Cyclic Voltarefractometry of Single TiO₂ Nanoparticles in Large Ensembles in Nonaqueous Electrolyte.

ABSTRACT: Single nanoparticle (NP) cyclic voltarefractometry (CVR), realized as wide-field surface plasmon resonance microscopy (SPRM) in combination with potential cycling, has been proposed and applied to the in situ study of TiO₂ NPs. Electrochemical activity of TiO₂ is mainly observed outside the electrochemical stability window of water. Therefore, the response of individual anatase (a-TiO₂) and rutile (r-TiO₂) NPs adsorbed on a gold layer was studied in 0.25 M LiClO₄ acetonitrile solutions. The use of acetonitrile allows us to exploit a much wider potential window compared to water, while due to the almost identical refractive index (n_D = 1.344 and 1.333 for acetonitrile and water, respectively), the conditions of the SPR

SUBMITTER: Laurinavichyute VK 

PROVIDER: S-EPMC11755399 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature