Enhanced affinochromism of polydiacetylene monolayer in response to bacteria by incorporating CdS nano-crystallites

Zhang, Yuanjian; Ma, Baoliang; Li, Yajun; Li, Jinghong

doi:10.1016/j.colsurfb.2004.02.006

Cited by 13 publications

(9 citation statements)

References 17 publications

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“…Li and co-workers reported preparation of poly(10,12-PCDA) monolayers with 5% 10,12-PCDA tethered to a-D-mannopyranoside via a 3-unit ethylene glycol linker (Scheme 4, 6). 154 The monolayers were deposited onto glass slides and immersed in CdCl 2 solutions. The treated slides were then exposed to H 2 S to form CdS nano-crystallites at the polymer surface.…”

Section: Detection Of Viruses and Microorganismsmentioning

confidence: 99%

Biosensing with polydiacetylene materials: structures, optical properties and applications

2007

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Polydiacetylene (PDA) materials are used as a platform for detection of biological analytes such as microorganisms, viruses and proteins. The environmentally responsive chromic and emissive properties of the polymer, combined with self-assembled material formats, make these materials particularly attractive for biosensing applications. A variety of approaches have been used in developing these materials and demonstrating their potential for biological detection. In this feature article we describe different PDA material formats, discuss the optical properties that are the basis for signal generation, and review the use of PDA for biosensing.

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Section: Detection Of Viruses and Microorganismsmentioning

confidence: 99%

Biosensing with polydiacetylene materials: structures, optical properties and applications

2007

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“…The PDA backbone is a linear conjugated polymer with alternating triple and double bonds in an ''yne-ene'' motif. The unique electronic and the associated fluorescence and chromatic properties, along with mechanical and chemical stability, make PDA LFs attractive materials for a variety of technological applications such as chemical and biological sensors [1][2][3][4][5][6][7] and effective templates for oriented growth of calcite 8,9 and semiconductor nanocrystals. [10][11][12][13] The spectroscopic properties of polydiacetylenes (PDA) have been widely studied and recently described by Schott 14 and Filhol et al 15 In general, the colorless monomer undergoes topotactic polymerization upon UV irradiation and transforms into the metastable blue phase.…”

Section: Introductionmentioning

confidence: 99%

Zinc modified polydiacetylene Langmuir films

et al. 2011

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Polydiacetylene (PDA) Langmuir films (LF) containing Zn 2+ cations were prepared in different experimental procedures. The incorporation of zinc cations resulted in new morphological and spectral properties. We found that zinc cations stabilize the blue phase of PDA, and inhibit its transformation into the red phase, withstanding prolonged exposure to UV irradiation. The increased stability was accompanied with the loss of the linear strand morphology and appearance of a new, transient purple phase before the final red phase stage. It was found that the most significant differences in film properties occur when the zinc cations are already present in solution during the polymerization stage at sufficient concentration. In such case zinc ions penetrate into the headgroup interlayer in the trilayer organization, and are implicated in the film's chromatic properties. In cases where polymerization was carried out prior to introduction of the cations, the properties of PDA/Zn 2+ films are similar to films produced on a pure water subphase.

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“…In biosensing, bound ligands are expected to exert forces on PDAs, as in the case of an AFM cantilever, yet how each molecule does that is unclear in many cases. Ligands are often surface-bound, 82 deep-bound (where the receptor is embedded within PDAs), 83 inserted, 84 or aggregated 85 to initiate the color transition (Fig. 7; also see the categorization shown in Table S1†).…”

Section: Conclusion and Future Perspectivementioning

confidence: 99%