Nanoparticles functionalised with reversible molecular and supramolecular switches

Klajn, Rafał; Stoddart, J. Fraser; Grzybowski, Bartosz A.

doi:10.1039/b920377j

Cited by 501 publications

(362 citation statements)

References 309 publications

(428 reference statements)

Supporting

Mentioning

356

Contrasting

Unclassified

Order By: Relevance

“…Nanoparticles (NPs) of different materials (gold, silver, metal oxides, etc.) can be coated with selfassembled monolayers (SAMs) of a given molecular system, thereby providing them additional functions such as a specific surface energy or optoelectronic properties (6)(7)(8). These features can be optimized by achieving control over the packing of SAMs on the NPs (7).…”

mentioning

confidence: 99%

Optically switchable organic field-effect transistors based on photoresponsive gold nanoparticles blended with poly(3-hexylthiophene)

Raimondo

Crivillers

Reinders

et al. 2012

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

View full text Add to dashboard Cite

Interface tailoring represents a route for integrating complex functions in systems and materials. Although it is ubiquitous in biological systems-e.g., in membranes-synthetic attempts have not yet reached the same level of sophistication. Here, we report on the fabrication of an organic field-effect transistor featuring dualgate response. Alongside the electric control through the gate electrode, we incorporated photoresponsive nanostructures in the polymeric semiconductor via blending, thereby providing optical switching ability to the device. In particular, we mixed poly(3-hexylthiophene) with gold nanoparticles (AuNP) coated with a chemisorbed azobenzene-based self-assembled monolayer, acting as traps for the charges in the device. The light-induced isomerization between the trans and cis states of the azobenzene molecules coating the AuNP induces a variation of the tunneling barrier, which controls the efficiency of the charge trapping/detrapping process within the semiconducting film. Our approach offers unique solutions to digital commuting between optical and electric signals.O rganic field-effect transistors (OFETs) are basic building blocks for logic applications and for the development of electronic technologies based on soft matter (1-4). Currently, the greatest challenges in the field are the achievement of higher device performance and the development of devices featuring uncommon and multiple functionalities (5). In this regard, hybrid organic-inorganic materials are gaining much attention because, besides their easy processing, they can take advantage of the tunability of the chemical properties of the components, and thus of the material as a whole. Nanoparticles (NPs) of different materials (gold, silver, metal oxides, etc.) can be coated with selfassembled monolayers (SAMs) of a given molecular system, thereby providing them additional functions such as a specific surface energy or optoelectronic properties (6-8). These features can be optimized by achieving control over the packing of SAMs on the NPs (7). When NPs are integrated in a device, they can, for example, act as charge storage sites-i.e., trapping charges centers, allowing the system to act as a memory (9, 10).The incorporation of photochromic molecules into electronic devices to confer them a photoresponsive nature has been recently explored (11)(12)(13)(14). Among photochromic systems (15-18), azobenzene derivatives are known to undergo isomerization from trans to cis form, and vice versa, under illumination at a specific wavelength, as well as from cis to trans with temperature (15). In the last few years, we have extensively investigated the thiol-substituted azo-biphenyl (AZO, Fig. 1A) when chemisorbed on gold surfaces (19)(20)(21)(22). We demonstrated that such a SAM chemisorbed on the planar source and drain electrodes of an OFET can be used to modulate optically the charge injection at the metal-semiconductor interface because of the different tunneling barrier of the cis and trans SAMs (19). However, the observed light-modul...

show abstract

mentioning

confidence: 99%

Optically switchable organic field-effect transistors based on photoresponsive gold nanoparticles blended with poly(3-hexylthiophene)

Raimondo

Crivillers

Reinders

et al. 2012

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

View full text Add to dashboard Cite

show abstract

“…[36][37][38][39][40] Furthermore, in the research of new chemical sensors, systems that exhibit improved selectivity only when different elements are all present, due to strong intermolecular interactions, have entered the spotlight. Ditopic sensors demonstrate recognition function only when two types of guest molecules are present, which promote supramolecular complex formation.…”

Section: Supramolecular Chirality Exhibited By Supramolecular CD Compmentioning

confidence: 99%

Development of Supramolecular Saccharide Sensors Based on Cyclodextrin Complexes and Self-assembling Systems

Tsuchido

Fujiwara

Hashimoto

et al. 2017

CHEMICAL & PHARMACEUTICAL BULLETIN

View full text Add to dashboard Cite

Cyclodextrins (CDs) are water-soluble host compounds having nano-size hydrophobic cavities that enable them to incorporate organic molecules in water. Optically inert CDs can be efficiently combined with various types of chromoionophores and fluoroionophores. In this study, using diverse combinations of phenylboronic acid fluorescent sensors and azoprobes with CDs, the unique saccharide recognition functions of CD, chemically modified CD, and CD gel complexes based on their synergistic function are clarified, thereby confirming their use as supramolecular saccharide sensors. To realize novel supramolecular chirality, the twisted structure of two ditopic azoprobes inside the γ-CD chiral cavity is controlled by multi-point recognition of guest ions in water. As different types of supramolecular saccharide sensors, phenylboronic acidbased self-assembling systems are also reviewed.

show abstract

“…41 The radical nature of BIPY •+ units is promising for design of functional composite materials, useful for conductive molecular electronic devices 42 or paramagnetic materials. 43,44 However, an inconvenience for these applications is the low resistance of BIPY •+ radical cations to oxidation by atmospheric oxygen.…”

Section: +mentioning

confidence: 99%

Radical-radical rotaxanes with tetracationic cyclophane ring, and quaternary azaaromatic rotaxanes with cage macrocycles

Deska¹,

Nowik-Zając²,

Śliwa³

2014

Arkivoc

View full text Add to dashboard Cite

The review consists of two parts. In the first part the radical-radical quaternary azaaromatic rotaxanes containing tetracationic cyclophane ring are described, and in the second part rotaxanes built from quaternary azaaromatic threads and cage macrocycles, such as cyclodextrins, calixarenes, pillararenes and cucurbiturils are presented. The species described here are discussed as regards their properties and possible applications.

show abstract

Nanoparticles functionalised with reversible molecular and supramolecular switches

Cited by 501 publications

References 309 publications

Optically switchable organic field-effect transistors based on photoresponsive gold nanoparticles blended with poly(3-hexylthiophene)

Optically switchable organic field-effect transistors based on photoresponsive gold nanoparticles blended with poly(3-hexylthiophene)

Development of Supramolecular Saccharide Sensors Based on Cyclodextrin Complexes and Self-assembling Systems

Radical-radical rotaxanes with tetracationic cyclophane ring, and quaternary azaaromatic rotaxanes with cage macrocycles

Contact Info

Product

Resources

About