Three‐Dimensionally Oriented Aggregation of a Few Hundred Nanoparticles into Monocrystalline Architectures

Abstract

Three‐dimensional nanoarchitectures (see Figure) are formed by the oriented aggregation of CuO nanoparticles. One‐dimensional orientation in the early stages of aggregation (in the [001] plane) of CuO nanoparticles is followed by formation of single‐crystalline nanostructures consisting of hundreds of oriented nanoparticles.

Reagent control over the composition of mixed metal oxide nanoparticles

“…The TEM images show that in addition to the changing size, the shape is a factor over 60% Cu. As seen in Figure 11(a), at high Fe content the typical NPs are faceted; however, at high Cu composition the morphology is that of aggregates (Figure 11(b)) similar to the single-crystalline three-dimensional aggregates previously reported by Zhang et al [24]. The size and size distribution as measured by the TEM for sample 19 (7 AE 3 nm) are within the range measured by SAXS (6.8 AE 2.5 nm).…”

Biomimetic and Aggregation-Driven Crystallization Route for Room-Temperature Material Synthesis: Growth of β-Ga2O3 Nanoparticles on Peptide Assemblies as Nanoreactors

“…To obtain a better understanding of the particlefusion mechanism, the SAED patterns of nanoparticles at different growth stages were compared. The SAED of fusing nanoparticles in the three-week old sample (Figure 2-f) shows the fainted and fused (100) and (001) 23 The SAED of the fused nanoparticles in the four-week old sample (Figure 2-a) shows the strong intensities of the (100) and the (001) spots with the single crystalline structure. These SAED patterns indicate that the nanoparticles in Figure 2-f were aggregated along the [010] direction to grow single-crystalline β-Ga 2 O 3 particles shown in Figure 2-a.…”

Efficient catalytic effect of CuO nanostructures on the degradation of organic dyes

“…Interestingly petals are composed of nanowires (NWs) and these NWs are assembling through oriented attachment to form nanocrystals. According to the oriented attachment growth model of NSs, we expect that the CuO petals NSs were formed by NWs aggregation [24,25]. …”