pH oscillating system for molecular computation as a chemical turing machine

Draper, Thomas C.; Poros-Tarcali, Eszter; P�rez-Mercader, Juan

Abstract

It has previously been demonstrated that native chemical Turing machines can be constructed by exploiting the nonlinear dynamics of the homogeneous oscillating Belousov-Zhabotinsky reaction. These Turing machines can perform word recognition of a Chomsky type 1 context sensitive language (CSL), demonstrating their high computing power. Here, we report on a chemical Turing machine that has been developed using the H2O2-H2SO4-SO32--CO32- pH oscillating system. pH oscillators are different to bromate oscillators in two key ways: the proton is the autocatalytic agent, and at least one of the reductants is always fully consumed in each turnover─meaning the system has to be operated as a flow reactor. Through careful design, we establish a system that can also perform Chomsky type 1 CSL word recognition and demonstrate its power through the testing of a series of in-language and out-of-language words.

• Journal Article Type: Article
• Acceptance Date: Jan 21, 2022
• Online Publication Date: Feb 4, 2022
• Publication Date: Feb 22, 2022
• Deposit Date: Apr 7, 2022
• Publicly Available Date: Apr 8, 2022
• Journal: ACS Omega
• Electronic ISSN: 2470-1343
• Publisher: American Chemical Society
• Peer Reviewed: Peer Reviewed
• Volume: 7
• Issue: 7
• Pages: 6099-6103
• DOI: https://doi.org/10.1021/acsomega.1c06505
• Keywords: General Chemical Engineering; General Chemistry; unconventional computing; molecular computing
• Public URL: https://uwe-repository.worktribe.com/output/9303872