Control of selective adsorption behavior of Ti-binding ferritin on a SiO2 substrate by atomic-scale modulation of local surface charges

2011 ◽  
Vol 99 (26) ◽  
pp. 263701 ◽  
Author(s):  
Tatsuya Hashimoto ◽  
Kentaro Gamo ◽  
Megumi Fukuta ◽  
Bin Zheng ◽  
Nobuyuki Zettsu ◽  
...  
Keyword(s):  
Selective Adsorption ◽  
Atomic Scale ◽  
Adsorption Behavior ◽  
Surface Charges ◽  
Local Surface ◽  
Sio2 Substrate

A novel magnetic calcium silicate/graphene oxide composite material for selective adsorption of acridine orange from aqueous solutions

RSC Advances ◽  
2016 ◽  
Vol 6 (41) ◽  
pp. 34770-34781 ◽  
Author(s):  
Huan Wang ◽  
Youning Chen ◽  
Yinmao Wei
Keyword(s):  
Composite Material ◽  
Graphene Oxide ◽  
Aqueous Solutions ◽  
Acridine Orange ◽  
Calcium Silicate ◽  
Selective Adsorption ◽  
Adsorption Behavior ◽  
Oxide Composite ◽  
Oxide Composite Material

The adsorption behavior of acridine orange on magnetic calcium silicate/graphene oxide composite material.

Adsorption Behavior of GTMS on AA2024-T3 Aluminum Alloy and the Application on Surface Pretreatment

2020 ◽  
Vol 984 ◽  
pp. 31-42
Author(s):  
Bing Xue ◽  
Xue Mei Zong ◽  
Can Wang ◽  
Hua Yuan Zhang ◽  
Jing Luo
Keyword(s):  
Aluminum Alloy ◽  
Selective Adsorption ◽  
Surface Condition ◽  
Sol Gel ◽  
Adsorption Behavior ◽  
Second Phase ◽  
Surface Pretreatment ◽  
Pretreatment Method ◽  
Second Phase Particles ◽  
Sol Gel Films

Basing on the study of adsorption behavior of glycidoxypropyl-trimethoxy-silane (GTMS), pretreatment method of AA2024-T3 aluminum alloy for sol-gel films was optimized. The morphology, composition and corrosion protective performance of alloy coated with the films were investigated by using FE-SEM, EDS, AFM and EIS. The results showed that the Al matrix exhibited better ability to adsorb GTMS molecules than the second phase particles, especially at lower concentration of GTMS. Further, the 5% GTMS films cover the whole surface, but the selective adsorption behaviors still exist. It was concluded that less second phase particles and smoother surface were benefit to the sol-gel films on aluminum alloy. Depending on this conclusion, the pretreatment method for sol-gel films was optimized. The optimized surface condition conducted with 50 g•L-1 sodium hydroxide and ultrasound at 60 oC for 30 s was obtained. These samples coated with the sol-gel films revealed good anti-corrosion performance. The coverage degree of the films was up to 97.95 %.

A CO2-responsive surface with an amidine-terminated self-assembled monolayer for stimuli-induced selective adsorption

2014 ◽  
Vol 50 (30) ◽  
pp. 4003-4006 ◽  
Author(s):  
Nan Li ◽  
Larissa Thia ◽  
Xin Wang
Keyword(s):  
Selective Adsorption ◽  
Surface Charges ◽  
Self Assembled Monolayer ◽  
Reversible Transition ◽  
Bifunctional Molecule ◽  
Self Assembled

A novel amidine-based bifunctional molecule is synthesized for fabrication of a CO2-responsive surface. Controlling reversible transition of surface charges and wettability in response to stimuli of dissolved CO2 in water, the selective adsorption of hydrophobic/hydrophilic molecules can be easily achieved.

Adhesive Contact Between Atomistic Surfaces Using a Continuum Analysis

2009 ◽  
Author(s):  
Simon Medina ◽  
Daniele Dini ◽  
Andrew V. Olver
Keyword(s):  
Adhesive Contact ◽  
Atomic Scale ◽  
Local Surface ◽  
Total Surface Energy ◽  
Complete Representation ◽  
Surface Separation ◽  
Continuum Analysis ◽  
Pressure Profiles ◽  
Dynamics Simulations ◽  
Adhesive Forces

We have previously shown that, for non-adhesive conditions, an atomic scale contact can be adequately represented by a continuum analysis despite the physical shortcomings at this scale. Here we have extended the approach to include effects of the adhesive forces that become significant at this level of contact. Adhesive forces are obtained directly from the surface separation across the contact rather than through a total surface energy approach; this allows a complete representation of local surface features. The pull-off characteristics and pressure profiles have been obtained for several different atomistic AFM tip profiles and compared to those obtained from molecular dynamics simulations presented in the literature [1].

Electric charge of nanopatterned silica surfaces

2019 ◽  
Vol 21 (14) ◽  
pp. 7576-7587 ◽  
Author(s):  
H. Gokberk Ozcelik ◽  
Murat Barisik
Keyword(s):  
Surface Charge ◽  
Flat Surface ◽  
Ionic Concentration ◽  
Surface Pattern ◽  
Surface Charges ◽  
Local Surface ◽  
Silica Surfaces ◽  
Pattern Size ◽  
Theoretical Predictions ◽  
Surface Patterns

The surface charge density of a nanopatterned silica decreased at the pits but increased at the tips of surface patterns. For a case of self-repeating surface structures, the average of local surface charges becomes lower than the theoretical predictions. Our phenomenological model developed as an extension to the existing flat surface theory predicts the average surface charge on a nanopatterned surface as a function of surface pattern size, ionic concentration and pH.

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