Light-Controllable Surface Plasmon Resonance Absorption of Gold Nanoparticles Covered with Photochromic Diarylethene Polymers

Nishi, Hidetaka; Asahi, Tsuyoshi; Kobatake, Seiya

doi:10.1021/jp906371k

Cited by 64 publications

(66 citation statements)

References 54 publications

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“…[192] Complex architectures can be designed to make possible energy transfers between photochromic dyes and other luminescent species such as Quantum Dots, [193] up-converting nanocrystals [194][195][196] or plasmonic metal nanoparticles. [197,198] One nice example is the decoration of CdSe/ZnS QDs with an amphiphilic photochromic polymer coating. [199] The coreshell architecture permits the accommodation of hydrophobic acceptor dyes in a close proximity to the QD donor, thereby providing an effective FRET probe in a small (∼7 nm diame- Figure 18.…”

Section: Figure 12mentioning

confidence: 99%

Optical Properties of Hybrid Organic‐Inorganic Materials and their Applications

Parola

Julián‐López

Carlos

et al. 2016

Adv Funct Materials

230

116

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Research on hybrid inorganic‐organic materials has experienced an explosive growth since the 1980s, with the expansion of soft inorganic chemistry based processes. Indeed, mild synthetic conditions, low processing temperatures provided by “chimie douce” and the versatility of the colloidal state allow for the mixing of the organic and inorganic components at the nanometer scale in virtually any ratio to produce the so called hybrid materials. Today a high degree of control over both composition and nanostructure of these hybrids can be achieved allowing tunable structure‐property relationships. This, in turn, makes it possible to tailor and fine‐tune many properties (mechanical, optical, electronic, thermal, chemical…) in very broad ranges, and to design specific multifunctional systems for applications. In particular, the field of “Hybrid‐Optics” has been very productive not only scientifically but also in terms of applications. Indeed, numerous optical devices based on hybrids are already in, or very close, to the market. This review describes most of the recent advances performed in this field. Emphasis will be given to luminescent, photochromic, NLO and plasmonic properties. As an outlook we show that the controlled coupling between plasmonics and luminescence is opening a land of opportunities in the field of “Hybrid‐Optics”.

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Section: Figure 12mentioning

confidence: 99%

Optical Properties of Hybrid Organic‐Inorganic Materials and their Applications

Parola

Julián‐López

Carlos

et al. 2016

Adv Funct Materials

230

116

View full text Add to dashboard Cite

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“…These positive and negative contributions of the SPR can be analyzed as a broadening coupled to a small wavelength shift of the SPR bands. This effect is rationalized by the fact that the SPR resonance depends not only on the gold nanoparticle size and shape but also on external factor such as the surrounding medium [24]. In our case, the photochromic reaction induces a modification of the B2629 conformation, changing the local refractive index of the photochromic species surrounding the GNRs.…”

Section: Resultsmentioning

confidence: 70%

Importance of Gold Nanorods’ Aggregation in Surface Plasmon Coupling with a Photochromic Film in Hybrid Structures

2015

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In this paper, hybrid samples composed of photochromic film deposited on glass substrates functionalized with gold nanorods were synthesized. Three samples of gold nanorods with different aspect ratios were produced and characterized by electron microscopy and extinction spectroscopy. The rod populations were chosen to have more or less overlap between the two surface plasmon resonance bands and the absorption band of the colored form of the photochromic compounds which is commercially available. Deposition of the nanoparticles on glass substrate exhibits a new surface plasmon resonance coupling band coming from their side-by-side organization. Spectroscopic studies of the photoisomerization process of photochromic film spin-coated on the gold nanorods show reversible interaction between photochromism and plasmonic properties. Despite such coupling has been previously reported emphasizing the main role of the bands overlapping, in this paper, we clearly show that the surface resonance coupling band is the key parameter to monitor the photochromic process. This result emphasizes the importance of coupling nanoparticles to increase their sensing potential and interaction with photochromic molecules.

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“…This shift is connected with the local electric field generated by the surface plasmon resonance of Au nanoparticles. The position of the absorption band of the local surface plasmon resonance strongly depends on the size of the Au particles [134]. The photocycloreversible reaction is enhanced in the vicinity of the Au nanoparticle [135].…”

Section: Scheme 89mentioning

confidence: 99%

Nanophotochromism

Barachevsky¹

2015

Organic Photonics and Photovoltaics

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Abstract:The review presents the state-of-the-art analysis of investigations in the field of a new line of research of photochromism -nanophotochromism. The design, properties, and possible applications of photochromic nanoparticles prepared by different methods with the use of photochromic substances (aggregates, host-guest, and polymer systems, solid nanoparticles) as well as core-shell photochromic nanostructures based on polymers, silica, quantum dots, doped upconversion nanocrystals, and Ag, Au, etc. nanoparticles have been reviewed. Keywords: photochromism; photochromic nanoparticles; core-shell photochromic nanoparticles design; photoswitching; aggregates; polymer systems, host-guest systems IntroductionPhotochromism is a very important phenomenon for different applications in photonics. The applications are based on reversible phototransformations of photochromic compounds between two states and changes of their properties that accompany these transformations At present, systems and materials containing photochromic nanopatricles have become highly significant. Among these are nanodimensional particles of photochromic substances, including aggregates, and coreshell systems. As a core, inorganic nanoparticles of gold, silver, metal oxides, quantum dots (QD), and also polymeric nanoparticles are used. The shell consists of photochromic molecules or their aggregates connected to a core surface either chemically or physically. Photochromic nanoparticles with photocontrolled fluorescence arouse a special interest because the fluorescence technique is becoming a leading strategy in biological diagnosis, imaging, and detection applications. This paper is a state-of-the-art review which presents results of studying photochromic nanoparticles including author's own data. The results of earlier research are also surveyed in some other reviews [1][2][3][4][5][6][7][8][9][10][11][12][13]. Photochromic nanoparticles:properties and applications Nanoparticles based on photochromic substances AggregatesThe most known photochromic nanoparticles are aggregates of photochromic organic compounds [14]. These compounds experience reversible photoinduced transformations between two states, Sch. 1A and Sch. 1B. Scheme 1The photoinduced colored merocyanine form B absorbing visible irradiation is formed from a colorless form A as a result of photodissociation of the -C-O-bond of the pyran heterocycle under UV radiation, and this is followed by spontaneous isomerization of the cis-form to the trans one. The colored form B can be converted back to the initial colorless form A upon absorption of visible light or spontaneously during the dark relaxation, which is accelerated by heating.The J-aggregates of nitro-substituted indoline spiropyrans Sch. 2 with long alkyl substituents are of special interest [15].The narrow absorption bands of J-aggregates of these photochromic compounds (Fig. 1) made it possible prepare a specimen of the multilayered optical disk providing freUnauthenticated Download

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Light-Controllable Surface Plasmon Resonance Absorption of Gold Nanoparticles Covered with Photochromic Diarylethene Polymers

Cited by 64 publications

References 54 publications

Optical Properties of Hybrid Organic‐Inorganic Materials and their Applications

Optical Properties of Hybrid Organic‐Inorganic Materials and their Applications

Importance of Gold Nanorods’ Aggregation in Surface Plasmon Coupling with a Photochromic Film in Hybrid Structures

Nanophotochromism

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