講演情報
[16a-K504-2]Adsorption Dynamics of Trisodium Citrate Dihydrate on NaCl Surface
〇(D)Voni Fulitasari1, Yuki Araki1, Toyoko Arai1 (1.Kanazawa Univ.)
キーワード：
FM-AFM、adsorption、NaCl
Additives are essential for controlling crystal morphology, which has significance in various applications. In this study, we investigated the adsorption behavior of trisodium citrate dihydrate on NaCl crystal surfaces using frequency modulation atomic force microscopy (FM-AFM) to understand additive-induced morphological changes.
Cleaved NaCl (100) surfaces were treated with pure water or additive solutions under dry conditions. Pure water-treated surfaces showed smooth steps and flat terraces, whereas surfaces exposed to the additive exhibited roughened steps and clusters along step edges and terraces, indicating additive adsorption. Additionally, NaCl crystals were immersed in a solution containing the additive. Holes were observed along step edges, expanding over time. These changes were not seen in additive-free conditions, confirming the additive’s effect.
Our findings demonstrate that trisodium citrate dihydrate significantly alters NaCl surface morphology by adsorbing onto steps and inducing localized dissolution. The adsorption dynamics and its impact on step morphology will be discussed in the presentation.
Cleaved NaCl (100) surfaces were treated with pure water or additive solutions under dry conditions. Pure water-treated surfaces showed smooth steps and flat terraces, whereas surfaces exposed to the additive exhibited roughened steps and clusters along step edges and terraces, indicating additive adsorption. Additionally, NaCl crystals were immersed in a solution containing the additive. Holes were observed along step edges, expanding over time. These changes were not seen in additive-free conditions, confirming the additive’s effect.
Our findings demonstrate that trisodium citrate dihydrate significantly alters NaCl surface morphology by adsorbing onto steps and inducing localized dissolution. The adsorption dynamics and its impact on step morphology will be discussed in the presentation.