Optimization of digital image processing to determine quantum dots’ height and density from atomic force microscopy

Panning ideal In(Ga)As(P)/InGaP quantum dot structures for intermediate band solar cells

“…In an attempt to obtain the desired small QDs, four different uncapped single layer InAs QDs samples were grown with different deposition times on InGaP, and their size and density were determined by AFM. Figure 4(a) shows the AFM image of the QDs deposited for 2.4 s, corresponding to 1.32 MLs thickness, while figure 4(b) depicts its histogram, built using a specially designed methodology for digital processing of AFM images [15], from which the density, radius, diameter and volume of the QDs are extracted. For the calculation of the volume, lens-shaped nanostructures are assumed, based on the transmission electron microscopy images.…”

“…The QDs at the surface were analyzed using a Veeco MultiMode V Atomic Force Microscope with a tip driven at frequencies above 100 kHz in non-contact mode over 9 µm 2 . The images obtained were processed with an in-house developed software [15] to determine the QD's density, height and diameter.…”

Grain Analysis of Atomic Force Microscopy Images via Topological Data Analysis

“…The conventional methods, such as the threshold and watershed algorithms embedded to the softwares (e.g. WSxM [6] and Gwyddion [9]), might not be accurate and robust enough for grains and nanoparticles studies [13]. Threshold algorithms requires setting a global height threshold to isolate particles on a welllevelled background.…”

Micro usina fotovoltaica comercial Miramontes: Expansão alterações e análise do desempenho

“…Ha uma discussa o na literatura acerca de qual distribuiça o e a mais apropriada, se a gaussiana ou a log-normal. Em certos casos, a log-normal parece ser a mais apropriada(Ruiz, 2017).…”