Tubular Hybrids: A Nanoparticle—Molecular Network

Ranjan, Priyadarshi; Shankar, Sreejith; Popovitz‐Biro, Ronit; Cohen, Sidney R.; Pinkas, Iddo; Tenne, Reshef; Lahav, Michal; Boom, Milko E. van der

doi:10.1021/acs.langmuir.7b03125

Cited by 5 publications

(17 citation statements)

References 40 publications

(57 reference statements)

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“…The group observed radial elastic moduli of ∼4 GPa. 42 He et al investigated freestanding monolayers of 12T-capped GNPs (5 nm diameter) using AFM nanoindentation and observed values between 1 and 14 GPa, yielding the same average elastic modulus of ∼4 GPa. 24 Both values are in good agreement with the values observed in our study for the longer cross-linkers.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Tuning the Elasticity of Cross-Linked Gold Nanoparticle Assemblies

Schlicke¹,

Kunze²,

Finsel³

et al. 2019

J. Phys. Chem. C

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Composite materials of organically stabilized or cross-linked metal nanoparticles represent a versatile material class with manifold potential applications. Numerous studies explored their tunable optical and charge transport properties. However, due to challenging experimental requirements, only a few studies addressed their mechanical properties. Here, we report the first investigation on the tunability of the elastic properties of cross-linked gold nanoparticle (GNP) composites. Thin films consisting of GNPs (diameter 3–4 nm) cross-linked with α,ω-alkanedithiols of different chain length, as well as 1,4-benzenedithiol, were fabricated by spin-coating and transferred onto circular apertures with diameters of ∼100 μm. The mechanical properties of thus-prepared freestanding membranes with thicknesses between 21 and 51 nm were probed using bulge tests with atomic force microscopy (AFM) based deflection readout. We demonstrate that, along with their optical and charge transport characteristics, the elastic modulus of these GNP composites can be adjusted in a range from ∼3.6 to ∼10 GPa by shortening the α,ω-alkanedithiol chain length from 10 to 3 methylene units. These variations in elasticity are attributed to the varying fraction of soft organic matter and to structural differences within the composites. Our results provide a basis for further experimental and theoretical studies, as well as for applications of cross-linked nanoparticle composites in future micro- and nanoelectromechanical (MEMS/NEMS) devices, their design, and modeling.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Tuning the Elasticity of Cross-Linked Gold Nanoparticle Assemblies

Schlicke¹,

Kunze²,

Finsel³

et al. 2019

J. Phys. Chem. C

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show abstract

“…[25,[29][30][31] In general, elastic moduli in the low GPa range were observed for composites of ligandstabilized, polymer-grafted and organically cross-linked GNPs. [28,[31][32][33] Recently, we demonstrated the tunability of the elasticity of α,ω-alkanedithiol (ADT) cross-linked GNP membranes by adjusting the chain length of the ADT cross-linker. [33] Being comparable to polymers, the elastic modulus of GNP membranes is significantly lower than that of conventional strain sensing materials, such as metals or crystalline semiconductors, and of purely inorganic nanomembranes such as graphene or transition metal dichalcogenides (TMDs).…”

Section: Introductionmentioning

confidence: 99%

“…[ 25,29–31 ] In general, elastic moduli in the low GPa range were observed for composites of ligand‐stabilized, polymer‐grafted and organically cross‐linked GNPs. [ 28,31–33 ] Recently, we demonstrated the tunability of the elasticity of α,ω‐alkanedithiol (ADT) cross‐linked GNP membranes by adjusting the chain length of the ADT cross‐linker. [ 33 ]…”

Section: Introductionmentioning

confidence: 99%

Cross‐Linked Gold Nanoparticle Composite Membranes as Highly Sensitive Pressure Sensors

Schlicke

Kunze²,

Rebber³

et al. 2020

Adv Funct Materials

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In this article, highly sensitive differential pressure sensors based on freestanding membranes of cross-linked gold nanoparticles are demonstrated. The nanoparticle membranes are employed as both diaphragms and resistive transducers. The elasticity and the pronounced resistive strain sensitivity of these nanometer-thin composites enable the fabrication of sensors achieving high sensitivities exceeding 10 −3 mbar −1 while maintaining an overall small membrane area. Furthermore, by combining micro-bulge tests with atomic force microscopy and in situ resistance measurements the membranes' electromechanical responses are studied through precise observation of the concomitant changes of the membranes' topography. The study demonstrates the high potential of free-standing nanoparticle composites for the fabrication of highly sensitive force and pressure sensors and introduces a unique and powerful method for the electromechanical investigation of these materials.

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“…29−35 The use of homogeneous inorganic nano- and microstructures as the template can result in a new approach to generate metallic structures with a high uniformity and useful mechanical properties. 14,36…”

Section: Discussionmentioning

confidence: 99%

“…The overall structure of these single-walled tubular assemblies resemble that of the inorganic template. 14…”

Section: Introductionmentioning

confidence: 99%

Metallic Nanocrystal Ripening on Inorganic Surfaces

et al. 2018

Self Cite

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In this paper, we demonstrate the formation of hybrid nanostructures consisting of two distinctive components mainly in a one-to-one ratio. Thermolysis of inorganic nanotubes (INT) and closed-cage, inorganic fullerene-like (IF) nanoparticles decorated with a dense coating of metallic nanoparticles (M = Au, Ag, Pd) results in migration of relatively small NPs or surface-enhanced diffusion of atoms or clusters, generating larger particles (ripening). AuNP growth on the surface of INTs has been captured in real time using in situ electron microscopy measurements. Reaction of the AuNP-decorated INTs with an alkylthiol results in a chemically induced NP fusion process at room temperature. The NPs do not dissociate from the surfaces of the INTs and IFs, but for proximate IFs we observed fusion between AuNPs originating from different IFs.

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Tubular Hybrids: A Nanoparticle—Molecular Network

Cited by 5 publications

References 40 publications

Tuning the Elasticity of Cross-Linked Gold Nanoparticle Assemblies

Tuning the Elasticity of Cross-Linked Gold Nanoparticle Assemblies

Cross‐Linked Gold Nanoparticle Composite Membranes as Highly Sensitive Pressure Sensors

Metallic Nanocrystal Ripening on Inorganic Surfaces

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