Cited by 216Photonic Crystals and ApplicationsPolydiacetylene-based materials and applicationsAdvanced Fiber Optic Sensors

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Two-Dimensional Photonic Crystal Chemical and Biomolecular Sensors

Cai, Zhongyu, Smith, Natasha L., Zhang, Jian-Tao, Asher, Sanford A.·2015·Analytical Chemistry

DOI 10.1021/ac504679n

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Abstract

We review recent progress in the development of two-dimensional (2-D) photonic crystal (PC) materials for chemical and biological sensing applications. Self-assembly methods were developed in our laboratory to fabricate 2-D particle array monolayers on mercury and water surfaces. These hexagonal arrays strongly forward Bragg diffract light to report on their array spacings. By embedding these 2-D arrays onto responsive hydrogel surfaces, 2-D PC sensing materials can be fabricated. The 2-D PC sensors utilize responsive polymer hydrogels that are chemically functionalized to show volume phase transitions in selective response to particular chemical species. Novel hydrogels were also developed in our laboratory by cross-linking proteins while preserving their native structures to maintain their selective binding affinities. The volume phase transitions swell or shrink the hydrogels, which alter their 2-D array spacings, and shift their diffraction wavelengths. These shifts can be visually detected or spectrally measured. These 2-D PC sensing materials have been used for the detection of many analytes, such as pH, surfactants, metal ions, proteins, anionic drugs, and ammonia. We are exploring the use of organogels that use low vapor pressure ionic liquids as their mobile phases for sensing atmospheric analytes.

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Authors: Cai, Z., Smith, N. L., Zhang, J.-T., & Asher, S. A.
Affiliations: University of Pittsburgh (US)
Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
Corresponding author: Asher, Sanford A.
ORCID: Cai, Zhongyu
Smith, Natasha L.
Asher, Sanford A.
Venue: Analytical Chemistry
Publisher: American Chemical Society (ACS)
Published: 2015-04-27
Volume: 87
Issue: 10
Pages: 5013-5025
ISSN: 0003-2700 (ISSN-L)
1520-6882
DOI: 10.1021/ac504679n
OpenAlex: W2322761863
Cited by: 216
References: 81
Citations by year: 2026: 6 · 2025: 11 · 2024: 15 · 2023: 24 · 2022: 27 · 2021: 13 · 2020: 15 · 2019: 40 · 2018: 18 · 2017: 24 · 2016: 16 · 2015: 7
FWCI: 1.29
Type: journal article
Language: en
Open access: closed
Locations: Analytical Chemistry (publishedVersion)
PubMed (publishedVersion)
Funders: Defense Threat Reduction Agency (1-10-1-0044)
Topics: Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Photonic Crystals and Applications
Physical Sciences › Chemistry › Organic Chemistry › Polydiacetylene-based materials and applications
Physical Sciences › Engineering › Electrical and Electronic Engineering › Advanced Fiber Optic Sensors
Keywords: two-dimensional photonic crystals, chemical sensors, biosensors, Bragg diffraction, self-assembled monolayers, Mercury surface, water surface, responsive hydrogels, volume phase transition, protein cross-linking, protein hydrogels, pH detection, metal ion sensing, surfactant detection, protein detection, ammonia detection, organogels, ionic liquids
MeSH terms: Chemistry Techniques, Analytical, Humans, Biosensing Techniques, Photons, Nanostructures

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