Light‐Driven Rotary Molecular Motors on Gold Nanoparticles

Pollard, Michael M.; Wiel, Matthijs K. J. ter; Delden, Richard A. van; Vicario, Javier; Koumura, Nagatoshi; Brom, Coenraad R. van den; Meetsma, Auke; Feringa, Bernard

doi:10.1002/chem.200800814

Cited by 50 publications

(38 citation statements)

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“…Nobel Lectures our first "nanoscale windmill park" powered by light. [72] It was also the basis for several years of synthesis and surface science studies in order to design av ariety of responsive interfaces. This included the assembly of motors in azimuthal and altitudinal orientations on quartz, Au,etc.…”

Section: Angewandte Chemiementioning

confidence: 99%

The Art of Building Small: From Molecular Switches to Motors (Nobel Lecture)

2017

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Section: Angewandte Chemiementioning

confidence: 99%

The Art of Building Small: From Molecular Switches to Motors (Nobel Lecture)

2017

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“…To date, four different classes of biological applications for AuNPs have been identified: labeling, delivering, heating, and sensing [15]. However, the use of gold nanoparticles was not limited to biological applications and Au-NPs were also successfully employed as scaffolds for molecular recognition of elements and molecules [16], in optoelectronics and data storage [17], in nanotechnology with molecular switches [18] and motors [19], or in light-harvesting assemblies [20,21]. Typically, gold nanoparticles are obtained by chemical reduction of tetrachloroauric acid [22,23].…”

Section: Introductionmentioning

confidence: 99%

Controlled spontaneous generation of gold nanoparticles assisted by dual reducing and capping agents

et al. 2011

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“…Metal NPs can act as light scatterrers and nanoantennas; i.e. as nano-sources of light confined to LSP modes which radiate light into all directions; and they have been used to enhance photophysical and photochemical effects into different photonics materials and devices [12][13][14][15][16][17][18][19][20][21][22] .…”

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Surface Enhanced Visible Absorption of Dye Molecules in the Near-Field of Gold Nanoparticles

Elhani

Ishitobi

Inouye

et al. 2020

Sci Rep

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Surface enhanced absorption is a plasmonic effect parenting to surface enhanced fluorescence and Raman scattering, and it was clearly reported to occur in the infrared region of the spectrum of light. In this paper, we unambiguously show that it also occurs in the visible region of the spectrum by using a dye; i.e. an azo-dye, which exhibits a good light absorption in that region, and gold nanoparticles, which act as plasmonic nanoantennas that capture and re-radiate light, when the azo-dyes and the nanoparticles are incorporated in the bulk of solid films of polymer. In such a configuration, it is possible to use a dye concentration much larger than that of the nanoparticles and absorption path lengths much larger than those of the molecularly thin layers used in surface enhanced effects studies. In addition, the dye undergoes shape and orientation change; i.e. isomerization and reorientation, upon polarized light absorption; and the observation of surface enhanced visible absorption is done by two separate experiments; i.e. UV-visible absorption spectroscopy and photo-induced birefringence, since the signals detected from both experiments are directly proportional to the extinction coefficient of the dye. Both the dye's absorption and photoorientation are enhanced by the presence of the nanoparticles.electrical current when integrated in photovoltaic cells 27 . Gold NPs (Au-NPs) have been used for enhancing photovoltaic properties of dye-sensitized solar cells 28,29 and perovskite solar cells 30 , as well as in photocatalysis and environmental remediation [13][14][15]31,32 , and plasmonic photothermal therapy of cancer 33 as well as applications in imaging, sensing, biology and medicine 20 . Thin films containing photoresponsive units act as transducers that can convert incident light into molecular motion, resulting in numerous applications such as holography and data storage, as well as photomechanics and mass motion and micro-nano machines [34][35][36][37][38][39] , and so on 40,41 . For optically thin films, increasing the absorption results in improved transduction. In this paper, we report on the plasmonic enhancement of absorption and photo-orientation of azo-dye molecules in the presence of Au-NPs embedded in solid polymer films. The azo-dyes absorb visible light efficiently and undergo molecular shape change; i.e. trans ↔cis photoisomerization, and reorientation upon light absorption; i.e. photoorientation 42,43 .Azo-dye containing materials have been studied extensively in the past decades owing to interest in both fundamental and applications aspects [44][45][46][47][48][49] , and recent reviews provide a comprehensive view about the progress of research in this field 40,41 , and few studies reported the use of metal and semi-conductor NPs to enhance optical storage in azo-polymers 50,51 . The study reported in this paper is along the series of the studies, carried out by our group, which combine photo-reactivity in layered dielectric organic materials and plasmonic materials, including metals and ...

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Light‐Driven Rotary Molecular Motors on Gold Nanoparticles

Cited by 50 publications

References 80 publications

The Art of Building Small: From Molecular Switches to Motors (Nobel Lecture)

The Art of Building Small: From Molecular Switches to Motors (Nobel Lecture)

Controlled spontaneous generation of gold nanoparticles assisted by dual reducing and capping agents

Surface Enhanced Visible Absorption of Dye Molecules in the Near-Field of Gold Nanoparticles

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