Variable ultrafast optical nonlinearity in bacteriorhodopsin achieved through simple chemical treatment

Jeganathan, C.; Girisun, T.C. Sabari; Rao, S. Venugopal; Kaliannan, Thamaraiselvi

doi:10.1007/s10853-017-0924-x

Cited by 5 publications

(2 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…bR also shows a large hyperpolarizability, important in frequency-doubling experiments, investigated by NLO techniques (Naskali et al, 2014). The nonlinear refractive index value n 2 of bR-containing samples has been extensively investigated previously under various experimental conditions, in most of the cases using the so-called Z-scan technique (Song et al, 1993;Aranda et al, 1995;Jeganathan et al, 2017). The spectro-kinetic properties and light-induced refractive index changes have also been discussed (van der Horst et al, 2005;Krekic et al, 2019), which further encourages investigation of the protein's NLO properties.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Optical Investigation of Microbial Chromoproteins

et al. 2020

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Nonlinear Optical Investigation of Microbial Chromoproteins

et al. 2020

View full text Add to dashboard Cite

“…bR is an integral membrane protein in the 2D crystalline patches (termed as purple membrane, PM), which endows it with excellent stability against chemical, light, and thermal degradations . These properties make bR a promising biomaterial for bioelectronic, optoelectronic, and nonlinear optical applications . For bR‐based photoelectric devices, both blue and green lights are indispensable to produce stationary photocurrent .…”

Section: Methodsmentioning

confidence: 99%

Bacteriorhodopsin‐Based Biophotovoltaic Devices Driven by Chemiluminescence as Endogenous Light Source

Zhou

Liu

et al. 2019

Advanced Optical Materials

View full text Add to dashboard Cite

As a light‐driven proton pump, bacteriorhodopsin (bR) captures light and transports protons directionally. Here, a new bR‐based bioelectronic device that employs the chemiluminescence from luminol as an endogenous light source to generate steady current is designed. Purple membrane embedded with bR is modified on indium tin oxide (ITO) electrode followed by electrostatically binding of cationic oligo (p‐phenylene vinylene) derivative (OPV). The device is fabricated by coupling bR/OPV electrode and bare ITO electrode. As a suitable luminescence acceptor of luminol, OPV emits green light through chemiluminescence resonance energy transfer (CRET), which is capable of exciting ground state bR (bR570) nearby to initiate photocycle. Simultaneously, luminol emits blue chemiluminescent light which can be absorbed by M410 intermediate in photocycle, accelerating its reconversion to bR570 by shortcuts. As a result, the photocycle is accelerated and stabilized to generate a stable photocurrent. Furthermore, this study achieves to use oxygen and glucose as the initial source of hydrogen peroxide and produce stable photocurrent by taking advantage of the cascade reaction of glucose oxidase and horseradish peroxide. This provides a proof‐of‐concept for successfully using the CRET system as endogenous light source and provides new ideas for energy utilization and conversion taking advantage of natural bR‐based photosynthetic systems.

show abstract

Structurally modified bacteriorhodopsin as an efficient bio-sensitizer for solar cell applications

et al. 2018

View full text Add to dashboard Cite

Structurally modified bacteriorhodopsin (BR) was prepared by simple surfactant treatment using Cetyl trimethylammonium bromide (cationic; CTAB), Sodium dodecyl sulphate (anionic; SDS) and Triton X-100 (nonionic; TX-100). In the UV-visible absorption spectrum, the characteristic absorption band of native BR at 560 nm is hyperchromically (CTAB, due to induced aggregation), bathochromically (SDS, BR solubilisation and partial unfolding) and hypsochromically (TX-100, BR monomerizes) shifted after chemical treatment and the structural modifications were further confirmed by Raman spectra. Theoretical calculations based on optical absorption support an enhancement of BR optical and electrical conductivity via structural modification. Bio-sensitized solar cells (BSSCs) with structurally altered BR as sensitizer were fabricated and their photovoltaic performance was measured. We obtained the maximum short-circuit photocurrent and photoelectric conversion efficiency with TX-100-treated BR (0.93 mA cm, 0.47%), with a quasi-Fermi level and a 124-ms lifetime of photogenerated electrons in TX-100-treated BR-sensitized BSSCs, two times higher than that observed in BSSCs with native BR. A single-diode equivalent circuit model reveals favorable BSSC parameters such as high reverse saturation current (I = 55 nA), low series resistance (R = 22.9 Ω) and high shunt resistance (R = 3765.5 Ω) with TX-100-treated BR-based BSSCs. As TX-100 does not alter the BR carboxyl terminus during its monomerization, maximum anchoring to the BSSC occurs which results in enhanced photocurrent generation. Thus, monomerized BR-sensitized BSSCs with their excellent photovoltaic parameters suggest the possibility of replacing native BR with TX-100 BR and this opens up the possibility of reduced cost manufacture of bio-sensitized solar cells.

show abstract

Variable ultrafast optical nonlinearity in bacteriorhodopsin achieved through simple chemical treatment

Cited by 5 publications

References 44 publications

Nonlinear Optical Investigation of Microbial Chromoproteins

Nonlinear Optical Investigation of Microbial Chromoproteins

Bacteriorhodopsin‐Based Biophotovoltaic Devices Driven by Chemiluminescence as Endogenous Light Source

Structurally modified bacteriorhodopsin as an efficient bio-sensitizer for solar cell applications

Contact Info

Product

Resources

About