Hyperconnected molecular glass network architectures with exceptional elastic properties

Burg, Joseph A.; Oliver, Mark; Frot, Théo; Sherwood, Mark; Lee, Victor; Dubois, Géraud; Dauskardt, Reinhold H.

doi:10.1038/s41467-017-01305-w

Cited by 26 publications

(110 citation statements)

References 64 publications

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“…In recent years the field of amorphous materials has welcomed newcomers such as organic glasses (Gujral et al, 2018), optically active molecular amorphous materials (Murawski et al, 2018), two-dimensional amorphous materials (Huang et al, 2012(Huang et al, , 2013 and hybrid organic-inorganic networks, providing even more flexibility in designing their physical properties (Burg et al, 2017).…”

Section: The Amorphous Statementioning

confidence: 99%

Towards quantitative treatment of electron pair distribution function

Gorelik

Neder

Terban

et al. 2019

Acta Crystallogr B Struct Sci Cryst Eng Mater

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The pair distribution function (PDF) is a versatile tool to describe the structure of disordered and amorphous materials. Electron PDF (ePDF) uses the advantage of strong scattering of electrons, thus allowing small volumes to be probed and providing unique information on structure variations at the nanoscale. The spectrum of ePDF applications is rather broad: from ceramic to metallic glasses and mineralogical to organic samples. The quantitative interpretation of ePDF relies on knowledge of how structural and instrumental effects contribute to the experimental data. Here, a broad overview is given on the development of ePDF as a structure analysis method and its applications to diverse materials. Then the physical meaning of the PDF is explained and its use is demonstrated with several examples. Special features of electron scattering regarding the PDF calculations are discussed. A quantitative approach to ePDF data treatment is demonstrated using different refinement software programs for a nanocrystalline anatase sample. Finally, a list of available software packages for ePDF calculation is provided.

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Section: The Amorphous Statementioning

confidence: 99%

Towards quantitative treatment of electron pair distribution function

Gorelik

Neder

Terban

et al. 2019

Acta Crystallogr B Struct Sci Cryst Eng Mater

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“…The elastic modulus and the hardness of the adhesive layers with varying Zr/GPTMS ratios are shown in Figure . Elastic modulus and hardness are fundamental material's property and are mainly determined by the network connectivity and bond stiffness . Here, the denser and stiffer inorganic molecular networks formed by TPOZ incorporation lead to increases in both elastic modulus and hardness of the adhesive layer.…”

Section: Resultsmentioning

confidence: 99%

Optically Transparent Protective Coating for Plastics Using Dual Spray and Atmospheric Plasma Deposition

Ding

Dong

Han

et al. 2018

Adv Materials Inter

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deposited coatings are also low because of the low molecular network connectivity.To achieve coatings with better mechanical properties, we recently demonstrated an atmospheric plasma enhanced deposition technique for depositing transparent organosilicate coatings on plastic substrates with tunable mechanical properties. [9][10][11][12] The optimized bilayer coatings exhibited a twofold increase in adhesion energy with poly(methyl methacrylate) (PMMA) and a three-to fivefold improvement in surface hardness compared to the commercial sol-gel polysiloxane coatings. However, the debond interface still remained adhesively at the polymer and coating interface. Coatings with better adhesive properties which can drive cracks to propagate cohesively within the polymer substrate are highly desirable as it can provide better reliability and durability.In this study, we show the successful deposition of a bilayer protective coating on plastics using a combined spray and atmospheric plasma deposition method. A thin highly adhesive inorganic-organic hybrid coating on plastics was deposited using (3-glycidyloxypropyl) trimethoxysilane (GPTMS) and tetrapropyl zirconate (TPOZ) as precursors with spray coating deposition in air. Among different solution-based processing methods, spray deposition is highly desirable for making large-area, uniform coatings on various kinds of substrates through a simple and cost-effective process. [13] It is also able to coat complex 3D microstructures such as cantilevers and nonplanar surfaces for microelectromechanical systems applications. [14,15] It relies less on solution characteristics than substrate-contact based techniques and provides more flexibility on solvent choice, making it a more versatile process with less environment pollution. [16] Once hydrolyzed, the GPTMS precursor can form an inorganic molecular network via condensation reaction and an organic network via epoxide opening polymerization reaction. TPOZ precursor works as an effective catalyst to the epoxide opening reaction [17][18][19] and also acts as an inorganic network former to increase the inorganic network connectivity of the hybrid coating. After curing of the bottom spray layer, a hard top layer was deposited with atmospheric plasma deposition using tetraethyl orthosilicate (TEOS) as the precursor.The successful processing of bilayer protective coatings on plastics using a combined spray and atmospheric plasma deposition method is shown. The base layer is a spray deposited coating with high adhesion using (3-glycidyloxypropyl) trimethoxysilane and tetrapropyl zirconate (TPOZ) precursors. The top dense layer is deposited by atmospheric plasma deposition with a tetraethyl orthosilicate precursor. The coating deposition rate, chemical composition, elastic modulus, hardness, and adhesion to poly(methyl methacrylate) (PMMA) substrates are investigated. The adhesion to the polymer substrate is found to decrease with increasing TPOZ content in the precursor solution, while the elastic modulus and hardness of the base layer ...

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“…Bhattarai et al recently reported that the mean atomic coordination, < r >, determines the Young's modulus of SiOCH films, E , expressed as

E \propto {(italicr > - true〈 < r >_{normalc} true〉)}^{3 / 2}

, where < r > c is the critical coordination of 2.4 for hydrogenated group IV materials, such as SiOCH, and 4.0 for SiC and SiO 2 . The network connectivity thus determines Young's modulus in proportion to a power law with exponent 1.5 . This may allow the prediction of physical sputtering yields and RIE rates …”

Section: Challengesmentioning

confidence: 99%

Review of methods for the mitigation of plasma‐induced damage to low‐dielectric‐constant interlayer dielectrics used for semiconductor logic device interconnects

Miyajima

Ishikawa

Sekine

et al. 2019

Plasma Processes & Polymers

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The developments in advanced interconnect technology for semiconductor logic devices for the mitigation of plasma‐induced damage to low‐dielectric‐constant (low‐k) materials, including fluorosilicate glass and carbon‐doped silicon oxide is reviewed. The chemical bond structures of low‐k materials are summarized to help mitigate the k value degradation caused by moisture uptake after plasma processes. Damage suppression is accomplished by integrating deposition chemistries, pattern etch transfer, and post‐etch cleaning technologies. On the basis of analyses results, a discussion on the bond engineering of low‐k materials and their degradation during plasma processing is given. Challenges facing low‐k interconnect technology are also addressed.

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Hyperconnected molecular glass network architectures with exceptional elastic properties

Cited by 26 publications

References 64 publications

Towards quantitative treatment of electron pair distribution function

Towards quantitative treatment of electron pair distribution function

Optically Transparent Protective Coating for Plastics Using Dual Spray and Atmospheric Plasma Deposition

Review of methods for the mitigation of plasma‐induced damage to low‐dielectric‐constant interlayer dielectrics used for semiconductor logic device interconnects

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