Photonic band gap effect and dye-encapsulated cucurbituril-triggered enhanced fluorescence using monolithic colloidal photonic crystals

Vipin, V. V.; Chandran, Priya; Ramachandran, Animesh M.; Mohamed, Alaa; Pillai, Saju

doi:10.1039/c9nj03328a

Cited by 12 publications

(11 citation statements)

References 31 publications

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“…Plasmonic enhanced fluorescence (PEF) is produced through effective coupling of a metal nanostructure localized surface plasmon resonance (LSPR) with photoexcited fluorophores to increase their photoluminescence signal intensity. PEF can be applied to improve the performance of fluorescence-based measurements in the fields of chemistry, 1 , 2 biology, 3 , 4 materials, 5 , 6 photonics, 1 , 7 and medicine. 8 , 9 Metal nanoparticles are particularly useful for PEF applications, as their LSPRs 7 , 10 , 11 can be adjusted by their geometry 7 , 10 , 11 in addition to the application of an external electric field, in combination with semiconductor materials, as reported previously.…”

Section: Introductionmentioning

confidence: 99%

Electric Field Tunability of Photoluminescence from a Hybrid Peptide–Plasmonic Metal Microfabricated Chip

Almohammed

Orhan

Daly

et al. 2021

JACS Au

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Enhancement of fluorescence through the application of plasmonic metal nanostructures has gained substantial research attention due to the widespread use of fluorescence-based measurements and devices. Using a microfabricated plasmonic silver nanoparticle–organic semiconductor platform, we show experimentally the enhancement of fluorescence intensity achieved through electro-optical synergy. Fluorophores located sufficiently near silver nanoparticles are combined with diphenylalanine nanotubes (FFNTs) and subjected to a DC electric field. It is proposed that the enhancement of the fluorescence signal arises from the application of the electric field along the length of the FFNTs, which stimulates the pairing of low-energy electrons in the FFNTs with the silver nanoparticles, enabling charge transport across the metal–semiconductor template that enhances the electromagnetic field of the plasmonic nanoparticles. Many-body perturbation theory calculations indicate that, furthermore, the charging of silver may enhance its plasmonic performance intrinsically at particular wavelengths, through band-structure effects. These studies demonstrate for the first time that field-activated plasmonic hybrid platforms can improve fluorescence-based detection beyond using plasmonic nanoparticles alone. In order to widen the use of this hybrid platform, we have applied it to enhance fluorescence from bovine serum albumin and Pseudomonas fluorescens . Significant enhancement in fluorescence intensity was observed from both. The results obtained can provide a reference to be used in the development of biochemical sensors based on surface-enhanced fluorescence.

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Section: Introductionmentioning

confidence: 99%

Electric Field Tunability of Photoluminescence from a Hybrid Peptide–Plasmonic Metal Microfabricated Chip

Almohammed

Orhan

Daly

et al. 2021

JACS Au

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“…Li and co‐workers reported a 230‐fold fluorescence enhancement of rhodamine B by using diffusion‐swelling approach on the CPC [20] . Earlier, we demonstrated a host‐guest chemistry of cucurbituril supported by colloidal photonic crystals for the fluorescence enhancement of rhodamine B [21] . Chen et al .…”

Section: Introductionmentioning

confidence: 63%

“…[20] Earlier, we demonstrated a host-guest chemistry of cucurbituril supported by colloidal photonic crystals for the fluorescence enhancement of rhodamine B. [21] Chen et al reported a hydrophobic building block to construct highperformance CPCs and utilized it for the fluorescence enhancement of quantum dots by 8-fold. [22] In another study Yuan et al reported a 250-fold enhancement in the fluorescent signal of perovskite nanocrystals by using CPCs.…”

Section: Introductionmentioning

confidence: 99%

Colloidal Photonic Crystal‐Enhanced Fluorescence of Gold Nanoclusters: A Highly Sensitive Solid‐state Fluorescent Probe for Creatinine

