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In assemblages such as biofilms, spatial variations in pH, oxygen (O2), and reactive species create diverse microenvironments. This chemical landscape drives physiological heterogeneity, metabolic stratification, and profound tolerance to antimicrobial agents. Despite their recognized importance, recreating these dynamic microenvironments in vitro has been a persistent challenge. This perspective highlights electrochemistry as a transformative solution, offering unparalleled spatiotemporal control to sculpt the microbial microenvironment. By applying programmable potentials to microelectrodes, key chemical species can be generated or depleted on demand, creating noninvasive and dynamic chemical landscapes. We review recent advances in this field, detailing the principles and applications for electrochemically generating gradients of pH, O2, reactive species of nitric oxide (NO), and reactive oxygen species (ROS). By empowering researchers to move beyond static snapshots and dissect the real-time kinetics of microbial responses, electrochemical gradient generation opens a new frontier for understanding and manipulating the microbial world.<\/jats:p>","DOI":"10.1021\/jacs.5c21704","type":"journal-article","created":{"date-parts":[[2026,2,4]],"date-time":"2026-02-04T05:21:46Z","timestamp":1770182506000},"page":"5837-5851","source":"Crossref","is-referenced-by-count":5,"title":["Sculpting Microbial\nMicroenvironments: Spatiotemporal\nControl via Programmable Electrochemical Gradients"],"prefix":"10.1021","volume":"148","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6530-2929","authenticated-orcid":true,"given":"Haiyuan","family":"Zou","sequence":"first","affiliation":[{"name":"University of California Los Angeles , , , ,","place":["Los Angeles, California, United States, 90095"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4821-795X","authenticated-orcid":true,"given":"Yifan","family":"Gao","sequence":"additional","affiliation":[{"name":"Stanford University School of Medicine , , , ,","place":["Stanford, California, United States, 94305"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0007-6827-9318","authenticated-orcid":true,"given":"Ziqi","family":"Ding","sequence":"additional","affiliation":[{"name":"University of California Los Angeles , , , ,","place":["Los Angeles, California, United States, 90095"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5546-3852","authenticated-orcid":true,"given":"Chong","family":"Liu","sequence":"additional","affiliation":[{"name":"University of California Los Angeles , , , ,","place":["Los Angeles, California, United States, 90095"]},{"name":"University of California Los Angeles , , , ,","place":["Los Angeles, California, United States, 90095"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"316","published-online":{"date-parts":[[2026,2,4]]},"reference":[{"issue":"10","key":"2026090713180594900_cit1","doi-asserted-by":"publisher","first-page":"593","DOI":"10.1038\/s41579-022-00692-2","article-title":"Gradients and Consequences of Heterogeneity\nin Biofilms","volume":"20","author":"Jo","year":"2022","journal-title":"Nat. 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