ArticleThe journal of physical chemistry letters2026
Modulation of Two-Photon Absorption Due to the Reversible Change in the Oxidation State of Atomically Precise Gold Nanoclusters.
Article in The journal of physical chemistry letters, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The atomically precise nanoclusters offer precise control of optical properties on the nanoscale, as long as we understand the relation among the size, composition, and structure of nanoclusters and their physical properties. So far, the primary interest has been in the synthesis of nanoclusters with controlled optical properties, in not only the one-photon but also the two-photon regime. Large two-photon absorption cross sections of nanoclusters were reported, but the possibility of modulation of nonlinear optical (NLO) properties by external stimuli has been scarcely explored. We present here the experimental data supported by DFT calculations on two-photon absorption of gold nanoclusters, which are modified by oxidation-reduction processes. Such reactions can be an important regulator of the nonlinear optical properties of various materials, which is well established, e.g., for organometallics, but has not been demonstrated for nanoclusters. The reversible oxidation of [Au
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