FRET from CdSe/ZnS Core-Shell Quantum Dots to Fluorescein 27 Dye

Shivkumar, M. A.; Inamdar, Laxmi S.; Rabinal, M. K.; Mulimani, B. G.; Rao, Gopal M. Advi; Inamdar, Sanjeev R.

doi:10.4236/ojpc.2013.31006

Cited by 18 publications

(9 citation statements)

References 48 publications

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“…Therefore, tremendous interest has been shown in photo‐luminescent semiconductor nanoparticles, known as quantum dots (QDs), as they have attractive photophysical properties like narrow emission peak and large Stokes shifts. In addition, these (QDs) have size‐dependent emission bands that are without a significant red tail . Indeed, this size‐dependent emission is a consequence of a quantum confinement effect which occurs when the size of the exciton (given by the Bohr exciton radius, r Bohr ) exceeds the physical size (D) of the semiconductor nanocrystal.…”

Section: Introductionmentioning

confidence: 99%

Surface and spectroscopic properties of CdSe/ZnS/PVC nanocomposites

Ahmed

2015

Polymer Composites

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It is valuable to understand the way the wettability is affected by the solid and the liquid surface free energies. For this study, transparent films of CdSe/ZnS/PVC nanocomposites have been prepared and characterized by FTIR and contact angle measurements. Moreover, the presence of polar interactions at the liquid/polymer interfaces, which show a proportionality to the polar components of the liquid surface energy for pure polyvinyl chloride (PVC) and all CdSe/ZnS/PVC nanocomposites, is also studied. By using the surface polarizability hypothesis, there is possibility to obtain the dispersion component of surface‐free energies of pure PVC and also its nanocomposites from the contact angles measurement of only polar liquids. This approximately is coincident with that published data for pure PVC obtained from both polar and nonpolar liquids' contact angles. In addition to this, the absorption spectra and the photoluminescence illustrate clearly the effect of CdSe/ZnS quantum dots on their host matrix. The calculated values of the optical parameters, such as energy gap and Urbach energy, illustrate an inverse proportionality between them. POLYM. COMPOS., 38:749–758, 2017. © 2015 Society of Plastics Engineers

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Section: Introductionmentioning

confidence: 99%

Surface and spectroscopic properties of CdSe/ZnS/PVC nanocomposites

Ahmed

2015

Polymer Composites

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“…An example is shown in Figure 3 where multi-color emission capability is realized by including an array of resonators with different color emissions tuned to different sound pressure levels (SPLs). The set of D-A pairs in [4] is extended in Table 1 to include multiple colors, and a diversity of D-A pair selections with different diameters and types, i.e., dyes, QDs and proteins [13,14]. Excitation wavelengths of donors and acceptors, Two-dimensional Materials for Photodetector Figure 2.…”

Section: Nanoscale Acousto-optic Sensor Designmentioning

confidence: 99%

“…FRET utilized in a rich set of biological, physical and chemical applications such as monitoring cellular activities has also been utilized for nanoscale communication channels [10][11][12]. Semiconductor nanocrystal QDs form a unique cooperation with graphene resonators by utilizing high performance properties such as sharp and broad absorption spectrum, large absorption cross-sections, tunable emission spectra and wavelength, photochemical stability and photoluminescence quantum yield [13,14]. In [4], a modulator is designed to be utilized in challenging applications for communications, sensing and energy harvesting with a scalable range including both nanoscale and macroscale dimensions.…”

Section: Introductionmentioning

confidence: 99%

Graphene-Based Acousto-Optic Sensors with Vibrating Resonance Energy Transfer and Applications

Gülbahar¹,

Memişoğlu²

2018

Two-Dimensional Materials for Photodetector

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Graphene as a two-dimensional planar material has numerous advantages for realizing highperformance nano-electromechanical systems (NEMS) such as nanoscale sensors including strain sensors, optical modulators or energy harvesters. Large Young's modulus (1 TPa for single layer graphene), ultra-low weight, low residual stress and large breaking strength properties are important properties as two-dimensional (2D) ultrathin resonators. Graphene resonators are recently utilized for low complexity design of nanoscale acousto-optic sensors based on a novel theoretical model describing vibrating Förster resonance energy transfer (VFRET) mechanism. Proposed system combines the advantages of graphene with quantum dots (QDs) as donor and acceptor pairs with broad absorption spectrum, large cross-sections, tunable emission spectra, size-dependent emission wavelength, high photochemical stability and improved quantum yield. Device structure supporting wide-band resonance frequencies including acoustic and ultrasound ranges promises high-performance applications for challenging environments. Remote sensors and acousto-optic communication channels are formed for in-body applications, wireless body area sensor networks (WBASNs), space and interplanetary systems, microfluidics and visible light communication (VLC)-based architectures.

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“…The effective absorption of the sensitizer in the visible region is the key factor to any light harvesting assembly. Semiconductor quantum dots like CdSe absorb in the visible region have been used as sensitizers and energy donors in hybrid solar cells leading to considerable improvement in efficiencies [7][8][9]. The scope of CdSe QDs by utilizing their intrinsic properties can be further enhanced by combining them with appropriate systems.…”

Section: Introductionmentioning

confidence: 99%

Exploring dynamics of resonance energy transfer in hybrid Quantum Dot Sensitized Solar Cells (QDSSC)

Ramanarayanan

Ummer

Sindhu

2020

Mater. Res. Express

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Graphene based nanomaterials are known to provide new avenues to improve semiconductor based light harvesting devices. This work makes use of graphene quantum dots (GQD) to improve the efficiency of a CdSe Quantum Dot Sensitized Solar Cell (QDSSC) by Förster Resonance Energy Transfer (FRET) mechanism. FRET describes non-radiative energy transfer between two adjacent molecules typically in range from 1 to 10 nm with one molecule as donor and other molecule as acceptor. If the acceptor is in close proximity of the excited donor, then their dipoles align resulting in transfer of excitation energy from donor to acceptor. Here graphene quantum dot acts as the energy donor to enhance light harvesting of CdSe quantum dot which acts as an acceptor in the hybrid solar cell. The introduction of GQD increases the efficiency of CdSe sensitized QDSSC from 0.18 to 0.28% showing an efficiency enhancement of 55%. The improved efficiency is mainly attributed to the 46% increase in current density of the GQD-CdSe solar cell compared to the CdSe QDSSC. The increased performance of the QDSSC owes to the existence of non-radiative energy transfer (FRET) between GQD and CdSe evident from photoluminescence (PL) quenching and lifetime measurements. This FRET system of GQD (donor)-CdSe (acceptor) shows an energy transfer of 48.7% providing new insights for selective light harvesting of the solar spectrum which can be utilised for various potential applications in future.

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FRET from CdSe/ZnS Core-Shell Quantum Dots to Fluorescein 27 Dye

Cited by 18 publications

References 48 publications

Surface and spectroscopic properties of CdSe/ZnS/PVC nanocomposites

Surface and spectroscopic properties of CdSe/ZnS/PVC nanocomposites

Graphene-Based Acousto-Optic Sensors with Vibrating Resonance Energy Transfer and Applications

Exploring dynamics of resonance energy transfer in hybrid Quantum Dot Sensitized Solar Cells (QDSSC)

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