Fig. 2: Morphological properties and optical response of CuDNPs.
From: Towards transparent and durable copper-containing antimicrobial surfaces
SEM images (a) clearly illustrate the influence of the annealing temperature on the particle shape and size. High temperature produces separate, rounded particles with a contact angle \(\approx\)90°, whilst low temperature produces, flatter particles, with a contact angle \( < \) 90° and that are sometimes in contact. Scale bar = 100 nm. Optical spectra obtained from experiment (b) and modeling (c). Modeling qualitatively reproduces the experiments, in particular the red shift and broadening of the plasmonic resonance due to a reduction of particle’s contact angle. Insets of (b) show the color of the coatings against white background and also against a colored text background to show transparency and color neutrality of the TANCS. The size of the samples is 2 x 2 in.2. The insets of (c) show the particle shape used for the modeling as determined from the SEM images in a.
