scholarly journals Thermokinetic Study on Growth Process of MnMoO4 Nanocrystals on Double Microemulsion System by In Situ Microcalorimetry

2017 ◽  
Vol 07 (06) ◽  
pp. 551-559
Author(s):  
江源 邱
Keyword(s):  
Growth Process ◽  
Microemulsion System ◽  
In Situ Microcalorimetry

Thermokinetic study on growth process of CdS nanocrystals by in situ microcalorimetry

2011 ◽  
Vol 65 (12) ◽  
pp. 1768-1771 ◽  
Author(s):  
Jie Chen ◽  
Yujie Ma ◽  
Gaochao Fan ◽  
Yanfen Li ◽  
Junying Jiang ◽  
...  
Keyword(s):  
Growth Process ◽  
Cds Nanocrystals ◽  
In Situ Microcalorimetry

Preparation of Straight and Orderly Polypyrrole Microrods through Soft Template Methods

2011 ◽  
Vol 306-307 ◽  
pp. 679-683
Author(s):  
Li Bo Sun ◽  
Yuan Chang Shi ◽  
Lin Ya Chu ◽  
Bing Chang Zhang ◽  
Jiu Rong Liu
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Cetyltrimethylammonium Bromide ◽  
Growth Process ◽  
Room Temperature ◽  
Oxidative Polymerization ◽  
Soft Template ◽  
Microemulsion System ◽  
Transmission Electron ◽  
The Impact

The straight and orderly microrods of polypyrrole(PPy) was synthesized in a microemulsion system consisted of cetyltrimethylammonium bromide(CTAB), n-pentanol, water and pyrrole by chemical oxidative polymerization, in which CTAB was used as soft templates and APS was used as the oxidant. Fourier-transform infrared spectroscopy (FTIR) was used to characterize the structure of the PPy microrods. Transmission electron microscopy (TEM) and high resolution transmission electron microscopy (HRTEM) was used to characterize the morphology of the samples. We discussed the impact of temperature, the adding way of the oxidant, the amount of cosurfactant n-pentanol to the morphology of PPy microrods. The results showed that straight and orderly PPy microrods with a diameter about 300nm and a length up to 20μm were synthesized when the temperature was kept at room temperature (25°C), the dropping time of APS was more than 1.5h, the ratio of CTAB to n-pentanol was 0.6:1, and the polymerization time was about 24h. We studied the growth process of PPy microrods by HTEM analysis. HTEM images revealed that the growth process of PPy changed from hollow microrods, semi-hollow microrods, and finally solid microrods.

scholarly journals In situ XPS analysis of the atomic layer deposition of aluminium oxide on titanium dioxide

2019 ◽  
Vol 21 (3) ◽  
pp. 1393-1398 ◽  
Author(s):  
Robert H. Temperton ◽  
Andrew Gibson ◽  
James N. O'Shea
Keyword(s):  
Titanium Dioxide ◽  
Atomic Layer Deposition ◽  
Growth Process ◽  
Aluminium Oxide ◽  
Atomic Layer ◽  
Xps Analysis ◽  
Layer Deposition ◽  
Titanium Dioxide Surface ◽  
Rutile Titanium Dioxide

Ultra-thin aluminium oxide was grown on a rutile titanium dioxide surface by atomic layer deposition using trimethylaluminium and water precursors. XPS measurements were made during the growth process at near-ambient pressures.

In Situ Growth of Superhydrophobic Films on Aluminum Substrate

2012 ◽  
Vol 557-559 ◽  
pp. 1679-1682
Author(s):  
Jin Liang ◽  
Hong Chen ◽  
You Hua Fan ◽  
Zhi Qing Yuan
Keyword(s):  
Growth Process ◽  
Precipitation Method ◽  
Sliding Angle ◽  
Sem Image ◽  
Low Surface Energy ◽  
Homogeneous Precipitation Method ◽  
Porous Architecture ◽  
Novel Method ◽  
Highly Porous

A facile and novel method was developed to fabricate highly porous CeO2 surface on aluminum via a combination of homogeneous precipitation method and in situ growth process. After the introduction of CeO2 film, aluminum exhibited excellent superhydrophobicity with contact angle of 152.9±1.5 o and a sliding angle of 5 o. SEM image of the film showed that the resulting surface exhibits a hierarchical micro-Superscript text and nanostructure, which comprised of nanoleaves that grew perpendicular to the substrate and interleaved together to form a highly porous structure. This porous architecture, along with the low surface energy renders the aluminum superhydrophobicity.

scholarly journals In-situ HRTEM observations of growth process of decagonal quasicrystals

2014 ◽  
Vol 70 (a1) ◽  
pp. C97-C97
Author(s):  
Keisuke Nagao ◽  
Kazue Nishimoto ◽  
Tomoaki Inuduka ◽  
Keiichi Edagawa
Keyword(s):  
Growth Mechanism ◽  
Growth Process ◽  
Structural Information ◽  
Growth Models ◽  
Experimental Studies ◽  
Unit Cell ◽  
Small Scale ◽  
Growth Processes ◽  
Decagonal Quasicrystals

Quasicrystals possess quasiperiodicity, where the structure cannot be described simply by the repetition of unit cell like conventional crystals. This fact raises the question of how quasicrystals grow, i.e., what physical mechanism makes the growth of quasicrystals possible. While crystals can grow by copying a unit cell via local atomic interactions, nonlocal structural information seems to be required in the growth of quasicrystals. This problem has attracted much attention ever since the first discovery of a quasicrystal in 1984, and several theoretical growth models [1] have been proposed. However, no experimental studies have so far been reported, and it is still unclear whether these theoretical growth models apply to real quasicrystals. In the present study, we have conducted in-situ high-temperature electron microscopic (HRTEM: High-Resolution Transmission Electron Microscopy) observations of the growth process of decagonal quasicrystals to elucidate the growth mechanism. The growth processes of a decagonal quasicrystal of Al70.8Ni19.7Co9.5were observed by HRTEM in the temperature range 1073-1173K. Tiling patterns with edge length of about 2nm were constructed from a series of HRTEM images. They were analysed in the framework of the projection method. Here, we followed the procedures in our previous work [2]. We have already reported the results of some observations and analyses elsewhere [3]. However, the growth processes of them were on a small scale, and the results were indefinite. Recently, we have succeeded in observing a growth process on a massive scale. In this paper, we present the results of this observation and subsequent analyses, and discuss the growth mechanism of the quasicrystal.

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