Cancer Diagnostics: A Trachea‐Inspired Bifurcated Microfilter Capturing Viable Circulating Tumor Cells via Altered Biophysical Properties as Measured by Atomic Force Microscopy (Small 18/2013)

Kim, Minseok S.; Kim, Jin Hoon; Lee, Wonho; Cho, Sang-Joon; Oh, Jin-Mi; Lee, June-Young; Baek, Sang-Min; Kim, Yeon Jeong; Sim, Tae Seok; Lee, Hun Joo; Jung, Goo-Eun; Kim, Seung‐Il; Park, Jong-Myeon; Oh, Jung-Hun; Gurel, Ogan; Lee, Soo Suk; Lee, Jeong-Gun

doi:10.1002/smll.201370105

Cited by 4 publications

(8 citation statements)

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“…An SEM image and the extracted particle size distribution (4.7 ± 1.8 μm) of the produced EGaIn microdroplets are shown in Figure 2a,b, respectively. Notably, the produced particles had a relatively broader size distribution than those observed in our earlier studies, 20,38 where the EGaIn microdroplets produced in a similar manner were used as those produced in the colloidal state without washing and drying. Possibly, some of the EGaIn microdroplets used as dried fillers in the current study (to be subsequently weighed and redispersed in precursor epoxy suspensions) fused during centrifugal precipitation, transfer, and drying during sample preparation.…”

Section: Resultsmentioning

confidence: 67%

Effects of a liquid metal co‐filler on the properties of epoxy/binary filler composites

Kim,

Song,

Kim

et al. 2023

J of Applied Polymer Sci

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Liquid metals (LMs) with high fluidity and high thermal conductivity (TC) are receiving considerable attention in the research on thermal management polymer composites as alternatives to conventional rigid solid fillers or as co‐fillers to overcome the trade‐off between TC and composite processability at high filler loads. While most previous studies have investigated the effects of LM fillers in soft elastomeric matrices, their effects on the composite properties with rigid matrices, such as epoxy‐based polymers, have not been discussed extensively. Herein, we investigated the effects of LM eutectic Ga‐In (EGaIn) as a co‐filler on the properties of rigid epoxy‐based composites with a binary filler (Al2O3/EGaIn) system. The increase in the volume fraction of LM fillers significantly improves the processability of uncured precursor composites but markedly decreases the mechanical strength of the cured composites at their high loads—the latter effects have rarely been examined in previous studies. However, with adequate LM loads, the composites exhibited superior mechanical properties compared with the all‐solid‐filler system, withstanding a surprisingly high compressive load (~100 kN) under which the all‐solid‐filler system fractured. Furthermore, the epoxy/binary filler composites exhibited reasonably high TC values (~1 W/mK) comparable to that of commercial epoxy molding compounds, suggesting their potential applicability for electronic packaging.

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Section: Resultsmentioning

confidence: 67%

Effects of a liquid metal co‐filler on the properties of epoxy/binary filler composites

Kim,

Song,

Kim

et al. 2023

J of Applied Polymer Sci

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“…For example, a τ y value of 802.1 ± 253.6 Pa was obtained for the sample with Φ SiO2 = 0.0075 (Figure 4c), which is of the same order of magnitude as that of the LM‐in‐oil emulsion with polymeric liquid‐bridged LM microdroplets. [ 50 ] The τ y value systematically increased with a further increase in (Figure 4c), exceeding 10 4 Pa at Φ SiO2 ≥ 0.1, which is an unprecedented value for colloidal LM emulsions. The measurements often exceeded the instrumental limit at higher SiO 2 loadings (data not shown).…”

Section: Resultsmentioning

confidence: 93%

“…Despite the high Φ of the dispersed phase (Φ LM = 0.55), the resulting emulsion exhibited relatively high fluidity (Figure 1a), consistent with prior studies. [ 25,50 ] To the as‐prepared LM‐in‐oil emulsion, silica (SiO 2 , 224.8 ± 105.0 nm; see electron microscopic image in Figure S1 in the Supporting Information) nanospheres were added as rheology modifiers. For the systematic rheology study, Φ for the total dispersed phase was the same as that of the base emulsion, that is, Φ LM+MO = 0.55.…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, adding small amounts of liquid bridges with adequate wettability on the oxide skin of LM microdroplets can induce capillary attraction between the LM microdroplets and further enhance the rheological stiffness of LM emulsions (up to τ y values of a few thousand pascals), which may potentially enable novel manufacturing conditions. [ 50 ]…”

Section: Introductionmentioning

confidence: 99%

“…LM microdroplets, when suspended as discrete particles with a solid oxide skin in a liquid medium, increase the viscosity ( ɳ ) of the resulting colloidal systems in a loading‐dependent manner, and even induce elasticity at high loadings. [ 24,25,49,50 ] Such rheological properties of colloidal LM suspensions (or “emulsions,” considering the liquid nature of the dispersed phase) may be a key parameter for successfully harnessing the aforementioned functions with various form factors in emerging manufacturing technologies, such as multidimensional printing. [ 51,52 ] Neumann et al [ 25 ] attempted to load LM microdroplets into a liquid silicone medium up to a maximum concentration of 90 wt%, achieving a 3D‐printable colloidal LM emulsion with an estimated yield stress (τ y ) of ≈64 Pa. More concentrated LM emulsions could possess higher τ y values of a few hundred pascals.…”

