DNA连接的金纳米颗粒组装体中的无序
Disorder in DNA-Linked Gold Nanoparticle Assemblies
摘要：
我们报告的DNA连接的纳米粒子组装体的相行为的无序的影响的实验观察。DNA接头长度的变化导致DNA连接的纳米颗粒组装体的不同解链温度。我们观察到一个不寻常的趋势，非单调的“标签”模式的解链温度作为一个功能的DNA连接长度。导致不相等的DNA双链体长度的接头DNA引入无序并降低纳米颗粒系统的解链温度。与游离DNA热力学的比较表明，这种异常的锯齿形模式不存在游离DNA双链体的熔化，这表明，由不相等的DNA双链体长度引入的无序导致这种不寻常的DNA连接的纳米颗粒组装体的集体行为。
英文摘要：
We report experimental observations on the effect of disorder on the phase behavior of DNA-linked nanoparticle assemblies. Variation in DNA linker lengths results in different melting temperatures of the DNA-linked nanoparticle assemblies. We observed an unusual trend of a non-monotonic ``zigzag'' pattern in the melting temperature as a function of DNAlinker length. Linker DNA resulting in unequal DNA duplex lengths introduces disorder and lowers the melting temperature of the nanoparticle system. Comparison with free DNA thermodynamics shows that such an anomalous zigzag pattern does not exist for free DNA duplex melting, which suggests that the disorder introduced by unequal DNA duplex lengths results in this unusual collective behavior of DNA-linked nanoparticle assemblies.
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