Plasma Polymerization of Rhodamine 6G Thin Films

Barranco, Ángel; Bielmann, M.; Widmer, Roland; Groening, P.

doi:10.1002/adem.200500051

Cited by 7 publications

(16 citation statements)

References 37 publications

(8 reference statements)

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“…[16] On the other hand, the polymerized films of Ethyl Red presented, among other properties, an increase in the red color intensity when exposed to vapors of a hydrogen chloride solution. This is the typical behavior of this dye commonly used as a pH sensor.…”

Section: Optical Properties Of the Thin Filmsmentioning

confidence: 98%

“…As a result of this process, a polymeric thin film is produced where some dye molecules keep intact their optical activity (although eventually, their optical response can be slightly modified by matrix effects). [15][16][17] By comparison with conventional thin films containing dyes prepared by sol/gel and similar procedures, this new type of dye thin films are much thinner (for example, some tenths of nanometers are enough to get similar extinction coefficients as films of several micrometer thickness prepared by wet routes), are very flat, and permit a very easy control of the matrix effects that influence the optical response of the dye molecules. To our knowledge, this is the first time that such a type of polymerization process rendering optically active films has been successfully achieved.…”

Section: Introductionmentioning

confidence: 96%

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Optically Active Thin Films Deposited by Plasma Polymerization of Dye Molecules

Barranco

Aparicio

Yanguas‐Gil

et al. 2007

Chemical Vapor Deposition

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Colored and fluorescent thin films are prepared via polymerization of dye molecules by interaction with a remote plasma of Ar while they are sublimated on a substrate. The films are formed by a crosslinked matrix of fragments of the original dye and some unreacted molecules. Films made of Ethyl Red or Rhodamine 6G dyes are characterized and studied with regard to their optical properties. Plasma characterization by optical emission spectroscopy (OES) shows the fragmentation of the evaporated dye molecules by interaction of the dye molecules with the electrons of the plasma. The electron energy seems to be the main parameter controlling the polymerization degree of the films. The process is very interesting for the deposition of thin films containing functional molecules.

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Section: Optical Properties Of the Thin Filmsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 96%

Optically Active Thin Films Deposited by Plasma Polymerization of Dye Molecules

Barranco

Aparicio

Yanguas‐Gil

et al. 2007

Chemical Vapor Deposition

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“…Such characteristics are similar to those observed in other PAVD films. 8,10,11,13 In these previous studies, it was established that they consist in a cross-linked matrix formed by the binding of the different molecular moieties produced by the plasma fragmentation of the sublimated precursor. In order to confirm these structural characteristics the 3-HF PAVD films have been characterized by XPS, ToF-SIMS and FT-IR spectroscopies.…”

Section: Composition Structure and Microstructure Of The Pavd Thin Fmentioning

confidence: 99%

“…Note that the surface oxygen enrichment observed in these films is a general phenomenon in plasma polymer that has been also reported for PAVD thin films. [9][10][11][12][13] This oxygen incorporation is usually attributed to the reaction of surface radicals with air when the films are exposed to the atmosphere after their preparation. 46 To get information about the chemical structure of the 3-HF PAVD films and confirm the incorporation of entire dye molecules, the ToF-SIMS spectra of selected 3-HF films are presented in Fig.…”

Section: Composition Structure and Microstructure Of The Pavd Thin Fmentioning

confidence: 99%

Luminescent 3-hydroxyflavone nanocomposites with a tuneable refractive index for photonics and UV detection by plasma assisted vacuum deposition

et al. 2014

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Luminescent organic-thin-films transparent in the visible region have been synthetized by a plasma assisted vacuum deposition method. The films have been developed for their implementation in photonic devices and for UV detection. They consist in a plasma polymeric matrix that incorporates 3-hydroxyflavone molecules characterized by absorbing UV radiation and emitting green light. The present work studies in detail the properties and synthesis of this kind of transparent and luminescent materials. The samples have been characterized by X-ray photoemission (XPS), infrared (FT-IR) and secondary ion mass (ToF-SIMS) spectroscopies; and their optical properties analysed by UV-Vis absorption, fluorescence and ellipsometry (VASE) spectroscopies. The key factors controlling the optical and luminescent properties of the films are also discussed. Indeed, our experimental results show how the optical properties of the films can be adjusted for their integration in photonic devices. Moreover, time resolved and steady state fluorescence analyses, including quantum yield determination, indicate that the fluorescence efficiency is a function of the deposition parameters. An outstanding property of these materials is that, even for high UV absorption values (i.e. large layer thickness and/or dye concentration), the emitted light is not reabsorbed by the film. Such a highly UV absorbent and green emitting films can be used as UV photodetectors with a detection threshold smaller than 10 μW cm -2 , a value similar to the limit of some commercial UV photodetectors. Based on these properties, it is also proposed the use of the films as visual tags for the detection of solar UV irradiation.

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“…The technology is based on plasma enhanced chemical vapor deposition (PECVD) [12] . This synthesis allows precise control of various parameters such as thin film thickness and planarity, morphological and mechanical characteristics (e.g.…”

Section: Fabricationmentioning

confidence: 99%

Visual gas sensors based on dye thin films and resonant waveguide gratings

et al. 2011

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A colorimetric sensor that provides a direct visual indication of chemical contamination was developed. The detection is based on the color change of the reflected light after exposure to a gas or a liquid. The sensor is a combination of a chemically sensitive dye layer and a subwavelength grating structure. To enhance the perception of color change, a reference area sealed under a non-contaminated atmosphere is used and placed next to the sensor. The color change is clearly visible by human eyes. The device is based on photonic resonant effects; the visible color is a direct reflection of some incoming light, therefore no additional supplies are needed. This makes it usable as a standalone disposable sensor. The dye thin film is deposited by Plasma enhanced chemical vapor deposition (PECVD) on top of the subwavelength structure. The latter is made by combining a replication process of a Sol-Gel material and a thin film deposition. Lowcost fabrication and compatibility with environments where electricity cannot be used make this device very attractive for applications in hospitals, industries, with explosives and in traffic.

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Plasma Polymerization of Rhodamine 6G Thin Films

Cited by 7 publications

References 37 publications

Optically Active Thin Films Deposited by Plasma Polymerization of Dye Molecules

Optically Active Thin Films Deposited by Plasma Polymerization of Dye Molecules

Luminescent 3-hydroxyflavone nanocomposites with a tuneable refractive index for photonics and UV detection by plasma assisted vacuum deposition

Visual gas sensors based on dye thin films and resonant waveguide gratings

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