期刊
ACS APPLIED MATERIALS & INTERFACES
卷 6, 期 6, 页码 3771-3778出版社
AMER CHEMICAL SOC
DOI: 10.1021/am404659f
关键词
Forster resonance energy transfer (FRET); biocomputing; molecular logic; quantum dot; terbium; lanthanide
资金
- NRL NSI
- ONR
- DTRA-JSTO MIPR [B112582M]
We combine quantum dots (QDs) with long-lifetime terbium complexes (Tb), a near-IR Alexa Fluor dye (A647), and self-assembling peptides to demonstrate combinatorial and sequential bionanophotonic logic devices that function by time-gated Forster resonance energy transfer (FRET). Upon excitation, the Tb-QD-A647 FRET-complex produces time-dependent photoluminescent signatures from multi-FRET pathways enabled by the capacitor-like behavior of the Tb. The unique photoluminescent signatures are manipulated by ratiometrically varying dye/Tb inputs and collection time. Fluorescent output is converted into Boolean logic states to create complex arithmetic circuits including the half-adder/half-subtractor, 2:1 multiplexer/1:2 demultiplexer, and a 3-digit, 16-combination keypad lock.
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