Stomata-Inspired Photomechanical Ion Nanochannels Modified by Azobenzene Composites

Kyoung Yong Chun, Young Jun Son, Sunghwan Jo, Chang-Soo Han

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A low-powered and highly selective photomechanical sensor system mimicking stomata in the epidermis of leaves harvested from nature is demonstrated. This device uses a light-responsive composite consisting of 4-amino-1,1'-azobenzene-3,4'-disulfonic acid monosodium salt (AZO) and poly(diallyldimethylammonium chloride) (PDDA) coated on a membrane with tens of nanometer-size pores. The ionic current change through the pore channels as a function of pore size variation is then measured. The tran-cis isomerism of AZO-PDDA during light irradiation and the operation mechanism of photomechanical ion channel sensor are discussed and analyzed using UV-vis spectroscopy and atomic force microscopy analysis. It presents the discriminative current levels to the different light wavelengths. The response time of the photoreceptor is about 0.2 s and it consumes very low operating power (≈15 nW) at 0.1 V bias. In addition, it is found that the change of the pore diameter during the light irradiation is due to the photomechanical effect, which is capable of distinguishing light intensity and wavelength.

Original languageEnglish
JournalSmall
DOIs
Publication statusAccepted/In press - 2018 Jan 1

Fingerprint

Azobenzene
Ions
Light
Composite materials
Pore size
Irradiation
Isomerism
Wavelength
Atomic Force Microscopy
Sensors
Ultraviolet spectroscopy
Ion Channels
Epidermis
Reaction Time
Atomic force microscopy
Spectrum Analysis
Salts
azobenzene
Membranes
Equipment and Supplies

Keywords

  • Azobenzene
  • Ion channels
  • Photomechanical sensors
  • Pore actuation
  • Stomata

ASJC Scopus subject areas

  • Biotechnology
  • Biomaterials
  • Engineering (miscellaneous)

Cite this

Stomata-Inspired Photomechanical Ion Nanochannels Modified by Azobenzene Composites. / Chun, Kyoung Yong; Son, Young Jun; Jo, Sunghwan; Han, Chang-Soo.

In: Small, 01.01.2018.

Research output: Contribution to journalArticle

@article{73fe7ad53b3544a18526d8bacba5d6a7,
title = "Stomata-Inspired Photomechanical Ion Nanochannels Modified by Azobenzene Composites",
abstract = "A low-powered and highly selective photomechanical sensor system mimicking stomata in the epidermis of leaves harvested from nature is demonstrated. This device uses a light-responsive composite consisting of 4-amino-1,1'-azobenzene-3,4'-disulfonic acid monosodium salt (AZO) and poly(diallyldimethylammonium chloride) (PDDA) coated on a membrane with tens of nanometer-size pores. The ionic current change through the pore channels as a function of pore size variation is then measured. The tran-cis isomerism of AZO-PDDA during light irradiation and the operation mechanism of photomechanical ion channel sensor are discussed and analyzed using UV-vis spectroscopy and atomic force microscopy analysis. It presents the discriminative current levels to the different light wavelengths. The response time of the photoreceptor is about 0.2 s and it consumes very low operating power (≈15 nW) at 0.1 V bias. In addition, it is found that the change of the pore diameter during the light irradiation is due to the photomechanical effect, which is capable of distinguishing light intensity and wavelength.",
keywords = "Azobenzene, Ion channels, Photomechanical sensors, Pore actuation, Stomata",
author = "Chun, {Kyoung Yong} and Son, {Young Jun} and Sunghwan Jo and Chang-Soo Han",
year = "2018",
month = "1",
day = "1",
doi = "10.1002/smll.201703618",
language = "English",
journal = "Small",
issn = "1613-6810",
publisher = "Wiley-VCH Verlag",

}

TY - JOUR

T1 - Stomata-Inspired Photomechanical Ion Nanochannels Modified by Azobenzene Composites

AU - Chun, Kyoung Yong

AU - Son, Young Jun

AU - Jo, Sunghwan

AU - Han, Chang-Soo

PY - 2018/1/1

Y1 - 2018/1/1

N2 - A low-powered and highly selective photomechanical sensor system mimicking stomata in the epidermis of leaves harvested from nature is demonstrated. This device uses a light-responsive composite consisting of 4-amino-1,1'-azobenzene-3,4'-disulfonic acid monosodium salt (AZO) and poly(diallyldimethylammonium chloride) (PDDA) coated on a membrane with tens of nanometer-size pores. The ionic current change through the pore channels as a function of pore size variation is then measured. The tran-cis isomerism of AZO-PDDA during light irradiation and the operation mechanism of photomechanical ion channel sensor are discussed and analyzed using UV-vis spectroscopy and atomic force microscopy analysis. It presents the discriminative current levels to the different light wavelengths. The response time of the photoreceptor is about 0.2 s and it consumes very low operating power (≈15 nW) at 0.1 V bias. In addition, it is found that the change of the pore diameter during the light irradiation is due to the photomechanical effect, which is capable of distinguishing light intensity and wavelength.

AB - A low-powered and highly selective photomechanical sensor system mimicking stomata in the epidermis of leaves harvested from nature is demonstrated. This device uses a light-responsive composite consisting of 4-amino-1,1'-azobenzene-3,4'-disulfonic acid monosodium salt (AZO) and poly(diallyldimethylammonium chloride) (PDDA) coated on a membrane with tens of nanometer-size pores. The ionic current change through the pore channels as a function of pore size variation is then measured. The tran-cis isomerism of AZO-PDDA during light irradiation and the operation mechanism of photomechanical ion channel sensor are discussed and analyzed using UV-vis spectroscopy and atomic force microscopy analysis. It presents the discriminative current levels to the different light wavelengths. The response time of the photoreceptor is about 0.2 s and it consumes very low operating power (≈15 nW) at 0.1 V bias. In addition, it is found that the change of the pore diameter during the light irradiation is due to the photomechanical effect, which is capable of distinguishing light intensity and wavelength.

KW - Azobenzene

KW - Ion channels

KW - Photomechanical sensors

KW - Pore actuation

KW - Stomata

UR - http://www.scopus.com/inward/record.url?scp=85044711195&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85044711195&partnerID=8YFLogxK

U2 - 10.1002/smll.201703618

DO - 10.1002/smll.201703618

M3 - Article

AN - SCOPUS:85044711195

JO - Small

JF - Small

SN - 1613-6810

ER -