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- W4310447752 abstract "Uniform 2D arrays of metal nanoparticles (NPs) have received significant attention in the field of molecular sensing using localized surface plasmon resonance. Generally, metal NPs bear organic surface-modifying molecules to prevent aggregation and form 2D metal NP arrays. However, surface-modifying molecules negatively affect molecular sensing. Previously, we developed a technique for forming a 2D bare metal NP array, denoted the sandwich (SW) technique. However, the formation mechanism of these 2D metal NP arrays remains unknown and therefore the experimental conditions of the SW technique are not optimized. Here, we observed the formation of a 2D Au NP (d: 60 nm) array using the SW technique with an optical microscope. Moderate drying conditions of the colloidal droplets sandwiched between two parallel substrates were necessary for forming 2D Au NP arrays. We then optimized the drying conditions and obtained a 2D Au NP array. This array was uniform, and the Au NPs were arranged at distances of 4.5 nm with hexagonal periodicity, without aggregation. Further, the 2D Au NP arrays exhibited excellent spot-to-spot reproducibility in surface-enhanced Raman scattering." @default.
- W4310447752 created "2022-12-10" @default.
- W4310447752 creator A5046614042 @default.
- W4310447752 creator A5089256117 @default.
- W4310447752 date "2022-11-30" @default.
- W4310447752 modified "2023-10-18" @default.
- W4310447752 title "Formation and Characterization of 2D Closely Packed Arrays of Bare Gold Nanoparticles without Aggregation" @default.
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- W4310447752 doi "https://doi.org/10.1021/acsomega.2c04032" @default.
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