Ligand-induced twisting of nanoplatelets and their self-assembly into chiral ribbons

Jana, Santanu; Frutos, M. de; Davidson, Patrick; Abécassis, Benjamin

doi:10.1126/sciadv.1701483

Cited by 94 publications

(157 citation statements)

References 44 publications

(53 reference statements)

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“…For example, the evaporation‐induced self‐assembly of Ag nanoprisms into 2–3 µm long helical columnar structures has been reported (Figure C), which was attributed to the strong binding thiol chiral ligand . Similarly, it has been demonstrated that chiral molecules can induce the twisting of CdSe nanoscale platelets into chiral ribbons with a pitch of ≈ 400 nm . In a very different manner, the illumination of racemic CdTe NPs with right‐ or left‐handed circularly polarized light (CPL) induced the assembly of right‐ or left‐handed twisted ribbons, with total lengths of 3 ± 0.5 µm and pitch lengths of 800 ± 20 nm .…”

Section: The Chiroptical Effects For Different Nanostructuresmentioning

confidence: 98%

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Chirality‐Based Biosensors

Wang

et al. 2018

Adv Funct Materials

114

120

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The fabrication of chiral nanostructures gives rise to characteristic chiroptical activity, which can be used for chirality-based biosensors. Great progress is made in the use of nanoassemblies for the construction of chiral nanoparticle dimers, pyramids, helices, and twisted structures, and their chiroptical activities correlate with diverse structural geometries and enantiomeric configurations. In DNA-hybridization-based chiral nanoassemblies, the assembly parameters, such as the components, gaps, multicomponents, and the aftergrowth of metal, can result in multiple bands and enhanced chiroptical effects. Based on known chiral nanostructures, the existing chiral nanoassembly-based biosensors together with their targets and signal amplification strategies are reviewed. Chirality involves multiple signals, and multitarget biosensors are introduced with newly developed chiral architectures for the accurate and reliable monitoring of biomarkers in living cells. The interactions between chiral nanoarchitectures and biosystems are also highlighted, which are important not only in the chiral dynamic switching of nano-objects for biomonitoring, but also in manipulating cell growth, proliferation, and adhesion. The future perspectives on chiral fabrication and its use in biosensors are also comprehensively discussed. and future perspectives in chiral fabrication to enhance the chiroptical properties for emerging biosensors application.

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Section: The Chiroptical Effects For Different Nanostructuresmentioning

confidence: 98%

“…. The chiral architectures (NP dimers, pyramids, and helices) so far reported have involved DNA, proteins, peptides, fibers, supermolecules, inorganic pores, and template‐free (interparticle forces, evaporation, or light,) assemblies.…”

Section: Introductionmentioning

confidence: 99%

Chirality‐Based Biosensors

Wang

et al. 2018

Adv Funct Materials

114

120

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“…Ligand surface coverage can greatly influence the structures of 2D SNMs . Abécassis et al found that the prepared stacked CdSe nanoplate superstructure would spontaneously twist upon the addition of oleic acid ligands, resulting in chiral ribbon superstructures several micrometers in length . The increasing surface strain induced by the ligand accounted for the morphological transition.…”

Section: Ligand Effects On Snmsmentioning

confidence: 99%

“…Meanwhile, the flexibility might also be influenced by the surface ligand. In addition, ligand can also influence the behavior in the process of catalysis, self‐assembling, optics, etc., and it has been revealed that both the ligand type and ligand coverage play essential roles in properties. These features have seldom been observed in the materials with larger sizes.…”

Section: Introductionmentioning

confidence: 99%

The Sub‐Nanometer Scale as a New Focus in Nanoscience

2018

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Size is one of the central issues in nanoscience. The practical meaning of the term "sub-nanometric material (SNM)" requires two aspects: (1) its size should be at the atomic level; (2) it shows unique (size-related) properties compared to its nano-counterparts with larger sizes. Here, SNMs in the form of wires (SNWs) and the unique properties arising from their special size are reviewed. First, their polymer-like behavior, including rheological behavior and self-assembly, is dicussed. Their origins may stem from the special size and the ligands around the wire. Even a slight increase in diameter would risk the polymer-like behavior. Meanwhile, the ligands on SNWs are proportional to the inorganic entity at this scale. Consequently, surface ligands should have a profound impact on the properties, like catalysis, self-assembly, optics, etc. To reveal more potential applications, their applications in energy conversion are comprehensively reviewed. To some extent, characterization can greatly influence the way things are observed. Thus, some appropriate characterization techniques are briefly introduced. Finally, another emerging part of SNWs (atomic chain material) is briefly introduced. It is hoped that this review can provide new insights to this special scale.

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“…These chiral molecules and their mirror images (enantiomers) exhibit opposite handedness when interacting with circularly polarized light, as well as different chemical and biological performance. Inspired by chiral molecular structures, researchers are developing strategies to build artificial chiral materials by mimicking molecular structures using functional materials [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Specifically, metal nanomaterials exhibit tailorable optical properties upon excitation of surface plasmons and become one of the most promising components to realize of chiral optical metamaterials [15,16].…”

Section: Introductionmentioning

confidence: 99%

All-optical reconfigurable chiral meta-molecules

et al. 2019

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Chirality is a ubiquitous phenomenon in the natural world. Many biomolecules without inversion symmetry such as amino acids and sugars are chiral molecules. Measuring and controlling molecular chirality at a high precision down to the atomic scale are highly desired in physics, chemistry, biology, and medicine, however, have remained challenging. Herein, we achieve alloptical reconfigurable chiral meta-molecules experimentally using metallic and dielectric colloidal particles as artificial atoms or building blocks to serve at least two purposes. One is that the ondemand meta-molecules with strongly enhanced optical chirality are well-suited as substrates for surface-enhanced chiroptical spectroscopy of chiral molecules and as active components in optofluidic and nanophotonic devices. The other is that the bottom-up-assembled colloidal metamolecules provide microscopic models to better understand the origin of chirality in the actual atomic and molecular systems.

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Ligand-induced twisting of nanoplatelets and their self-assembly into chiral ribbons

Abstract: Organic ligands can induce twist on nanometer-thin crystalline platelets and on their self-assembled ribbons.

Cited by 94 publications

References 44 publications

Chirality‐Based Biosensors

Chirality‐Based Biosensors

The Sub‐Nanometer Scale as a New Focus in Nanoscience

All-optical reconfigurable chiral meta-molecules

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