Photografting as a versatile, localizable, and single-step surface functionalization of silica-based monoliths dedicated to microscale separation techniques

2013 ◽  
Vol 36 (6) ◽  
pp. 993-1001 ◽  
Author(s):  
Racha El-Debs ◽  
Vincent Dugas ◽  
Claire Demesmay
Keyword(s):  
Surface Functionalization ◽  
Single Step ◽  
Separation Techniques

scholarly journals Material- and Size-selective Separation Mechanism of Micro Particles in Frequency-modulated Dielectrophoretic Particle Chromatography

2021 ◽  
Author(s):  
Jasper Giesler ◽  
Laura Weirauch ◽  
Jorg Thöming ◽  
Michael Baune ◽  
Georg R. Pesch
Keyword(s):  
Surface Functionalization ◽  
Selective Separation ◽  
Separation Mechanism ◽  
Separation Techniques ◽  
Retention Mechanisms ◽  
Biological Particles ◽  
Micro Particles ◽  
Good Agreement

Abstract Separation of (biological) particles (<< 10 µm) according to size or other properties is an ongoing challenge in a variety of technical relevant fields. Dielectrophoresis is one method to separate particles according to a diversity of properties, and within the last decades a pool of dielectrophoretic separation techniques has been developed. However, many of them either suffer selectivity or throughput. We use simulation and experiments to investigate retention mechanisms in a novel DEP scheme, namely, frequency-modulated DEP. Results from experiments and simulation show a good agreement for the separation of binary PS particles mixtures with respect to size and more importantly, for the challenging task of separating equally sized microparticles according to surface functionalization alone. The separation with respect to size was performed using 2 µm and 3 µm sized particles, whereas separation with respect to surface functionalization was performed with 2 µm particles. The results from this study can be used to solve challenging separation tasks, for example to separate particles with distributed properties.

scholarly journals Single-step surface functionalization of polymeric nanoparticles for targeted drug delivery

Biomaterials ◽  
2009 ◽  
Vol 30 (5) ◽  
pp. 859-866 ◽  
Author(s):  
Yogesh B. Patil ◽  
Udaya S. Toti ◽  
Ayman Khdair ◽  
Linan Ma ◽  
Jayanth Panyam
Keyword(s):  
Drug Delivery ◽  
Surface Functionalization ◽  
Targeted Drug Delivery ◽  
Polymeric Nanoparticles ◽  
Single Step ◽  
Targeted Drug

scholarly journals Separating microparticles by material and size using dielectrophoretic chromatography with frequency modulation

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jasper Giesler ◽  
Laura Weirauch ◽  
Jorg Thöming ◽  
Michael Baune ◽  
Georg R. Pesch
Keyword(s):  
Surface Functionalization ◽  
Frequency Modulation ◽  
Separation Techniques ◽  
Retention Mechanisms ◽  
Biological Particles ◽  
Good Agreement

AbstractSeparation of (biological) particles ($$\ll {10}~{\upmu }\text {m}$$ ≪ 10 μ m ) according to size or other properties is an ongoing challenge in a variety of technical relevant fields. Dielectrophoresis is one method to separate particles according to a diversity of properties, and within the last decades a pool of dielectrophoretic separation techniques has been developed. However, many of them either suffer selectivity or throughput. We use simulation and experiments to investigate retention mechanisms in a novel DEP scheme, namely, frequency-modulated DEP. Results from experiments and simulation show a good agreement for the separation of binary PS particles mixtures with respect to size and more importantly, for the challenging task of separating equally sized microparticles according to surface functionalization alone. The separation with respect to size was performed using 2 $${\upmu }$$ μ m and 3 $${\upmu }$$ μ m sized particles, whereas separation with respect to surface functionalization was performed with 2 $${\upmu }$$ μ m particles. The results from this study can be used to solve challenging separation tasks, for example to separate particles with distributed properties.

scholarly journals Functionalization of Single-Walled Carbon Nanotubes with End-Capped Polystyrene via a Single-Step Diels–Alder Cycloaddition

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1169
Author(s):  
Maria-Malvina Stathouraki ◽  
Christos Pantazidis ◽  
Emmanouil Mygiakis ◽  
Apostolos Avgeropoulos ◽  
Georgios Sakellariou
Keyword(s):  
Carbon Nanotubes ◽  
Surface Functionalization ◽  
Cycloaddition Reaction ◽  
Single Walled Carbon Nanotubes ◽  
Terminal Group ◽  
Single Step ◽  
Diels Alder ◽  
Polymer Chains ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

A facile, single-step, [4+2] Diels–Alder cycloaddition reaction for the surface functionalization of single-walled carbon nanotubes (SWNTs) with end-capped polystyrene chains is presented. The thermal cycloaddition reaction took place at high temperature (~230 °C) without any catalyst between the sp2 network of carbon nanotubes, which acted as dienophile, and the diphenylethylene cyclobutene (DPE-CB) terminal group of the polystyrene chain. Anionic polymerization was employed for the synthesis of the polystyrene macromolecule, and successful and quantitative end-capping reaction with the DPE-CB molecule was confirmed by matrix-assisted laser desorption/ionization time of flight mass spectroscopy. Thermogravimetric analysis revealed the wt % of the grafted macromolecule on the CNT surface as well as the grafting density of the polymer chains on the SWNTs (0.027 chains nm−2). Direct evidence for the surface functionalization and the presence of thin polystyrene film was obtained by transmission electron microscopy (TEM) and by atomic force microscopy (AFM).

V884: Demonstration of a Novel Single-Step Percutaneous Access Sheath for Nephrostolithotomy: A Video Presentation

2005 ◽  
Vol 173 (4S) ◽  
pp. 240-240
Author(s):  
Premal J. Desai ◽  
David A. Hadley ◽  
Lincoln J. Maynes ◽  
D. Duane Baldwin
Keyword(s):  
Single Step ◽  
Video Presentation ◽  
Percutaneous Access ◽  
Access Sheath
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