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Band gap control using electric field of photonic gel cells fabricated with block copolymer and hydrogel.

Journal of nanoscience and nanotechnology · 2014 · Unclear · Insufficient evidence

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UnclearInsufficient evidencePaper 3026

In a photonic gel/hydrogel electrolyte device on ITO glass, applying 2 V between facing electrodes shifted the reflectance maximum wavelength from 538 nm to 557 nm, 585 nm, and 604 nm over 30 minutes. Bandwidth variation was reported as very limited, and elec…

Study snapshot

PublicationJournal of nanoscience and nanotechnology · 2014
Study typeengineering
Reported directionUnclear
Evidence ratingInsufficient

Abstract

Optical and electrical characteristics of the devices using photonic gel film and hydrogel electrolyte were studied. Poly(styrene-b-2-vinylpyridine) (PS-b-P2VP) lamellar film with alternating hydrophobic block and hydrophilic polyelectrolyte block polymers (52 kg/mol-b-57 kg/mol) were prepared for the photonic gel. Poly(isobutylene-co-maleic acid) sodium salts were prepared for the hydrogel. This hydrogel fiber is common water swelling material and it owned ions for a device has conductivity. Photonic gel and hydrogel was spin coating onto Indium-tin-oxide (ITO) glass for make electric fields. The reflectance maximum wavelength of photonic crystal device shifted from 538 nm and reached to 557 nm, 585 nm and 604 nm during 30 min voltage applying time. The bandwidth variation was very limited. Loss of electrolyte was much less with hydrogel compared to the pure water. We can control color of hydrogel used photonic device by electric field with reasonable time range under moderate electric field by applying 2 V between two facing electrodes.

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AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeengineering
Effect directionunclear
PopulationNot supplied
Sample sizeNot supplied
Exposure30 min voltage applying time
Evidence strengthInsufficientConfidence: 74% · Peer reviewed: yes

Main findings

In a photonic gel/hydrogel electrolyte device on ITO glass, applying 2 V between facing electrodes shifted the reflectance maximum wavelength from 538 nm to 557 nm, 585 nm, and 604 nm over 30 minutes. Bandwidth variation was reported as very limited, and electrolyte loss was less with hydrogel than with pure water.

Outcomes measured

  • Optical reflectance maximum wavelength shift (color/band gap control)
  • Bandwidth variation
  • Electrolyte loss (hydrogel vs pure water)

Limitations

  • No sample size or number of devices reported in abstract
  • Electric field strength (e.g., V/m) and electrode spacing not provided
  • No statistical analysis or variability measures reported in abstract
View raw extracted JSON
{
  "study_type": "engineering",
  "exposure": {
    "band": null,
    "source": "applied electric field between electrodes (photonic gel cell device)",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": "30 min voltage applying time"
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "Optical reflectance maximum wavelength shift (color/band gap control)",
    "Bandwidth variation",
    "Electrolyte loss (hydrogel vs pure water)"
  ],
  "main_findings": "In a photonic gel/hydrogel electrolyte device on ITO glass, applying 2 V between facing electrodes shifted the reflectance maximum wavelength from 538 nm to 557 nm, 585 nm, and 604 nm over 30 minutes. Bandwidth variation was reported as very limited, and electrolyte loss was less with hydrogel than with pure water.",
  "effect_direction": "unclear",
  "limitations": [
    "No sample size or number of devices reported in abstract",
    "Electric field strength (e.g., V/m) and electrode spacing not provided",
    "No statistical analysis or variability measures reported in abstract"
  ],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "photonic gel",
    "hydrogel electrolyte",
    "block copolymer",
    "electric field",
    "ITO glass",
    "reflectance shift",
    "color control"
  ],
  "suggested_hubs": []
}
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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.1166/jnn.2014.8810
PubMed: 25936055

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