4.8 Article

Increased Transfer Efficiency from Molecular Photonic Wires on Solid Substrates and Cryogenic Conditions

期刊

JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 9, 期 13, 页码 3654-3659

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.8b00931

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  1. NISE initiative
  2. NRL Nanosciences Institute
  3. LUCI project through the OSD
  4. George Mason University Presidential Scholar Fellowship Program

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Molecular photonic wires (MPWs) are tunable nanophotonic structures capable of capturing and directing light with high transfer efficiencies. DNA-based assembly techniques provide a simple and economical preparation method for MPWs that allows precise positioning of the molecular transfer components. Unfortunately, the longest DNA-based MPWs (similar to 30 nm) report only modest transfer efficiencies of similar to 2% and have not been demonstrated on solid-state platforms. Here, we demonstrate that DNA based MPWs can be spin-coated in a polymer matrix onto silicon wafers and exhibit a 5-fold increase in photonic transfer efficiency over solution-phase MPWs. Cooling these MPWs to 5 K led to further efficiency increases ranging from similar to 40 to 240% depending on the length of the MPW. The improvement of MPW energy transport efficiencies advances prospects for their incorporation in a variety of optoelectronics technologies and makes them an ideal test bed for further exploration of nanoscale energy transfer.

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