Section: Introductionmentioning

confidence: 99%

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Vitrification of Liquid Metal‐in‐Oil Emulsions Using Nano‐Mineral Oxides

Ryu

Lee

Hong

et al. 2023

Adv Materials Inter

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wt% Sn), are referred to as "liquid metals (LMs)" [1] because of their low melting points (near or even below room temperature). These materials have low toxicity, in contrast with well-known LM Hg, while possessing both high electrical conductivity (as "metals") and high fluidity (as "liquids"). [2] These characteristics afford high potential in a wide variety of cutting-edge technologies. [3][4][5][6][7][8][9][10] Although unmodified LMs are promising for various applications, [3,11,12] modification can extend the application scope. [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] LMs can be tailored into the form of colloidal microdroplets, [17][18][19][20][21][22][23][24][25][26][27] which enables their dispersion in another carrier liquid or in solidifiable matrices. Despite their high interfacial tension, the dispersed LM microdroplets can remain as discrete particles (without immediate coalescence) owing to the solid oxide layer that spontaneously forms on the outermost particle surface, [2] unless this layer is intentionally destroyed. [24,[28][29][30] This oxide layer, known to be mostly Ga 2 O 3 , [2,31] enables shape transformation of the LM microdroplets, [19][20][21] surface functionalization, [32][33][34][35] adhesion to substrates, [2,36,37] and templated synthesis of other particulate matter. [10] Intuitively, an oxide passivation layer with an ultrawide bandgap (≈4.8 eV) [18] may seem undesirable in applications where electrical percolation via the core metal phase of the microdroplets is important; however, the surface oxide layer may be useful in certain classes of applications where fine tuning of the dielectric properties or electrical breakdown strength of the electronic devices embedding LMs is required. [38,39] Furthermore, the electronic properties of the oxide skin, in conjunction with the core metal phase, are prospectively key factors in the photothermal conversion and photocatalytic activity of LM microdroplets, [17,18,40,41] with significant implications in human health and environmental applications such as targeted therapeutics [9,23,[42][43][44] and pollutant removal. [45] Thus, the unique tunability of the electronic properties by employing external oxide materials [17,18,[46][47][48] calls for follow-up research on various combinations of LMs and other particulate additives.LM microdroplets, when suspended as discrete particles with a solid oxide skin in a liquid medium, increase the viscosity (ɳ) of the resulting colloidal systems in a loading-dependent manner, and even induce elasticity at high loadings. [24,25,49,50] Such rheological properties of colloidal LM suspensions (or Ga and Ga-based alloys have recently received significant attention as "liquid metals (LMs)" with the combined advantages of a low toxicity, low melting point, high fluidity, and high conductivity. An important method for modifying LMs for enhanced processabilities and new applications is to tailor them into colloidal microdroplets suspended in a liquid medium. In this study, the unique vitri...

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Current Status and Outlook of Low‐Melting‐Point Metals in Biomedical Applications

Mao,

Kim,

Seo

2023

Adv Funct Materials

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In recent years, low‐melting‐point metals including liquid metals, exhibiting outstanding physical and chemical properties such as excellent thermal and electrical conductivity, high surface tension, and biocompatibility, have garnered increasing attention from researchers. The melting point of such metals profoundly influences their properties and determines their range of applications, and comprehending the characteristics and properties of low‐melting‐point metals is crucial for their future applications. Although studies related to liquid metals are growing exponentially in particular, reports exploring the properties and applications of low‐melting‐point metals from the perspective of the melting point are still in their early stages. This review aims to comprehensively summarize the key properties and relevant applications of current low‐melting‐point metals described in recent studies, focusing on gallium‐ and bismuth‐based metal alloys. In addition, this review discusses the opportunities and challenges associated with low‐melting‐point metals, and it is anticipated that this review will contribute to the advancement of low‐melting‐point materials in the fields of flexible electronics and biomedicine, particularly for biomedical applications.

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Cancer Diagnostics: A Trachea‐Inspired Bifurcated Microfilter Capturing Viable Circulating Tumor Cells via Altered Biophysical Properties as Measured by Atomic Force Microscopy (Small 18/2013)

Cited by 4 publications

References 0 publications

Effects of a liquid metal co‐filler on the properties of epoxy/binary filler composites

Effects of a liquid metal co‐filler on the properties of epoxy/binary filler composites

Vitrification of Liquid Metal‐in‐Oil Emulsions Using Nano‐Mineral Oxides

Current Status and Outlook of Low‐Melting‐Point Metals in Biomedical Applications

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