Building pH Sensors into Paper-based Small-molecular Logic Sys-tems for Very Simple Detection of Edges of Objects

Jue Ling, Gaowa Naren, Jessica Kelly, Thomas S. Moody, A. Prasanna de Silva

Research output: Contribution to journalLetter

52 Citations (Scopus)
436 Downloads (Pure)

Abstract

Genetically-engineered bacteria and reactive DNA networks detect edges of objects, as done in our retinas and as also found within computer vision. We now demonstrate that simple molecular logic systems (a combination of a pH sensor, a photo acid generator and a pH buffer spread on paper) without any organization can achieve this relatively complex computational goal with good-fidelity. This causes a jump in the complexity achievable by molecular logic-based computation and extends its applicability. The molecular species involved in light dose-driven 'off-on-off' fluorescence is diverted in the ‘on’ state by proton diffusion from irradiated to unirradiated regions where it escapes a strong quencher, thus visualizing the edge of a mask.
Original languageEnglish
Pages (from-to)3763-3766
Number of pages4
JournalJournal of the American Chemical Society
Volume137
Issue number11
Early online date09 Mar 2015
DOIs
Publication statusPublished - 2015

Keywords

  • molecular computation

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