A contact angle and ToF-SIMS study of SAM–thiol interactions on polycrystalline gold

2011 ◽  
Vol 257 (9) ◽  
pp. 4038-4043 ◽  
Author(s):  
Michal Tencer ◽  
Heng-Yong Nie ◽  
Pierre Berini
Keyword(s):  
Contact Angle ◽  
Tof Sims ◽  
Polycrystalline Gold ◽  
Thiol Interactions

Surface characterization by XPS, contact angle measurements and ToF-SIMS of cellulose fibers partially esterified with fatty acids

2006 ◽  
Vol 301 (1) ◽  
pp. 205-209 ◽  
Author(s):  
Carmen S.R. Freire ◽  
Armando J.D. Silvestre ◽  
Carlos Pascoal Neto ◽  
Alessandro Gandini ◽  
Pedro Fardim ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Contact Angle ◽  
Surface Characterization ◽  
Cellulose Fibers ◽  
Angle Measurements ◽  
Tof Sims ◽  
Contact Angle Measurements

scholarly journals Surface Features of Fluorapatite and Dolomite in the Reverse Flotation Process Using Sulfuric Acid as a Depressor

Minerals ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 33 ◽  
Author(s):  
Heng Zou ◽  
Qinbo Cao ◽  
Dianwen Liu ◽  
Xingcai Yu ◽  
Hao Lai
Keyword(s):  
Contact Angle ◽  
Sulfuric Acid ◽  
Secondary Ion Mass Spectrometry ◽  
Reverse Flotation ◽  
Flotation Process ◽  
Sulfate Anion ◽  
Surface Features ◽  
Tof Sims ◽  
Ftir Studies ◽  
Secondary Ion

The surface features of fluorapatite (FA, Ca5(PO4)3F) and dolomite (CaMg(CO3)2) conditioned with sulfuric acid (H2SO4) were examined through flotation experiments, contact angle tests, time-of-flight secondary ion mass spectrometry (TOF-SIMS), and FTIR experiments. The flotation and contact angle results suggested that oleate insufficiently adsorbed onto the H2SO4-treated FA surface such that the FA surface remained hydrophilic. However, using oleate as a collector, the recovery and hydrophobicity of H2SO4-treated dolomite were satisfactory. TOF-SIMS and FTIR studies indicated that sulfate anion bound with Ca atoms on the FA surface, which hindered oleate adsorption onto the FA surface. Meanwhile, sulfate anion and oleate species appeared on the dolomite surface, thereby generating a hydrophobic dolomite and also a satisfactory recovery.

Surface Chemistry of Eucalyptus Wood Pulp Fibres: Effects of Chemical Pulping

Holzforschung ◽  
2002 ◽  
Vol 56 (6) ◽  
pp. 615-622 ◽  
Author(s):  
P. Fardim ◽  
N. Durán
Keyword(s):  
Contact Angle ◽  
Surface Chemistry ◽  
Surface Coverage ◽  
Wood Pulp ◽  
Work Of Adhesion ◽  
Sodium Salts ◽  
Tof Sims ◽  
Eucalyptus Wood ◽  
Chemical Pulping ◽  
Pulp Fibres

Summary The surface chemistry of Eucalyptus grandis wood pulp fibres was investigated using the sessile drop apparent contact angle, XPS and TOF-SIMS techniques. Pulp fibres were studied using different chemical pulping conditions. The pulping affected the surface coverage of lignin and extractives, as indicated by XPS, and the work of adhesion with water, as estimated from contact angle determinations. The amount of surface lignin decreased while surface extractives and work of adhesion with water increased in relation to the amount of active alkali used in the pulping. Desorption and analysis of surface extractives by TOF-SIMS showed sterols, fatty acid calcium and sodium salts. After acetone extraction the spectra obtained by TOF-SIMS showed changes. However, calcium and sodium salts of fatty acids were still detected, indicating their resistance to solvent extraction. This resistance to extraction can affect the lignin and extractive surface coverage estimations using XPS due to the contribution of the carbon content after extraction. The extent of interference was, however, uncertain.

Argon plasma treatment of polystyrene microtiter wells. Chemical and physical characterisation by contact angle, ToF-SIMS, XPS and STM

2000 ◽  
Vol 174 (3) ◽  
pp. 287-295 ◽  
Author(s):  
John Davies ◽  
Caroline S. Nunnerley ◽  
Anneli C. Brisley ◽  
Robert F. Sunderland ◽  
John C. Edwards ◽  
...  
Keyword(s):  
Contact Angle ◽  
Plasma Treatment ◽  
Argon Plasma ◽  
Tof Sims

ToF-SIMS as a New Method to Determine the Contact Angle of Mineral Surfaces

Langmuir ◽  
2010 ◽  
Vol 26 (11) ◽  
pp. 8122-8130 ◽  
Author(s):  
Susana Brito e Abreu ◽  
Chris Brien ◽  
William Skinner
Keyword(s):  
Contact Angle ◽  
New Method ◽  
Mineral Surfaces ◽  
Tof Sims
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