Coupling between Molecular and Plasmonic Resonances in Freestanding Dye−Gold Nanorod Hybrid Nanostructures

Ni, Weihai; Liu, Yang; Chen, Huanjun; Li, Li; Wang, Jianfang

doi:10.1021/ja8012374

Cited by 181 publications

(224 citation statements)

References 12 publications

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“…5D, their extinction peaks overlap the absorption peak of the azobenzene molecule. Because coupling strength has been found to be strongly dependent on the spectral overlap between the molecular and plasmonic resonances (33,34), there is, accordingly, a large coupling strength between azobenzene and the plasmonic resonance of both Ag nanospheres and nanowires. However, Ag nanoprisms give a peak located at 820 nm, which does not overlap with the absorption peak of azobenzene.…”

Section: Resultsmentioning

confidence: 99%

Using silver nanowire antennas to enhance the conversion efficiency of photoresponsive DNA nanomotors

Yuan

Zhang²,

Chen³

et al. 2011

Proc. Natl. Acad. Sci. U.S.A.

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Plasmonic near-field coupling can induce the enhancement of photoresponsive processes by metal nanoparticles. Advances in nanostructured metal synthesis and theoretical modeling have kept surface plasmons in the spotlight. Previous efforts have resulted in significant intensity enhancement of organic dyes and quantum dots and increased absorption efficiency of optical materials used in solar cells. Here, we report that silver nanostructures can enhance the conversion efficiency of an interesting type of photosensitive DNA nanomotor through coupling with incorporated azobenzene moieties. Spectral overlap between the azobenzene absorption band and plasmonic resonances of silver nanowires increases light absorption of photon-sensitive DNA motor molecules, leading to 85% close-open conversion efficiency. The experimental results are consistent with our theoretical calculations of the electric field distribution. This enhanced conversion of DNA nanomotors holds promise for the development of new types of molecular nanodevices for light manipulative processes and solar energy harvesting.energy conversion | localized surface plasmon | photo-driven nanomotor P lants harvest solar energy by photosynthesis, in which photosensitive biomolecules absorb energy from sunlight and convert it into chemical energy. Human beings utilize solar energy by fossil fuels, solar thermal systems, and, most frequently nowadays, by photovoltaic systems based on optoelectric materials (1). The design of new synthetic materials coupled with a mechanism to capture, convert, and store photon energy will provide new ways to utilize solar energy (2, 3). However, achieving high conversion efficiency remains a challenge in such energy conversion systems.Recently, DNA has received attention in material sciences, especially for the fabrication of nanomachines able to perform nanoscale movements in response to external stimuli (4-11). Experimental and theoretical studies on single DNA nanomachines have led to the development of new energy conversion strategies (12, 13). As one of the most popular phototransformable molecules, azobenzene and its derivatives can change the overall structure by cis-trans isomerisation mechanism. Using the photoisomerization of azobenzene to photo-regulate DNA hybridization, (14) we have designed a single-molecule light-driven DNA nanomotor (15) for the continuous production of energy in the form of mechanical work. This photon-fueled nanomotor is simple and easy to operate, promising a unique approach to harvest photonic energy. Herein, azobenzene derivatives act as element for energy absorption and DNA molecules movement act for mechanical energy export. As we know, solar thermal technology is a technology to harvest solar thermal energy that converts solar energy to movement of molecules and then produces heat caused by molecule thermal moving. In our design, solar energy is converted to close-open movement of DNA molecules. However, few DNA motor molecules can undergo the close-open conversion as a result of the low p...

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Section: Resultsmentioning

confidence: 99%

Using silver nanowire antennas to enhance the conversion efficiency of photoresponsive DNA nanomotors

Yuan

Zhang²,

Chen³

et al. 2011

Proc. Natl. Acad. Sci. U.S.A.

