Phase Separation in Liquid Metal Nanoparticles

Tang, Shi‐Yang; Mitchell, David R. G.; Zhao, Qianbin; Yuan, Dan; Yun, Guolin; Zhang, Yuxin; Qiao, Ruirui; Lin, Yiliang; Dickey, Michael D.; Li, Weihua

doi:10.1016/j.matt.2019.03.001

Cited by 124 publications

(113 citation statements)

References 48 publications

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“…Such a phase separation enables alloy particles that have stronger heat conductivity over a broad range of temperature than other typical alloy particles. Tang et al reported phase separation of spherical Ga based nanoparticles formed solid‐core/liquid‐shell structure upon lowering temperature. They demonstrated the phase separation not only in binary nanoparticles but also in ternary nanoparticles.…”

Section: Discussionmentioning

confidence: 99%

Ga‐Based Liquid Metal Micro/Nanoparticles: Recent Advances and Applications

Song

Kim

Kang

et al. 2019

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Liquid metals are emerging as fluidic inorganic materials in various research fields. Micro‐ and nanoparticles of Ga and its alloys have received particular attention in the last decade due to their non toxicity and accessibility in ambient conditions as well as their interesting chemical, physical, mechanical, and electrical properties. Unique features such as a fluidic nature and self‐passivating oxide skin make Ga‐based liquid metal particles (LMPs) distinguishable from conventional inorganic particles in the context of synthesis and applications. Here, recent advances in the bottom‐up and top‐down synthetic methods of Ga‐based LMPs, their physicochemical properties, and their applications are summarized. Finally, the current status of the LMPs is highlighted and perspectives on future directions are also provided.

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Section: Discussionmentioning

confidence: 99%

Ga‐Based Liquid Metal Micro/Nanoparticles: Recent Advances and Applications

Song

Kim

Kang

et al. 2019

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160

120

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“…It has been previously shown that in small droplets of liquid Ga, nanocrystal solid phases are always formed near the interfaces . Additionally, a conspicuous phase separation is seen in a reduction of temperature below the eutectic melting point in liquid metal droplets . Here, the dynamic of the system is more complicated, as the system is vigorously sonicated, and energy is constantly applied to it.…”

Section: Resultsmentioning

confidence: 99%

Liquid Metal Droplet and Graphene Co‐Fillers for Electrically Conductive Flexible Composites

Saborío

Cai

Tang

et al. 2019

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Colloidal liquid metal alloys of gallium, with melting points below room temperature, are potential candidates for creating electrically conductive and flexible composites. However, inclusion of liquid metal micro‐ and nanodroplets into soft polymeric matrices requires a harsh auxiliary mechanical pressing to rupture the droplets to establish continuous pathways for high electrical conductivity. However, such a destructive strategy reduces the integrity of the composites. Here, this problem is solved by incorporating small loading of nonfunctionalized graphene flakes into the composites. The flakes introduce cavities that are filled with liquid metal after only relatively mild press‐rolling (<0.1 MPa) to form electrically conductive continuous pathways within the polymeric matrix, while maintaining the integrity and flexibility of the composites. The composites are characterized to show that even very low graphene loadings (≈0.6 wt%) can achieve high electrical conductivity. The electrical conductance remains nearly constant, with changes less than 0.5%, even under a relatively high applied pressure of >30 kPa. The composites are used for forming flexible electrically‐conductive tracks in electronic circuits with a self‐healing property. The demonstrated application of co‐fillers, together with liquid metal droplets, can be used for establishing electrically‐conductive printable‐composite tracks for future large‐area flexible electronics.

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“…The study of optical properties of noble metal assisted-liquid metal nanoparticles will provide multifunctionality to plasmonic response of liquid metals and also makes them chemically stable to some extent which they lack off. The plasmonic response of some liquid metal alloys eutectic gallium indium (EGaIn) for the development of active devices to be functioned over wide region of electromagnetic spectrum has been reported [39,40]. Also, many experimental and theoretical studies have been carried out for synthesization of gallium-based alloys such as gallinstan but as per our knowledge, no study is reported for the plasmonic behavior of elemental liquid metals and their alloys.…”

Section: Discussionmentioning

confidence: 99%

“…Tang et al studied the phase behavior of gallium based liquid metal alloy (EGaIn) at micro-and nano-size scale [39].…”

Section: Research In Progressmentioning

confidence: 99%

Plasmonic Effects in Noble Metal-liquid Metal Based Nanoparticles

Bhardwaj¹,

Verma²

2019

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In the era of flexible and foldable devices, liquid metals emerge as a champion because they are being liquid at or near room temperature in addition to having high electrical and thermal conductivities. Plasmonic resonance occurs when conduction band electrons on metal nanoparticle surface collectively oscillates with same frequency as that irradiated light. This plasmonic resonance has attracted great attention because of large electromagnetic field enhancements near metal nanoparticle and the regulating resonance wavelength with change in material, size, shape and surrounding medium of metallic nanoparticle. Incorporation of liquid metal nanoparticles in plasmonics provides unique properties towards sensing (heart rate monitors etc.) which can become wearable. So, developing liquid metal based low-cost and large-scale plasmonic nanostructures may provide more optical efficiencies, fast kinetics, low temperature processing, versatility, easy embedding in structures and stretchy devices. Present work focuses on literature review highlighting the study of optical properties (absorption and scattering efficiencies, LSPR tunability, Figure of Merit (FOM) and Refractive Index Sensitivity (RIS)) of noble metal-liquid metal nanostructures and future scope of the field. Simulations can be performed on the basis of Mie Theory for spherical nanoparticles and by DDA/FDTD method for non-spherical particles or arrays. The results can help to optimize the plasmonic nanostructures of suitable material, size and shape according to the need of application in particular region of EM spectrum.

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Phase Separation in Liquid Metal Nanoparticles

Cited by 124 publications

References 48 publications

Ga‐Based Liquid Metal Micro/Nanoparticles: Recent Advances and Applications

Ga‐Based Liquid Metal Micro/Nanoparticles: Recent Advances and Applications

Liquid Metal Droplet and Graphene Co‐Fillers for Electrically Conductive Flexible Composites

Plasmonic Effects in Noble Metal-liquid Metal Based Nanoparticles

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