Secondary Particle Formation during the Nonaqueous Synthesis of Metal Oxide Nanocrystals

Stolzenburg, Pierre; Hämisch, Benjamin; Richter, Steffen; Huber, Klaus; Garnweitner, Georg

doi:10.1021/acs.langmuir.8b00020

Cited by 8 publications

(9 citation statements)

References 69 publications

(103 reference statements)

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“…Stolzenburg et al [43] studied the secondary particle formation processes during the nonaqueous synthesis of ZrO 2 and TiO 2 nanoparticles and described mechanisms driving aggregation and agglomeration ( Figure 1). They found that densely packed aggregates composed of primary nanoparticles were formed at the beginning, and next agglomerated to so-called 'superstructures'.…”

Section: The Aggregation and Agglomeration Of Nanoparticles Dispersedmentioning

confidence: 99%

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The Effect of Addition of Nanoparticles, Especially ZrO2-Based, on Tribological Behavior of Lubricants

Rylski

Siczek

2020

Lubricants

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The aim of the paper was to discuss different effects, such as, among others, agglomeration of selected nanoparticles, particularly those from zirconia, on the tribological behavior of lubricants. The explanation of the difference between the concepts of ‘aggregation’ and ‘agglomeration’ for ZrO2 nanoparticles is included. The factors that influence such an agglomeration are considered. Classification and thickeners of grease, the role of additives therein, and characteristics of the lithium grease with and without ZrO2 additive are discussed in the paper. The role of nanoparticles, including those from ZrO2 utilized as additives to lubricants, particularly to the lithium grease, is also discussed. The methods of preparation of ZrO2 nanoparticles are described in the paper. The agglomeration of ZrO2 nanoparticles and methods to prevent it and the lubrication mechanism of the lithium nanogrease and its tribological evaluation are also discussed. Sample preparation and a ball-on disc tester for investigating of spinning friction are described. The effect of ZrO2 nanoparticles agglomeration on the frictional properties of the lithium grease is shown. The addition of 1 wt.% ZrO2 nanoparticles to pure lithium grease can decrease the friction coefficient to 50%. On the other hand, the agglomeration of ZrO2 nanoparticles in the lithium grease can increase twice the friction coefficient relative to that for the pure grease.

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Section: The Aggregation and Agglomeration Of Nanoparticles Dispersedmentioning

confidence: 99%

“…Particle formation mechanisms during the nonaqueous synthesis with an emphasis on the aggregation and agglomeration processes[43].Reprinted with permission from (Stolzenburg, P.; Hämisch, B.; Richter, S.; Huber, K.; Garnweitner, G. Secondary Particle Formation during the Nonaqueous Synthesis of Metal Oxide Nanocrystals. Langmuir 2018, vol.…”

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confidence: 99%

The Effect of Addition of Nanoparticles, Especially ZrO2-Based, on Tribological Behavior of Lubricants

Rylski

Siczek

2020

Lubricants

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“…It was shown that the activation energy for densification of ZrO 2 nanoceramics is 50% less than that of submicron ZrO 2 [64]. Stolzenburg et al [65], using a solvothermal synthesis method, observed ZrO 2 nanoparticles agglomerates of size around 200 nm and justified their results by a probable instantaneous self-arrangement of nanoparticles after nucleating in the tetragonal phase. In the present study, the respective values were 243.9 nm, 188.96 nm and 364.00 nm, following heating at 800, 1000 and 1200 • C, respectively.…”

Section: Discussionmentioning

confidence: 99%

Sol–Gel Synthesis and Characterization of YSZ Nanofillers for Dental Cements at Different Temperatures

et al. 2021

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Background: Yttria-stabilized zirconia nanoparticles can be applied as fillers to improve the mechanical and antibacterial properties of luting cement. The aim of this study was to synthesize yttria-stabilized zirconia nanoparticles by the sol–gel method and to investigate their composition, structure, morphology and biological properties. Methods: Nanopowders of ZrO2 7 wt% Y2O3 (nY-ZrO) were synthesized by the sol–gel method and were sintered at three different temperatures: 800, 1000 and 1200 °C, and their composition, size and morphology were investigated. The biocompatibility was investigated with human gingival fibroblasts (hGFs), while reactive oxygen species (ROS) production was evaluated through fluorescence analysis. Results: All synthesized materials were composed of tetragonal zirconia, while nanopowders sintered at 800 °C and 1000 °C additionally contained 5 and 20 wt% of the cubic phase. By increasing the calcination temperature, the crystalline size of the nanoparticles increased from 12.1 nm for nY-ZrO800 to 47.2 nm for nY-ZrO1200. Nano-sized particles with good dispersion and low agglomeration were received. Cell culture studies with human gingival fibroblasts verified the nanopowders’ biocompatibility and their ROS scavenging activity. Conclusions: the obtained sol–gel derived nanopowders showed suitable properties to be potentially used as nanofillers for dental luting cement.

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“…Ostwald Ripening is a phenomenon that is observed in solid solutions or liquid soles and explains changes in the structure of inhomogeneity with time, for example, small crystals or sol particles dissolving and being deposited back into crystals or larger sol particles. This phenomenon was first described by Wilhelm Ostwald in 1896 [15,16] and is commonly found in oil-in-water [17] emulsions [27].…”

Section: Ostwald Ripeningmentioning

confidence: 92%

“…Figure 5.An example of a particle formation mechanism based on the Smoluchowski process with an emphasis on agglomeration and aggregation[27].…”

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confidence: 99%

Preparation of Hollow Nanostructures via Various Methods and Their Applications

Situmeang¹

2021

Novel Nanomaterials

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The hollow nanomaterial is a unique material to be developed because of its characteristics, especially the surface area where it has more surfaces than other materials. In general, hollow nanomaterials could be synthesized using hard-templated, soft-templated, self-templated, template-free and simple methods. In this chance, the catalyst preparation focused on using a simple method to study its activity on the dyes photodegradation reaction, deNOx reaction, carbon dioxides utilization, and photoconversion of chemical compounds. The characterization is emphasized on Scanning electron and Transmission electron Microscopes were used to identify its structure and characteristics. Furthermore, the analysis of UV-Vis spectrophotometer and HPLC is done to point out its activity on the photodegradation of dyes, deNOx reaction, and photoconversion of cellulose and carbon dioxides utilization.

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Secondary Particle Formation during the Nonaqueous Synthesis of Metal Oxide Nanocrystals

Cited by 8 publications

References 69 publications

The Effect of Addition of Nanoparticles, Especially ZrO2-Based, on Tribological Behavior of Lubricants

The Effect of Addition of Nanoparticles, Especially ZrO2-Based, on Tribological Behavior of Lubricants

Sol–Gel Synthesis and Characterization of YSZ Nanofillers for Dental Cements at Different Temperatures

Preparation of Hollow Nanostructures via Various Methods and Their Applications

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