Base dependent DNA-carbon nanotube interactions: activation enthalpies and assembly-disassembly control.

Base dependent DNA-carbon nanotube interactions: activation enthalpies and assembly-disassembly control.
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DOI:
10.1088/0957-4484/20/39/395101
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发表时间:
2009-09-30
期刊:
影响因子:
3.5
通讯作者:
Branton D
Branton D
中科院分区:
材料科学3区
文献类型:
--
作者:
Albertorio F;Hughes ME;Golovchenko JA;Branton D

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我们量化了溶液中单链DNA和单壁碳纳米管(SWNT)之间的碱基依赖性相互作用。DNA/单壁碳纳米管杂化物具有广泛的应用前景,从纳米级电子学和纳米管基材料的组装,到药物输送和DNA测序。这些应用需要控制混合动力的组装和拆卸。我们的分析实验揭示了单壁碳纳米管与核碱基结合强度的顺序为G > C > A > T。此外,依赖于时间的固定温度的实验,探测解离过程的动力学提供的值的平衡常数和解离的微观相互作用的基础。量化混合动力稳定性的基础依赖性显示了如何洞察组件相互作用的能量学有助于控制混合动力组装和拆卸。
We quantify the base dependent interactions between single stranded DNA and single walled carbon nanotubes (SWNT) in solution. DNA/SWNT hybrids hold the promise of applications ranging from nanoscale electronics and assembly of nanotube based materials, to drug delivery and DNA sequencing. These applications require control over the hybrid assembly and disassembly. Our analytical assay reveals the order of nucleobase binding strengths with SWNTs as G > C > A > T. Furthermore, time dependent fixed temperature experiments that probe the kinetics of the dissociation process provide values for the equilibrium constants and dissociation enthalpies that underlie the microscopic interactions. Quantifying the base dependency of hybrid stability shows how insight into the energetics of the component interactions facilitates control over hybrid assembly and disassembly.
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