Yun ◽  
Michael J Rust ◽  
Jaephil Do ◽  
Vesselin Shanov ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Self Assembly
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