Polydiacetylene Supramolecules in Electrospun Microfibers: Fabrication, Micropatterning, and Sensor Applications

Chae, Sang Kyun; Park, Hyunwook; Yoon, Jonghun; Lee, Cheol Hee; Ahn, Dong June; Kim, Jong Man

doi:10.1002/adma.200602012

Cited by 131 publications

(102 citation statements)

References 34 publications

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“…The additional band at 602 cm 21 was also observed; it arises due to excitation of the t 4 mode of PO 4 32 groups along with the characteristic SiÀ ÀO mode. These bands and their positions in the FTIR spectrum indicated the formation of Si-HA composite matrix.…”

Section: Chemistrymentioning

confidence: 93%

Biomimetic hydroxyapatite particulate nanofiber modified silicon: In vitro bioactivity

Aryal

Bajgai

Khil

et al. 2008

J Biomedical Materials Res

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A novel particulate nanofibrous hydroxyapatite (HA), which mimics the bone matrix, is presented as a surface functional material to modify silicon wafers by the electrospinning method. The HA precursors were treated with viscous polymer solution, and then electrospun under controlled conditions. After successive calcinations, the powder X-ray diffraction patterns of the samples revealed reflection toward the (300) HA plane that is linear with temperature. This prominent reflection suggests the crystallographic purity of the HA. Biocompatibility, cell proliferation, and microstructure were examined using AFM and FE-SEM. Morphology showed cell spreading and penetration instead of cell aggregation. The surface roughness as well as adhesion force was calculated using contact mode AFM. The results show that the composite matrix holds promise for use as a bone implant material.

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Section: Chemistrymentioning

confidence: 93%

Biomimetic hydroxyapatite particulate nanofiber modified silicon: In vitro bioactivity

Aryal

Bajgai

Khil

et al. 2008

J Biomedical Materials Res

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“…[2][3][4][5][6][7][8][9][10][11][12][13][14] In the latter case, the applications rely on their ability to change colors in response to temperature, 15 pH, 16 receptors, [17][18][19][20][21] and other molecules 22 in a system. In addition, the flexibility of the precursors of polydiacetylenes to construct a variety of micro-or nanostructures (depending on the preparation methods) makes it possible to use them for the desired purposes.…”

Section: Introductionmentioning

confidence: 99%

Role of Gel to Fluid Transition Temperatures of Polydiacetylene Vesicles with 10,12-Pentacosadiynoic Acid and Cholesterol in Their Thermochromisms

Kwon

Song

Yoon

et al. 2014

Bulletin of the Korean Chemical Society

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This study demonstrates gel-to-fluid transition temperatures of polydiacetylene bilayer vesicles could play important roles in their colorimetric transition temperatures. We prepared five types of polydiaceylene vesicles with 10,12-pentacosadiynoic acid (PCDA) and cholesterol (0-40 mol % of total content). From temperaturedependent observations of the optical signals (colors and UV-vis spectra), the blue-to-red colorimetric transition temperatures of polydiacetylene vesicles were decreased with the cholesterol contents. A further study with microcalorimetry and dynamic light scattering revealed that the polydiacetylene vesicles first underwent gel-to-fluid transitions, which were followed by event(s) responsible for the colorimetric transitions. Energies required for each event were quantified from analysis of the peaks in the microcalorimetry thermograms. The inclusion of cholesterol in the vesicles decreased both the gel-to-fluid and the colorimetric transition temperatures, suggesting that the colorimetric transition of the polydiacetylene vesicles was mediated by the former event although the event was not the direct reason for the color change.

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“…Consequently, electrospinning is not only a robust technique to produce polymeric nanofibers but also a method to fabricate well-ordered nanostructured materials for various applications. [17][18][19][20][21][22][23] In our previous work, 19 we reported controlled spontaneous emission of CdSe nanoparticles dispersed in an electrospun mat based on the segmented poly(carbonate urethane) copolymer. Elongational flow of the electrospinning process orients the copolymer domains associated with the particles.…”

Section: Introductionmentioning

confidence: 99%

“…Zusmann et al 17 reported polarized photoluminescence of CdS quantum wires oriented within electrospun PEO fibers. Chae et al 23 proposed electrospinning of a π-conjugating diaryl-substituted polyacetylene, which forms a porous honeycomb network structure resulting in optical anisotropy of a strong emission perpendicular to the fiber axis. In this work, we present the formation of J-aggregates of 1,1′-diethyl-2,2′-cyanine bromide (PIC) upon electrospinning.…”

Section: Introductionmentioning

confidence: 99%

Formation of Pseudoisocyanine J-Aggregates in Poly(vinyl alcohol) Fibers by Electrospinning

2009

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Submicrometer diameter, light emitting fibers of poly(vinyl alcohol) (PVA) doped with pseudoisocyanine (1,1′-diethyl-2,2′-cyanine bromide, PIC) dye were prepared by electrospinning. A horizontal setup was employed with a stationary collector consisting of two parallel-positioned metal strips separated by a void gap. Formation of uniaxially aligned and randomly deposited fibers in electrospun films was confirmed by microscopy. Photoluminescence (PL) spectroscopy is used to evaluate spectral properties of both types of fibers doped with PIC. While PIC molecules were individually dispersed in PVA solution, they assemble into J-aggregates upon electrospinning when the weight fraction of PIC molecules is above 2.5 wt %. The formation of J-aggregates was observed in both randomly deposited and uniaxially aligned electrospun fibers. Moreover, the fibers aligned uniaxially showed a high degree of polarized emission (PL | /PL ⊥ ) 10), arising from the orientation of J-aggregates along the fiber axis. On the other hand, isotropic emission of J-aggregates was observed from the fibers deposited randomly. As a conclusion, electrospinning was found to be an efficient and a practical method to form highly oriented J-aggregates dispersed into polymer fibers. To the best of our knowledge, it is the first time formation of J-aggregates (a bottom-up approach) and electrospinning (a topdown approach) is successfully combined.

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Polydiacetylene Supramolecules in Electrospun Microfibers: Fabrication, Micropatterning, and Sensor Applications

Cited by 131 publications

References 34 publications

Biomimetic hydroxyapatite particulate nanofiber modified silicon: In vitro bioactivity

Biomimetic hydroxyapatite particulate nanofiber modified silicon: In vitro bioactivity

Role of Gel to Fluid Transition Temperatures of Polydiacetylene Vesicles with 10,12-Pentacosadiynoic Acid and Cholesterol in Their Thermochromisms

Formation of Pseudoisocyanine J-Aggregates in Poly(vinyl alcohol) Fibers by Electrospinning

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