1-D polymeric photonic crystals as spectroscopic zero-power humidity sensors

Georgaki, M.-I.; Botsialas, A.; Argitis, Panagiotis; Papanikolaou, N.; Οικονόμου, Π.; Raptis, Ioannis; Rysz, Jakub; Budkowski, Andrzej; Chatzichristidi, Margarita

doi:10.1016/j.mee.2013.11.003

Cited by 24 publications

(13 citation statements)

References 26 publications

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“…PCs are structures in which dielectric materials with different refractive indices are periodically arranged and thus selectively reflect light of a specific wavelength. Recently, PCs have been extensively investigated for use as real-time monitoring colorimetric sensors due to their color transition on exposure to external stimuli such as humidity, ,,− light, , temperature, − pH, − pressure, , vapor, − strain, − solvents, − and biomolecules , because of changes in the spatial modulation and contrasting refractive indexes of the materials. Different types of PC sensors were developed to monitor humidity changes associated with processes such as colloidal assembly, , block-copolymer self-assembly, the cyclic coating of polymers, and using inorganic and hybrid materials …”

Section: Introductionmentioning

confidence: 99%

Precisely Tunable Humidity Color Indicator Based on Photonic Polymer Films

et al. 2021

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Photonic crystals (PCs) are attractive for utilization as label-free self-display colorimetric sensors. In this study, one-dimensional (1D) photonic humidity color indicators with color transitions across the whole visible spectral range are reported. For this, we synthesized photo-cross-linkable poly(2-vinylnaphthalene-co-benzophenone acrylate) (P(2VN-co-BPA)) as a high-refractive-index polymer and poly(4-vinylpyridine-co-benzophenone acrylate) (P(4VP-co-BPA)) with its four quaternized derivatives (P4QP-14%, P4QP-25%, P4QP-37%, and P4QP-51%) as low-refractive-index polymers. The 1D PC films are fabricated via the sequential alternating layer deposition of high/low-refractive-index polymers onto a black poly(ethylene terephthalate) (PET) substrate. Distinct colorimetric humidity detection without an additional label is achieved by controlling the degree of quaternization of the P(4VP-co-BPA) layers and fine-thickness modulation of the P(2VN-co-BPA) and P4QP layers. The films exhibit remarkable color transitions with reliable sensitivity, reversibility, and reproducibility according to changes in the relative humidity (RH), covering the entire visible spectrum (435–756 nm) for 10–90% RH.

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Section: Introductionmentioning

confidence: 99%

Precisely Tunable Humidity Color Indicator Based on Photonic Polymer Films

et al. 2021

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“…A relatively simpler alternative is color sensing of humidity where detection is performed by visual inspection of color, or color monitoring, by cheap camera [15,16,17]. Multilayered structures, called Bragg stacks, exhibiting structural colors, have already been used for humidity detection, where different thin film materials are used as sensitive media: Porous TiO 2 deposited by glancing angle deposition method [18]; alternated tri-layers system of cellulose, poly(vinyl alcohol) and poly( N -vinylcarbazole) [19]; and, poly(2-hydroxylethyl methacrylate) and epoxy-based resist [20].…”

Section: Introductionmentioning

confidence: 99%

Influence of Macromolecular Architecture on the Optical and Humidity-Sensing Properties of Poly(N,N-Dimethylacrylamide)-Based Block Copolymers

et al. 2018

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Abstract:The influence of the macromolecular architecture of block copolymers containing poly(N,N-dimethyl acrylamide) (PDMA) on the optical characteristics and sensing properties of corresponding thin films is discussed. Series of hydrophilic PDMA-based copolymers of different chemical composition and chain architecture such as triblock, star-shaped, and branched were synthesized. The copolymers were characterized using conventional spectroscopic techniques as well as methods for characterization of copolymer macromolecular characteristics in solution, namely size-exclusion chromatography and static light scattering. Thin films of the copolymers of nanometer scale thickness were deposited on silicon substrates by the spin-coating method. The refractive index and extinction coefficient of the copolymer films were calculated from the reflectance spectra by using non-linear curve fitting methods and the composition-structure-optical properties relationships were evaluated. Humidity-sensing properties of the films were studied by measuring reflectance spectra of the films at a relative humidity range from 5 to 95%RH. The implementation of the copolymer films as optical sensors of humidity is justified and discussed.

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“…The growing demands of controlling water vapor led to considerable interests in the development of sensing materials. In recent years, materials that have been studied for this purpose mainly include organic polymers [1][2][3][4], metal oxide ceramics [5][6][7][8][9][10], and porous materials [11][12][13][14][15]. Among the porous materials mesoporous silica SBA-15 exhibits good properties such as environment stability, wide range of work temperature, and quick response-recovery properties [13,14].…”

Section: Introductionmentioning

confidence: 99%

AC Humidity Sensing Properties of Mesoporous K₂CO₃-SiO₂Composite Materials

Guo

Chu

Gao

et al. 2016

Journal of Chemistry

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The mesoporous silica SBA-15 and mesoporous K2CO3-SiO2composite material were synthesized. Characterization of microstructure and morphology of materials indicated that the composite material had saved the porous framework of mesoporous silica SBA-15. Humidity sensing properties of different inverse proportion K2CO3-SiO2composite material were studied and we found that the sample with 0.16 g/g K2CO3exhibited excellent linearity in the wide humidity range. The complex impedance changed five orders of magnitude from 11% RH to 95% RH. The rapid response and recovery time were 10 s and 38 s, respectively. Finally a feasible ion transfer mechanism was brought forward to explain the sensing mechanism.

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1-D polymeric photonic crystals as spectroscopic zero-power humidity sensors

Cited by 24 publications

References 26 publications

Precisely Tunable Humidity Color Indicator Based on Photonic Polymer Films

Precisely Tunable Humidity Color Indicator Based on Photonic Polymer Films

Influence of Macromolecular Architecture on the Optical and Humidity-Sensing Properties of Poly(N,N-Dimethylacrylamide)-Based Block Copolymers

AC Humidity Sensing Properties of Mesoporous K₂CO₃-SiO₂Composite Materials

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1-D polymeric photonic crystals as spectroscopic zero-power humidity sensors

Cited by 24 publications

References 26 publications

Precisely Tunable Humidity Color Indicator Based on Photonic Polymer Films

Precisely Tunable Humidity Color Indicator Based on Photonic Polymer Films

Influence of Macromolecular Architecture on the Optical and Humidity-Sensing Properties of Poly(N,N-Dimethylacrylamide)-Based Block Copolymers

AC Humidity Sensing Properties of Mesoporous K2CO3-SiO2Composite Materials

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AC Humidity Sensing Properties of Mesoporous K₂CO₃-SiO₂Composite Materials