Self Assembled Monolayers and Carbon Nanotubes: A Significant Tool’s for Modification of Electrode Surface

A compromising and well-organized model system is needed for investigating the molecular behaviour of biomolecules as many transduction processes and biological recognition occur at biological surfaces. The application of techniques in interfacial surfaces like one molecule thick films has made a feasible and significant tool for modern scientific studies. Self Assembling Monolayers (SAMs) technology is a very useful means for producing monomolecular films of various biological molecules on different substrates. Carbon Nanotubes (CNTs) have length-to-diameter aspect ratio property which provides a large surface-to-volume ratio, making it an intensely capable material for biomolecular attachments. The incorporation of Carbon Nanotubes (CNTs) with biological systems forming functional assemblies has shown an explored area of research. Organo-sulfur mainly alkanethiol (CnH2n+1–SH) molecules get adsorbed onto CNTs. This phenomenon has grabbed a lot of attention because Self Assembling Monolayers (SAMs) of organo-sulfur compound acts as an example system for understanding important chemical, physical or biological processes.

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Three-Dimensional Hexagonal Close-Packed Superlattices of Passivated Ag Nanocrystals

Microscopy and Microanalysis ◽

10.1017/s1431927600009041 ◽

1997 ◽

Vol 3 (S2) ◽

pp. 431-432

Author(s):

S. A. Harfenist ◽

Z. L. Wang ◽

R. L. Whetten ◽

I. Vezmar ◽

M. M. Alvarez ◽

...

Keyword(s):

Carbon Film ◽

Three Dimensional ◽

Structure Characterization ◽

Self Assembled Monolayers ◽

Hexagonal Close Packed ◽

Self Assembling ◽

Transmission Electron ◽

Assembled Monolayers ◽

High Resolution Tem ◽

Nanocrystal Superlattices

Silver nanocrystals passivated by dodecanethiol self-assembled monolayers were produced using an aerosol technique described in detail elsewhere [1]. Self-assembling passivated nanocrystal-superlattices (NCS's) involve self-organization into monolayers, thin films, and superlattices of size-selected nanoclusters encapsulated in a protective compact coating [2,3,4,5,6,7]. We report the preparation and structure characterization of three-dimensional (3-D) hexagonal close-packed Ag nanocrystal supercrystals from Ag nanocrystals of ˜4.5 nm in diameters. The crystallography of the superlattice and atomic core lattices were determined using transmission electron microscopy (TEM) and high-resolution TEM.SEM was used to image the nanocrystal superlattices formed on an amorphous carbon film of an TEM specimen grid (fig. la). The superlattice films show well shaped, sharply faceted, triangular shaped sheets. Figure lb depicts numerous Ag nanocrystal aggregates uniformly distributed over the imaging region. Inset in this figure is an enlargement of the boxed region at the edge of a supercrystal typifying the ordered nanocrystal packing.

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Synthesis of high quality single-walled carbon nanotubes via a catalytic layer reinforced by self-assembled monolayers

Thin Solid Films ◽

10.1016/j.tsf.2013.07.030 ◽

2013 ◽

Vol 545 ◽

pp. 50-55 ◽

Cited By ~ 6

Author(s):

Prashanta Dhoj Adhikari ◽

Wooseok Song ◽

Myoung-Jun Cha ◽

Chong-Yun Park

Keyword(s):

Carbon Nanotubes ◽

Single Walled Carbon Nanotubes ◽

Self Assembled Monolayers ◽

Catalytic Layer ◽

High Quality ◽

Single Walled Carbon ◽

Assembled Monolayers ◽

Self Assembled ◽

Walled Carbon Nanotubes

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Functionalization of gold-coated carbon nanotubes with self-assembled monolayers of thiolates

Journal of Materials Science ◽

10.1007/s10853-011-6194-0 ◽

2011 ◽

Vol 47 (7) ◽

pp. 3463-3467 ◽

Cited By ~ 6

Author(s):

Michał Cegłowski ◽

Urszula Narkiewicz ◽

Iwona Pełech ◽

Grzegorz Schroeder

Keyword(s):

Carbon Nanotubes ◽

Self Assembled Monolayers ◽

Assembled Monolayers ◽

Self Assembled ◽

Coated Carbon

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Synthesis, Self-Assembling and Redox Properties of 2-[(ω-Sulfanylalkyl)amino]-1,4-naphthoquinones

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc20061383 ◽

2006 ◽

Vol 71 (9) ◽

pp. 1383-1391 ◽

Cited By ~ 6

Author(s):

Maryte Kažemekaite ◽

Vilma Railaite ◽

Arunas Bulovas ◽

Zita Talaikyte ◽

Gediminas Niaura ◽

...

Keyword(s):

Reduction Process ◽

Spectroscopic Studies ◽

Self Assembled Monolayers ◽

Raman Spectroscopic ◽

Self Assembling ◽

Electrochemical Parameters ◽

Surface Enhanced ◽

Assembled Monolayers ◽

Surface Enhanced Raman ◽

Group Form

The newly synthesized 1,4-naphthoquinones linked via nitrogen atom to a short chain with terminal sulfanyl group form self-assembled monolayers on gold. The main electrochemical parameters of the monolayers were determined by cyclic voltammetry. Combined voltammetric and in situ Fourier-transform surface-enhanced Raman spectroscopic studies of the Au electrode modified with the title compounds clearly evidence that naphthoquinone group transforms into naphthalenediol during a reduction process.

