Cyclodextrin directed self-assembly of TiO2 nanoparticles

Yoon, Sungkwon; Nichols, William T.

doi:10.1016/j.apsusc.2013.08.086

Cited by 9 publications

(9 citation statements)

References 29 publications

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“…[7][8][9] Shortly after, Boué and co-workers designed aromatic bisurea functionalized PEG which self-assemble in a wide range of solvents into long rigid cylinders, which are in dynamic equilibrium with their unimers. 10 Beyond these examples, numerous other supramolecular motifs, such as ureido-pyrimidinone, 12 peptides, [13][14][15] cyclodextrins 16 or benzenetricarboxamide 17,18 have been used to direct the assembly of synthetic water-soluble macromolecules into cylindrical structures. In most of the studies, low molar mass polymers were used, in particular oligo(ethylene glycol)s, and their functionalization by the sticker units was achieved by post-polymerization strategies.…”

Section: Introductionmentioning

confidence: 99%

Bisurea-Functionalized RAFT Agent: A Straightforward and Versatile Tool toward the Preparation of Supramolecular Cylindrical Nanostructures in Water

et al. 2018

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Bis-ureahydrophilic polymer sticker RAFT polymerizationTTC unit Hydrogen bonding unit , , , … µm ABSTRACTWe report a versatile and simple approach to produce cylindrical micelles by the direct dissolution of polymers in water. The developed strategy relies on a RAFT agent functionalized by a bisurea sticker that allowed to synthesize a series of α-bisurea functionalized poly(N,Ndimethylacrylamide) (PDMAc), poly(acrylic acid) (PAA), polyacrylamide (PAM) and poly(2-(N,N-dimethylamino)ethyl acrylate) (PDMAEA) with number-average degrees of polymerization (DPn) varying from about 10 to 50. Their spontaneous self-assembly in water was studied by electron microscopy (cryo-TEM), neutron scattering (SANS) and calorimetry (ITC) analyses that showed that long cylindrical micelles are spontaneously formed in water.The crucial role of the bisurea sticker end-groups was established by comparison with the corresponding bisurea-free model polymers that only formed spherical micelles. Finally, we have shown that it is possible to trigger reversibly the assembly/disassembly of the nanofibers by pH changes. AUTHOR INFORMATIONCorresponding authors *

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Section: Introductionmentioning

confidence: 99%

Bisurea-Functionalized RAFT Agent: A Straightforward and Versatile Tool toward the Preparation of Supramolecular Cylindrical Nanostructures in Water

et al. 2018

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“…Gel L also showed δ s CH 2 and δ s CH bands of β-CD at 1457.9 and 1337.2 cm −1 [40], where the latter is overlapped with an OH bending peak of PEG and β-CD [35,41]. As shown in Fig.…”

Section: Ftir Analysismentioning

confidence: 79%

“…In addition, this may suggest that β-CD rings were not threaded onto PEG and Gel L probably formed through a simple complexation. Furthermore, the δOH of Gel L at 1337.2 cm −1 [41] shifted to 1338.2 cm −1 when the gel was mixed with DS. This indicated that the OH group of PEG or β-CD may be involved in the interaction probably via an ionic hydrogen bond [38] with a COO − functional group of the DS molecule.…”

Section: Ftir Analysismentioning

confidence: 95%

Characterization of supramolecular gels based on β-cyclodextrin and polyethyleneglycol and their potential use for topical drug delivery

Klaewklod

Tantishaiyakul

Hirun

et al. 2015

Materials Science and Engineering: C

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“…CD-TiO 2 nanofibers prepared by Yoon and Nichols displayed a hierarchical structure of nanoparticles interconnected into a 3D network as demonstrated in Figure 12. The 3D structure was found to have high surface area and large porosity [72,73]. CD-TiO 2 composites have been found to be stable over a wide range of pH.…”

Section: Nanofibers Incorporated With Nanoparticlesmentioning

confidence: 98%

“…These two techniques give critical details on the size, size distribution and alignment of fibers as well as the nature of the nanofiber or membrane surfaces. These microscopic techniques are mostly used in the analytic investigation of nanofibers and membranes because of their capability of imaging at high resolutions [11,43,49,69,73,77].…”

Section: Microscopic Techniquesmentioning

confidence: 99%

Cyclodextrin-Based Nanofibers and Membranes: Fabrication, Properties and Applications

Chabalala¹,

Seshabela²,

Hulle³

et al. 2018

Cyclodextrin - A Versatile Ingredient

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Cyclodextrin (CD)-based electrospun nanofibers have become critical role players in the water treatment arena due to their high porosities, small diameters, high surface area-tovolume ratio and other unique properties they exhibit. Investigations demonstrate that nanofibers containing CD molecules can be facially blended with other polymeric species and/or photocatalytic and magnetic nanoparticles to enhance their rates of adsorption, inclusion complexation and selective photodegradation. These properties make them excellent candidates for the removal of water pollutants. On the other hand, the electrospinning process has become the method of choice in the fabrication of various types of CD nanofibrous mats due to its versatility, cost-effectiveness and its potential for the mass production of uniform nanofibers. CDs and CD-derivatives have also found application in membrane technologies, particularly in mixed matrix and thin film composite membranes. CD-blended membranes display improved performances in terms of selectivity, rejection, permeation and flux with reduced fouling propensities and can be used for drinking water purification and removal of emerging micropollutants. This chapter critically reviews CD-based electrospun nanofibers looking at their production, characterization methods and various applications. The use of CDs as membrane materials and how they can be fully explored in water treatment are also investigated.

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Cyclodextrin directed self-assembly of TiO2 nanoparticles

Cited by 9 publications

References 29 publications

Bisurea-Functionalized RAFT Agent: A Straightforward and Versatile Tool toward the Preparation of Supramolecular Cylindrical Nanostructures in Water

Bisurea-Functionalized RAFT Agent: A Straightforward and Versatile Tool toward the Preparation of Supramolecular Cylindrical Nanostructures in Water

Characterization of supramolecular gels based on β-cyclodextrin and polyethyleneglycol and their potential use for topical drug delivery

Cyclodextrin-Based Nanofibers and Membranes: Fabrication, Properties and Applications

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