Contact Angles of Aqueous Solutions on Copper Surfaces Bearing Self-Assembled Monolayers

2001 ◽  
Vol 78 (3) ◽  
pp. 345 ◽  
Author(s):  
Anthony C. Jones ◽  
Vincent S. J. Craig ◽  
Tim J. Senden
Keyword(s):  
Aqueous Solutions ◽  
Contact Angles ◽  
Self Assembled Monolayers ◽  
Copper Surfaces ◽  
Assembled Monolayers ◽  
Self Assembled

Self-Assembled Monolayers of Schiff Bases on Copper Surfaces

CORROSION ◽  
2001 ◽  
Vol 57 (3) ◽  
pp. 195-201 ◽  
Author(s):  
Z. Quan ◽  
X. Wu ◽  
S. Chen ◽  
S. Zhao ◽  
H. Ma
Keyword(s):  
Schiff Bases ◽  
Self Assembled Monolayers ◽  
Copper Surfaces ◽  
Assembled Monolayers ◽  
Self Assembled

scholarly journals An impedance investigation of corrosion protection of copper by self-assembled monolayers of alkanethiols in aqueous solution

2004 ◽  
Vol 69 (10) ◽  
pp. 791-805 ◽  
Author(s):  
Guiyan Li ◽  
Houyi Ma ◽  
Yongli Jiao ◽  
Shrnhao Chen
Keyword(s):  
Equivalent Circuit ◽  
Corrosion Protection ◽  
Electrochemical Impedance ◽  
Copper Substrate ◽  
Self Assembled Monolayers ◽  
Copper Surfaces ◽  
Hydrophobic Barrier ◽  
Assembled Monolayers ◽  
Covered Electrodes ◽  
Self Assembled

Self-assembled monolayers (SAMs) of three n-alkanethiols, 1-octadecanethiol (C18SH), 1-dodecanethiol (C12SH), and 1-hexanethiol (C6SH), were formed on fresh, oxide- free copper surfaces obtained by HNO3 etching. The corrosion protection abilities of the three alkanethiol SAM s were evaluated in 0.2 mol cm-3 NaCl, 0.2 mol cm-3 HCl and 0.2 mol dm?3 H2SO4 solutions using the electrochemical impedance spectroscopy (EIS) method. The SAMs act as a hydrophobic barrier layer, which effectively prevents the copper substrate from contacting corrosive ions, thereby inhibiting corrosion of the copper to a considerable degree. A general equivalent circuit for the SAM-covered electrodes was proposed, bymeans of which the impedance behavior of the electrodes was interpreted and the corresponding electrochemical parameters were acquired. In addition, the quality of the SAMs and development of defects in the SAMs were also been evaluated based on the equivalent circuit. The dependence of the capacitance of the SAMs on the applied potentials was used to determine the stability of the SAMs at the applied potentials.

scholarly journals Use of Self-Assembled Monolayers of Different Wettabilities To Study Surface Selection and Primary Adhesion Processes of Green Algal (Enteromorpha) Zoospores

2000 ◽  
Vol 66 (8) ◽  
pp. 3249-3254 ◽  
Author(s):  
Maureen E. Callow ◽  
J. A. Callow ◽  
Linnea K. Ista ◽  
Sarah E. Coleman ◽  
Aleece C. Nolasco ◽  
...  
Keyword(s):  
Contact Angle ◽  
Photoelectron Spectroscopy ◽  
Contact Angles ◽  
Self Assembled Monolayers ◽  
Use Of Self ◽  
Oh Groups ◽  
X Ray ◽  
Green Algal ◽  
Assembled Monolayers ◽  
Self Assembled

ABSTRACT We investigated surface selection and adhesion of motile zoospores of a green, macrofouling alga (Enteromorpha) to self-assembled monolayers (SAMs) having a range of wettabilities. The SAMs were formed from alkyl thiols terminated with methyl (CH3) or hydroxyl (OH) groups or mixtures of CH3- and OH-terminated alkyl thiols and were characterized by measuring the advancing contact angles and by X-ray photoelectron spectroscopy. There was a positive correlation between the number of spores that attached to the SAMs and increasing contact angle (hydrophobicity). Moreover, the sizes of the spore groups (adjacent spores touching) were larger on the hydrophobic SAMs. Video microscopy of a patterned arrangement of SAMs showed that more zoospores were engaged in swimming and “searching” above the hydrophobic sectors than above the hydrophilic sectors, suggesting that the cells were able to “sense” that the hydrophobic surfaces were more favorable for settlement. The results are discussed in relation to the attachment of microorganisms to substrata having different wettabilities.

Self-Assembled Monolayers of Alkanethiols on Oxidized Copper Surfaces

2000 ◽  
Vol 104 (10) ◽  
pp. 2273-2277 ◽  
Author(s):  
Myung M. Sung ◽  
Kiwhan Sung ◽  
Chang G. Kim ◽  
Sun S. Lee ◽  
Yunsoo Kim
Keyword(s):  
Self Assembled Monolayers ◽  
Copper Surfaces ◽  
Assembled Monolayers ◽  
Self Assembled
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