Thomas

Babu

Chandran

et al. 2022

Chemistry An Asian Journal

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Gold nanoclusters (AuNCs) are an intensely pursued class of fluorophores with excellent biocompatibility, high water solubility, and ease of further conjugation. However, their low quantum yield limits their applications, such as ultra-sensitive chemical or molecular sensing. To address this problem, various strategies have been adopted for augmenting their fluorescence intensity. Herein, we report a facile and scalable approach for the fluorescence enhancement of bovine serum albumin (BSA) capped AuNCs (BSA-AuNCs) using periodic, close-packed polystyrene colloidal photonic crystals (CPCs). The slow photon effect at the bandgap edges is utilized for the increased light-matter interactions and thereby enhancing the fluorescence intensity of the BSA-AuNCs. Compared to the planar polystyrene control sample, the CPC film yielded a 14-fold enhancement in fluorescence intensity. Further, we demonstrated the as-prepared BSA-AuNCs-CPC as a solid-state platform for the highly sensitive and selective fluorescence turn-off detection of creatinine at nanomolar level.

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“…Similarly, Pillai et al also found that the fluorescence intensity of rhodamine B increased when added to CB[7]. When the concentration of CB[7] was 1.5-fold greater than that of rhodamine B, fluorescence intensity was found to increase 6.7-fold . It should be noted that the encapsulation of CB[8] causes a stronger fluorescence enhancement than CB[7], principally because the larger inner void in CB[8] allows the encapsulation of two fluorescent molecules that form a dimer inside, the formation of which affects intramolecular motion …”

Section: Applications Of Cb Homologuesmentioning

confidence: 97%

“…When the concentration of CB [7] was 1.5-fold greater than that of rhodamine B, fluorescence intensity was found to increase 6.7-fold. 96 It should be noted that the encapsulation of CB [8] causes a stronger fluorescence enhancement than CB [7], principally because the larger inner void in CB [8] allows the encapsulation of two fluorescent molecules that form a dimer inside, the formation of which affects intramolecular motion. 97 Due to the advantages of CB encapsulation of fluorescent dyes, their simple and rapid encapsulation by CB, and the extremely stable complexes formed, a new type of CB-based fluorescent probe has been developed.…”

Section: Applications Of Cb Homologuesmentioning

confidence: 99%

Cucurbituril-Oriented Nanoplatforms in Biomedical Applications

Cheng

Luo

Liu

et al. 2020

ACS Appl. Bio Mater.

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Cucucrbituril (CB) belongs to a family of macrocycles that are easily accessible. Their structural specificity provides excellent molecular recognition capabilities, with the ability to be readily chemically modified. Because of these properties, researchers have found CB to be a useful molecular carrier for delivering drug molecules and therapeutic biomolecules. Their significance lies in the fact that CB not only increases the solubility and stability of an encapsulated guest but also provides the possibility to achieve targeted delivery of the guest molecule. Therefore, the emergence of CB undoubtedly provides opportunities for the development of targeted drug delivery in an era where intelligent drugs have attracted considerable attention. It has also been found that CB can enhance fluorescent dyes, allowing the preparation of biosensors with enhanced sensitivity for use in clinical settings. In the present review, the acquisition, properties, and structural modifications of CB are first comprehensively described, and then the value of this macrocycle in applications within the medical field is discussed. In addition, we have also summarized patent applications of CB in this field over recent years, aiming to illustrate the current status of developments of this molecule. Finally, we discuss the challenges faced by CB in the medical field and future trends in its development.

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Photonic band gap effect and dye-encapsulated cucurbituril-triggered enhanced fluorescence using monolithic colloidal photonic crystals

Abstract: Enhanced fluorescence was achieved by tuning the photonic band gaps in colloidal photonic crystals and host–guest chemistry.

Cited by 12 publications

References 31 publications

Electric Field Tunability of Photoluminescence from a Hybrid Peptide–Plasmonic Metal Microfabricated Chip

Electric Field Tunability of Photoluminescence from a Hybrid Peptide–Plasmonic Metal Microfabricated Chip

Colloidal Photonic Crystal‐Enhanced Fluorescence of Gold Nanoclusters: A Highly Sensitive Solid‐state Fluorescent Probe for Creatinine

Cucurbituril-Oriented Nanoplatforms in Biomedical Applications

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