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“…9, 13-18 Nanophase segregation of bi-component organic shells, or self-assembled monolayers (SAMs), on nanoparticles is a straightforward way to reach such asymmetric nano-objects. 14,[19][20][21][22] Hence, identifying the driving forces at play toward phase separation in nanoscaled SAMs can help to select the optimal components for the design of dissymetric particles. This fundamental knowledge will ultimately yield better understanding of structure-property relationships of inorganic/organic hybrid nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Nanophase Segregation of Self-Assembled Monolayers on Gold Nanoparticles

et al. 2017

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Nanophase segregation of a bi-component thiol self-assembled monolayer is predicted using atomistic molecular dynamics simulations and experimentally confirmed. The simulations suggest the formation of domains rich in acid-terminated chains, on one hand, and of domains rich in amide-functionalized ethylene glycol oligomers, on the other hand. In particular, within the amide-ethylene glycol oligomers region, a key role is played by the formation of inter-chain hydrogen bonds. The predicted phase segregation is experimentally confirmed by the synthesis of 35 and 15 nm gold nanoparticles functionalized with several binary mixtures of ligands. An extensive study by transmission electron microscopy and electron tomography using silica selective heterogeneous nucleation on acid-rich domains to provide electron contrast supports simulations and highlights patchy nanoparticles with a trend towards Janus nano-objects depending on the nature of the ligands and the particle size. These results validate our computational platform as an effective tool to predict nanophase separation in organic mixtures on a surface and drive further exploration of advanced nanoparticle functionalization.

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“…15 The original meaning of hybrid is the offspring of two different species or varieties of animals or plants. This definition should let us recall remarkably a different inner structure and novel physical properties that would be different from original material components.…”

Section: Introductionmentioning

confidence: 99%

“…This definition should let us recall remarkably a different inner structure and novel physical properties that would be different from original material components. Hybridized materials are roughly divided into three categories: 15 (1) inorganicinorganic systems such as metal alloys and semiconductormetal systems, (2) organic organic combinations like polymer blends and polymer alloys, 6 and (3) organicinorganic (metal, semiconductor, ceramics, carbon material, and so on) hybridized materials, 15 e.g., polymer composites, organic silica, etc. For example, polymer blends and polymer composites are commonly produced by the following techniques:…”

Section: Introductionmentioning

confidence: 99%

Hybridized Organic Nanocrystals for Optically Functional Materials

Oikawa¹

2011

Bulletin of the Chemical Society of Japan

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Organic nanocrystals (NCs) are in the mesoscopic phase between a single molecule and the corresponding bulk crystals, and are expected to exhibit peculiar optical properties, depending on crystal size and shape. In the present Award Accounts, recent progress on hybridized organic NCs and ordered array structure of encapsulated organic NCs will be introduced in detail for optically functional materials toward next-generation organic device application. Hybrid material (or hybridization) is an important area in current material science. Our attention is now focused on coreshell type hybridized organic NCs, which seem to be the best suited nanostructure for providing novel optoelectronic properties and photonic function induced by coreshell interface interaction. On the other hand, it may be necessary to arrange and integrate organic NCs, including hybridized materials, on a substrate so as to receive and transmit input and output signals by electronically and/or optically accessing organic devices. Hence, encapsulations of organic NCs, patterned substrates, and tapered cell method have been employed suitably to fabricate and control ordered array structure of organic NCs on a substrate. Finally, the future scope in the relevant fields of optoelectronics and photonics will be discussed in brief.

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Coupling between Molecular and Plasmonic Resonances in Freestanding Dye−Gold Nanorod Hybrid Nanostructures

Cited by 181 publications

References 12 publications

Using silver nanowire antennas to enhance the conversion efficiency of photoresponsive DNA nanomotors

Using silver nanowire antennas to enhance the conversion efficiency of photoresponsive DNA nanomotors

Nanophase Segregation of Self-Assembled Monolayers on Gold Nanoparticles

Hybridized Organic Nanocrystals for Optically Functional Materials

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