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Self-assembly of biomolecules at surfaces characterized by NEXAFS

Canadian Journal of Chemistry ◽

10.1139/v07-079 ◽

2007 ◽

Vol 85 (10) ◽

pp. 793-800 ◽

Cited By ~ 10

Author(s):

Xiaosong Liu ◽

Fan Zheng ◽

A Jürgensen ◽

V Perez-Dieste ◽

D Y Petrovykh ◽

...

Keyword(s):

Surface Science ◽

Self Assembly ◽

Ribonuclease A ◽

Polarization Dependence ◽

Biological Molecules ◽

Self Assembled Monolayers ◽

Peptide Bonds ◽

Molecular Adsorbates ◽

Dna Oligonucleotides ◽

Assembled Monolayers

Surface science has made great strides towards tailoring surface properties via self-assembly of nanoscale molecular adsorbates. It is now possible to functionalize surfaces with complex biomolecules such as DNA and proteins. This brief overview shows how NEXAFS (near edge X-ray absorption fine structure spectroscopy) can be used to characterize the assembly of biological molecules at surfaces in atom- and orbital-specific fashion. To illustrate the range of applications, we begin with simple self-assembled monolayers (SAMs), proceed to SAMs with customized terminal groups, and finish with DNA oligonucleotides and Ribonuclease A, a small protein containing 124 amino acids. The N 1s absorption edge is particularly useful for characterizing DNA and proteins because it selectively interrogates the π* orbitals in nucleobases and the peptide bonds in proteins. Information about the orientation of molecular orbitals is obtained from the polarization dependence. Quantitative NEXAFS models explain the polarization dependence in terms of molecular orientation and structure.Key words: NEXAFS, bio-interfaces, ribonuclease A, immobilization, orientation.

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Self-assembled monolayers of pyridylthio-functionalized carbon nanotubes used as a support to immobilize cytochrome c

Nanoscale Research Letters ◽

10.1186/1556-276x-8-63 ◽

2013 ◽

Vol 8 (1) ◽

pp. 63 ◽

Cited By ~ 1

Author(s):

Qing Sun ◽

Jiang Liu ◽

Hong-Xiang Huang ◽

Meng Chen ◽

Dong-Jin Qian

Keyword(s):

Carbon Nanotubes ◽

Cytochrome C ◽

Self Assembled Monolayers ◽

Functionalized Carbon Nanotubes ◽

Assembled Monolayers ◽

Self Assembled

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Synthesis of Silver Nanoparticles with Monovalently Functionalized Self-Assembled Monolayers

Australian Journal of Chemistry ◽

10.1071/ch11429 ◽

2012 ◽

Vol 65 (3) ◽

pp. 275 ◽

Cited By ~ 10

Author(s):

P. Free ◽

D. Paramelle ◽

M. Bosman ◽

J. Hobley ◽

D. G. Fernig

Keyword(s):

Silver Nanoparticles ◽

Specific Binding ◽

Nitrilotriacetic Acid ◽

Surface Reactivity ◽

Biological Molecules ◽

Peptide Sequence ◽

Self Assembled Monolayers ◽

Ligand Shell ◽

Assembled Monolayers ◽

The Stability

The importance of having nanoparticles that are soluble, stable, and that have no non-specific binding is often overlooked, but essential for their use in biology. This is particularly prominent with silver nanoparticles that are susceptible to the effects of aggregation and metal-surface reactivity. Here we use a combination of several small peptidols and short alkanethiol ethylene glycol ligands to develop a ligand shell that is reasonably resistant to ligand exchange and non-specific binding to groups common in biological molecules. The stability of the nanoparticles is not affected by the inclusion of a functional ligand, which is done in the same preparative step. The stoichiometry of the nanoparticles is controlled, such that monofunctional silver nanoparticles can be obtained. Two different sets of nanoparticles, functionalized with either Tris-nitrilotriacetic acid or a hexa-histidine peptide sequence, readily form dimers/oligomers, depending on their stoichiometry of functionalization.

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Selective choline biosensors based on choline oxidase co-immobilized into self-assembled monolayers on micro-chips at low potential

Analytical Methods ◽

10.1039/c5ay02456k ◽

2015 ◽

Vol 7 (22) ◽

pp. 9426-9434 ◽

Cited By ~ 8

Author(s):

Mohammed M. Rahman ◽

Abdullah M. Asiri

Keyword(s):

Choline Oxidase ◽

Biological Molecules ◽

Selective Recognition ◽

Self Assembled Monolayers ◽

Buffer System ◽

Assembled Monolayers ◽

Self Assembled

The fabricated choline-biosensor exhibits excellent specific and selective recognition for selected biological molecules coexisting with interferents in a buffer system at low potential.

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