Self-Reinforcement of PNIPAm–Laponite Nanocomposite Gels Investigated by Atom Force Microscopy Nanoindentation

2012 ◽  
Vol 45 (17) ◽  
pp. 7220-7227 ◽  
Author(s):  
Cuixia Lian ◽  
Zemin Lin ◽  
Tao Wang ◽  
Weixiang Sun ◽  
Xinxing Liu ◽  
...  
Keyword(s):  
Force Microscopy ◽  
Nanocomposite Gels ◽  
Atom Force Microscopy

Correction for Self-Reinforcement of PNIPAm–Laponite Nanocomposite Gels Investigated by Atom Force Microscopy Nanoindentation

2012 ◽  
Vol 45 (19) ◽  
pp. 8117-8117
Author(s):  
Cuixia Lian ◽  
Zemin Lin ◽  
Tao Wang ◽  
Weixiang Sun ◽  
Xinxing Liu ◽  
...  
Keyword(s):  
Force Microscopy ◽  
Nanocomposite Gels ◽  
Atom Force Microscopy

Characterization of the porous nature of a phthalocyanine derivative with axial ligation designed to prevent aggregation

2010 ◽  
Vol 14 (05) ◽  
pp. 389-396
Author(s):  
Carl A. Barker ◽  
Alan Massey ◽  
Aidan Rhodes ◽  
Martin R. Bryce ◽  
Ritu Kataky
Keyword(s):  
Force Microscopy ◽  
Selective Transport ◽  
Electrode Surfaces ◽  
Axial Ligation ◽  
Nanoporous Films ◽  
Atom Force Microscopy ◽  
Solvent Cast ◽  
Complementary Techniques

Judiciously designed phthalocyanines (Pcs), such as silicon-Pc bis(3,5-diphenyl)benzoate (1c), with axial substituents which prevent aggregation, can self-assemble to form ordered nanoporous films on electrode surfaces. In this paper, complementary techniques such as Scanning Kelvin Nanoprobe (SKN) microscopy, Atom Force Microscopy (AFM) and electrochemical measurements are used to demonstrate that films formed by silicon-Pc bis(3,5-diphenyl)benzoate allow size- and charge- selective transport of probe molecules through well-defined intermolecular cavities. In contrast, the analogs silicon-Pc bis(4-tert-butylbenzoate) (1a) and silicon-Pc bis(3-thienyl)acetate (1b) have different film morphologies when solvent-cast in the same manner and block the electrode surface. The role of the different axial substituents in orienting the molecules on the substrate is discussed.

AFM for Preparing Si Masters in Soft Lithography

2006 ◽  
Vol 315-316 ◽  
pp. 762-765 ◽  
Author(s):  
Xiao Li Zhao ◽  
Shen Dong ◽  
Ying Chun Liang ◽  
T. Sun ◽  
Yong Da Yan
Keyword(s):  
Soft Lithography ◽  
Si Substrate ◽  
Pdms Stamp ◽  
Force Microscopy ◽  
Si Substrates ◽  
Technical Community ◽  
Morphology Analysis ◽  
Afm Imaging ◽  
Atom Force Microscopy

Atom Force Microscopy (AFM) can be employed to create surfaces in Si substrate with recessed features. The resulting patterns can serve as masters to make the required elastomeric stamps for soft lithography. Morphology analysis of patterned features on Si substrate and polydimethylsiloxane (PDMS) stamp by AFM imaging confirms that pattern can be successfully transferred from Si substrates to PDMS stamps. It is shown that this method for creating masters can be performed with an AFM, making this method particularly straightforward, economical and accessible to a large technical community that are provided with AFM for measurement.

