Bulk rheology of sticky DNA-functionalized emulsions.
Bulk rheology of sticky DNA-functionalized emulsions.
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DOI：
10.1103/physreve.104.054602
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发表时间：
2021-11
期刊：
影响因子：
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通讯作者：
I. Stoev;A. Caciagli;Anasua Mukhopadhyay;C. Ness;E. Eiser
中科院分区：
文献类型：
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作者：
I. Stoev;A. Caciagli;Anasua Mukhopadhyay;C. Ness;E. Eiser
我们通过实验和基于粒子的模拟测量浓缩的非布朗液滴乳液的流变学，该乳液用表面结合的单链（SS）“粘性”DNA官能化。在不存在ssDNA的情况下，乳液粘度随着分散相体积分数的增加而增加，然后在与随机紧密堆积相关的临界温度下通过液-固转变。引入ssDNA导致液-固转变，在ε_{c}= 0.64）显示功能化的弱效应，而弹性流变学由液滴刚度支配;（ii）具有ε_{c}= 3的悬浮液，功能化导致可控的粘弹性转变。我们目前的状态图显示的范围内的流变调谐可通过这些手段。
We measure by experiment and particle-based simulation the rheology of concentrated, non-Brownian droplet emulsions functionalized with surface-bound single-stranded (ss), "sticky," DNA. In the absence of ssDNA, the emulsion viscosity increases with the dispersed phase volume fraction ϕ, before passing through a liquid-solid transition at a critical ϕ_{c} related to random close packing. Introducing ssDNA leads to a liquid-solid transition at ϕϕ_{c}≈0.64) show weak effects of functionalization, with elastic rheology instead governed by droplet stiffness; (ii) suspensions with ϕ3, functionalization leads to a controllable viscous-elastic transition. We present state diagrams showing the range of rheological tuning attainable by these means.