Effects of Substrate Polarity and Chain Length on Conformational and Thermal Properties of Phosphonic Acid Self-Assembled Bilayers

Langmuir ◽  
2005 ◽  
Vol 21 (24) ◽  
pp. 11113-11118 ◽  
Author(s):  
G. N. Fontes ◽  
B. R. A. Neves
Keyword(s):  
Thermal Properties ◽  
Chain Length ◽  
Phosphonic Acid ◽  
Self Assembled

Alkylated cage silsesquioxanes: a comprehensive study of thermal properties and self-assembled structure

RSC Advances ◽  
2014 ◽  
Vol 4 (66) ◽  
pp. 34981-34986 ◽  
Author(s):  
Lei Wang ◽  
Yoshihito Ishida ◽  
Rina Maeda ◽  
Masatoshi Tokita ◽  
Teruaki Hayakawa
Keyword(s):  
Thermal Properties ◽  
Chain Length ◽  
Long Range ◽  
Aliphatic Chain ◽  
Lamellar Structures ◽  
Self Assembled ◽  
Comprehensive Study

Long-range straight ordered lamellar structures with controllable feature sizes at sub-10 nm scale are created by thoroughly choosing the aliphatic chain length and branch numbers of alkylated cage silsesquioxane.

Alkanethiol Adsorption on Platinum: Chain Length Effects on the Quality of Self-Assembled Monolayers

2011 ◽  
Vol 115 (36) ◽  
pp. 17788-17798 ◽  
Author(s):  
María Alejandra Floridia Addato ◽  
Aldo A. Rubert ◽  
Guillermo A. Benítez ◽  
Mariano H. Fonticelli ◽  
Javier Carrasco ◽  
...  
Keyword(s):  
Chain Length ◽  
Self Assembled Monolayers ◽  
Assembled Monolayers ◽  
Self Assembled ◽  
Platinum Chain ◽  
Length Effects

scholarly journals X-ray spectroscopy characterization of self-assembled monolayers of nitrile-substituted oligo(phenylene ethynylene)s with variable chain length

2012 ◽  
Vol 3 ◽  
pp. 12-24 ◽  
Author(s):  
Hicham Hamoudi ◽  
Ping Kao ◽  
Alexei Nefedov ◽  
David L Allara ◽  
Michael Zharnikov
Keyword(s):  
Chain Length ◽  
Photoelectron Spectroscopy ◽  
Self Assembled Monolayers ◽  
Phenylene Ethynylene ◽  
X Ray ◽  
Molecular Length ◽  
Assembled Monolayers ◽  
Self Assembled ◽  
Gold Thiolate

Self-assembled monolayers (SAMs) of nitrile-substituted oligo(phenylene ethynylene) thiols (NC-OPEn) with a variable chain length n (n ranging from one to three structural units) on Au(111) were studied by synchrotron-based high-resolution X-ray photoelectron spectroscopy and near-edge absorption fine-structure spectroscopy. The experimental data suggest that the NC-OPEn molecules form well-defined SAMs on Au(111), with all the molecules bound to the substrate through the gold–thiolate anchor and the nitrile tail groups located at the SAM–ambient interface. The packing density in these SAMs was found to be close to that of alkanethiolate monolayers on Au(111), independent of the chain length. Similar behavior was found for the molecular inclination, with an average tilt angle of ~33–36° for all the target systems. In contrast, the average twist of the OPEn backbone (planar conformation) was found to depend on the molecular length, being close to 45° for the films comprising the short OPE chains and ~53.5° for the long chains. Analysis of the data suggests that the attachment of the nitrile moiety, which served as a spectroscopic marker group, to the OPEn backbone did not significantly affect the molecular orientation in the SAMs.

InGaZnO Thin-Film Transistors Modified by Self-Assembled Monolayer With Different Alkyl Chain Length

2015 ◽  
Vol 36 (7) ◽  
pp. 687-689 ◽  
Author(s):  
Peng Xiao ◽  
Linfeng Lan ◽  
Ting Dong ◽  
Zhenguo Lin ◽  
Sheng Sun ◽  
...  
Keyword(s):  
Thin Film ◽  
Chain Length ◽  
Thin Film Transistors ◽  
Alkyl Chain ◽  
Alkyl Chain Length ◽  
Self Assembled Monolayer ◽  
Self Assembled

Self-Assembled Monolayers of 12-Mercaptododecylphosphonic Acid on Titania Particles; Application to the Extraction of Heavy Metals

2004 ◽  
Vol 847 ◽  
Author(s):  
Sébastien Anthérieu ◽  
Florence Brodard-Séverac ◽  
Gilles Guerrero ◽  
P. Hubert Mutin
Keyword(s):  
Heavy Metals ◽  
Chemical Analysis ◽  
Phosphonic Acid ◽  
Metal Extraction ◽  
Self Assembled Monolayers ◽  
Extraction Ability ◽  
Self Assembled Monolayer ◽  
Inorganic Hybrid ◽  
Assembled Monolayers ◽  
Self Assembled

ABSTRACTTitania particles (P25 DEGUSSA AG) were treated by a solution of 12-mercaptododecyl-phosphonic acid (MDPA) in toluene to obtain an organic-inorganic hybrid material with thiol functions at the surface. This material was characterized by chemical analysis, solid state 31P MAS NMR and FTIR spectroscopies, and XPS. Reaction of the phosphonic acid end of MDPA with the TiO2 surface led to the formation of a relatively dense and well-ordered self-assembled monolayer (SAM), with a density of about 3.9 SH functions per nm2. This material was tested for the extraction of mercury in water at pH 7, 9, and 11. Chemical analysis indicated no loss of SH functionality, even at pH 11. The best extraction results were obtained at pH 9 and 11, with a metal extraction ability between 85 and 90%.

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