The applications of atom force microscopy in polymer studies

Polimery ◽  
1999 ◽  
Vol 44 (09) ◽  
pp. 571-578 ◽  
Author(s):  
MARIAN ZENKIEWICZ
Keyword(s):  
Force Microscopy ◽  
Atom Force Microscopy

Fabrication of Highly Ordered Two-Dimensional Graphene Arrays on Patterned Substrate

2014 ◽  
Vol 809-810 ◽  
pp. 231-236
Author(s):  
Meng Jie Chang ◽  
Jun Liu ◽  
Ying Li
Keyword(s):  
Self Assembly ◽  
Two Dimensional ◽  
High Concentration ◽  
Contact Printing ◽  
Patterned Substrate ◽  
Force Microscopy ◽  
Saturated Water ◽  
Straightforward Method ◽  
Atom Force Microscopy ◽  
Wetting Property

We report a facial and straightforward method to fabricate highly ordered two-dimensional graphene arrays. A monolayer molecule pattern with alternative hydrophilic/hydrophobic wetting property was first formed by using micro-contact printing (μCP) and self-assembly techniques. Water droplets were condensed on the hydrophilic areas under saturated water atmosphere, which could be used to construct the ordered graphene arrays. The optical microscopy and atom force microscopy results indicate that ring and porous arrays of graphene can be obtained with low and high concentration of graphene solutions, respectively. Without the water droplet template, graphene patterns with square structure were produced.

Study on UV-Curable Hybrid Adhesives with Adjustable Refractive Index

2012 ◽  
Vol 549 ◽  
pp. 639-642
Author(s):  
Xu Ping Yang ◽  
Xiao Hong Tang ◽  
Wen Bin Yang ◽  
Jing Wei Liu
Keyword(s):  
Refractive Index ◽  
Coupling Agent ◽  
Average Diameter ◽  
Titanium Tetraisopropoxide ◽  
Uv Curable ◽  
Force Microscopy ◽  
Cationic Monomer ◽  
Atom Force Microscopy ◽  
20 Nm ◽  
Tio2 Nanostructures

UV-curable cationic hybrid adhesives containing TiO2 nanostructures were prepared by using 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexanecarboxylate (CE) as UV-curable cationic monomer, triphenylsulfonium hexafluorophosphate salt (PI-432) as photoinitiator and titanium-tetraisopropoxide (TIP) as inorganic precursor. Morphology of the UV-cured hybrid adhesives was characterized by atom force microscopy (AFM). The effect of TIP content on refractive index was studied. The results showed that TiO2 nanostructures, the average diameter of which was 20 nm or so, could be uniformly dispersed in hybrid adhesives in presence of 5 wt% 3-glycidoxypropyltrimethoxysilane (GPTS) coupling agent. And the refractive index of hybrid adhesives could be controllably adjusted from 1.5019 to 1.5449 with the change of TIP content. At the same time, the bonding strength of hybrid adhesives were also improved.

scholarly journals Tensile and Surface Mechanical Properties of Polyethersulphone (PES) and Polyvinylidene Fluoride (PVDF) Membranes

2018 ◽  
Vol 48 (3) ◽  
pp. 85-99 ◽  
Author(s):  
Rumiana Kotsilkova ◽  
Irena Borovanska ◽  
Peter Todorov ◽  
Evgeni Ivanov ◽  
Dzhihan Menseidov ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Test ◽  
Hollow Fiber ◽  
Polyvinylidene Fluoride ◽  
Mechanical Performance ◽  
Polymer Membranes ◽  
Application Performance ◽  
Force Microscopy ◽  
Flat Sheet ◽  
Atom Force Microscopy

Abstract Mechanical properties of polymer membranes (strength, hardness and elasticity) are very important parameters for the application performance, e.g. water purification. We study the tensile and surface mechanical properties of hollow fiber and flat sheets mat membranes based on PES and PVDF polymers. Tensile test, nanoindentation and atom force microscopy are used for characterization at macro and nanoscale. Mechanical properties are correlated with pore structure of membranes. The reinforced PVDF HF hollow fiber membranes show 30-fold higher stiffness and 3-fold higher hardness compared to non-reinforced PES HF. Surface mechanical properties of flat sheet membranes are strongly improved by decreasing the pore size. The smoothest surface with 100–200 nm roughness has the best surface mechanical performance obtained by nanoindentation.

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