{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,26]],"date-time":"2026-08-26T16:33:47Z","timestamp":1787762027333,"version":"build-2784847793"},"reference-count":65,"publisher":"Wiley","issue":"16","license":[{"start":{"date-parts":[[2026,8,25]],"date-time":"2026-08-25T00:00:00Z","timestamp":1787616000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2026,8,25]],"date-time":"2026-08-25T00:00:00Z","timestamp":1787616000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["chemistry-europe.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["ChemPhysChem"],"published-print":{"date-parts":[[2026,8,27]]},"abstract":"<jats:p>Reverse micelles (RMs) have emerged as versatile soft templates for engineering anisotropic nanostructures. However, insights into how cosurfactant\u2010mediated interfacial flexibility governs morphology remain limited, even though this parameter is critical for the rational design of anisotropic nanomaterials. In this study, we examine how cosurfactant\u2010mediated interfacial dynamics in cetyltrimethylammonium bromide (CTAB)\u2010based RMs direct the growth of copper oxalate (CuOx) nanostructures. By employing two distinct cosurfactants\u20141\u2010butanol and 1\u2010octanol\u2014we demonstrate a morphology switch from nanorods to nanocubes, respectively. Using the solvatochromic probe Coumarin 343 (C343), we probe solvation dynamics to assess interfacial environments of RMs. The observed biexponential solvation behavior indicates heterogeneous water populations and interfacial perturbations during nanostructure formation. RMs containing 1\u2010octanol exhibit significantly retarded water reorientation, indicating a more rigid interface compared to those with 1\u2010butanol, likely due to stronger interactions between the longer alkyl chain of octanol and the CTAB tails. These interfacial differences correlate with the formation of cube\u2010shaped and rod\u2010shaped nanostructures, respectively. Complementary in situ NMR spectroscopy reveals distinct water microenvironments in butanol\u2010 and octanol\u2010based RM systems, aligning with the morphological anisotropy observed. Small\u2010angle neutron scattering (SANS) further confirms cosurfactant\u2010induced changes in the micellar size and packing. Collectively, these findings highlight the pivotal role of cosurfactant\u2010mediated interfacial flexibility in governing the formation of anisotropic nanostructures and provide comprehensive insights for controlling morphology in soft template systems.<\/jats:p>","DOI":"10.1002\/cphc.70542","type":"journal-article","created":{"date-parts":[[2026,8,26]],"date-time":"2026-08-26T02:25:35Z","timestamp":1787711135000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Cosurfactant\u2010Mediated Interfacial Flexibility: A Key to Controlling the Morphology of Anisotropic Nanostructures in Cetyltrimethylammonium Bromide Reverse Micelles"],"prefix":"10.1002","volume":"27","author":[{"given":"Nitin","family":"Yadav","sequence":"first","affiliation":[{"name":"Department of Chemical Sciences Indian Institute of Science Education and Research  Berhampur Odisha 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