Synthesis and Characterization of Polydiacetylene Films and Nanotubes

Gatebe, Erastus; Herron, Hayley; Zakeri, Rashid; Rajasekaran, Pradeep Ramiah; Aouadi, Samir; Kohli, Punit

doi:10.1021/la801948z

Cited by 15 publications

(14 citation statements)

References 55 publications

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“…The symmetric and asymmetric stretching of CH 2 bands was present at 2 855 and 2 926 cm À1 . The CH 2 stretching band positions suggests that the CH 2 in the alkyl chains are disorganized, contrary to the reported CH 2 stretching bands at 2 848 and 2 915 cm À1 in crystalline forms [30][31] or in films and vesicles, where polydiacetylenes are highly organized and polymerized with a blue color.…”

Section: Uv-vis Spectroscopycontrasting

confidence: 80%

Structure and Behavior of Polydiacetylene‐Based Micelles

Perino¹,

Klymchenko²,

Morère³

et al. 2010

Macro Chemistry & Physics

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The effect of photopolymerization on the structure, stability and encapsulation properties of polydiacetylene micelles containing nitrilotriacetic acid head groups are investigated. Micellar nanostructures of 7–10 nm diameter are identified that are invariant after polymerization. In the micelles, the polymerized ene‐yne chains are much shorter than in planar lipid membranes. SANS confirmed the presence of a monodisperse population of small particles before and after polymerization. It is shown that the CMC decreases manifold after micelle photopolymerization, indicating that it stabilizes the micellar structure. After photopolymerization, these micelles preserved their strong ability to solubilize a hydrophobic pigment, which makes them potentially interesting as drug delivery vehicles. magnified image

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Section: Uv-vis Spectroscopycontrasting

confidence: 80%

Structure and Behavior of Polydiacetylene‐Based Micelles

Perino¹,

Klymchenko²,

Morère³

et al. 2010

Macro Chemistry & Physics

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“…In combination with zirconium-carboxylate interlayer chemistry, UV irradiation of the DCDA-modified samples led to the formation of polymerized-DCDA multilayer nanotubes. 33 …”

Section: Template Synthesis Of One-dimensional Soft Nanostructuresmentioning

confidence: 99%

Layer-by-layer assemblies in nanoporous templates: nano-organized design and applications of soft nanotechnology

Azzaroni

Lau

2011

Soft Matter

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The synergistic combination of layer-by-layer (LbL) assembly and nanoporous membrane templating has greatly facilitated the creation of complex and functional nanotubular structures. The approach takes advantage of both the new properties conferred by assembling diverse LbL building blocks and the tight dimensional control offered by nanotemplating to enable new functionalities that arise from the highly anisotropic “one-dimensional” LbL-nanotube format. In this review, we aim to convey the key developments and provide a current snap-shot of such templated LbL nanoarchitectures. We survey recent developments that have enabled the assembly of polymers, biomolecules and inorganic nanoparticles “à la carte”, via electrostatic, covalent and specific (bio)recognition interactions. We also discuss the emerging mechanistic understanding of the LbL assembly process within the nanopore environment. Finally, we present a diverse range of LbL nanotube “devices” to illustrate the versatility of the nanotemplated LbL toolbox for generating functional soft nanotechnology.

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“…The original protocol 18 was modified by replacing the silane with fluorosilane to fit our needs. A fluorosilane solution composed of 95% (v/v) ethanol/water, 4% (v/v) tridecafluoro-1,1,1,2-tetrahydrooctyl)triethoxysilane and 1% (v/v) acetic acid was used as a releasing agent in our experiments.…”

Section: Methodsmentioning

confidence: 99%

Fabrication and characterization of non-linear parabolic microporous membranes

Rajasekaran¹,

Sharifi²,

Wolff³

et al. 2015

Journal of Membrane Science

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Large scale fabrication of non-linear microporous membranes is of technological importance in many applications ranging from separation to microfluidics. However, their fabrication using traditional techniques is limited in scope. We report on fabrication and characterization of non-linear parabolic micropores (PMS) in polymer membranes by utilizing flow properties of fluids. The shape of the fabricated PMS corroborated well with simplified Navier-Stokes equation describing parabolic relationship of the form L – t1/2. Here, L is a measure of the diameter of the fabricated micropores during flow time (t). The surface of PMS is smooth due to fluid surface tension at fluid-air interface. We demonstrate fabrication of PMS using curable polydimethylsiloxane (PDMS). The parabolic shape of micropores was a result of interplay between horizontal and vertical fluid movements due to capillary, viscoelastic, and gravitational forces. We also demonstrate fabrication of asymmetric “off-centered PMS” and an array of PMS membranes using this simple fabrication technique. PMS containing membranes with nanoscale dimensions are also possible by controlling the experimental conditions. The present method provides a simple, easy to adopt, and energy efficient way for fabricating non-linear parabolic shape pores at microscale. The prepared parabolic membranes may find applications in many areas including separation, parabolic optics, micro-nozzles / -valves / -pumps, and microfluidic and microelectronic delivery systems.

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Synthesis and Characterization of Polydiacetylene Films and Nanotubes

Cited by 15 publications

References 55 publications

Structure and Behavior of Polydiacetylene‐Based Micelles

Structure and Behavior of Polydiacetylene‐Based Micelles

Layer-by-layer assemblies in nanoporous templates: nano-organized design and applications of soft nanotechnology

Fabrication and characterization of non-linear parabolic microporous membranes

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