scholarly journals Role of boric acid in nickel nanotube electrodeposition: a surface-directed growth mechanism

2014 ◽  
Vol 50 (5) ◽  
pp. 527-529 ◽  
Author(s):  
Lauren M. Graham ◽  
Seungil Cho ◽  
Sung Kyoung Kim ◽  
Malachi Noked ◽  
Sang Bok Lee
Keyword(s):  
Boric Acid ◽  
Growth Mechanism ◽  
Directed Growth

Chemical Availability of Bromide Dictates CsPbBr3 Nanocrystal Growth

2019 ◽  
Author(s):  
Je-Ruei Wen ◽  
Benjamin Roman ◽  
Freddy Rodriguez Ortiz ◽  
Noel Mireles Villegas ◽  
Nicholas Porcellino ◽  
...  
Keyword(s):  
Reaction Time ◽  
Growth Mechanism ◽  
Chemical Control ◽  
Critical Role ◽  
Phase Evolution ◽  
Detailed Understanding ◽  
Semiconductor Nanocrystal ◽  
Nanocrystal Growth ◽  
Chemical Availability

Lack of detailed understanding of the growth mechanism of CsPbBr3 nanocrystals has hindered sophisticated morphological and chemical control of this important emerging optoelectronic material. Here, we have elucidated the growth mechanism by slowing the reaction kinetics. When 1-bromohexane is used as an alternative halide source, bromide is slowly released into the reaction mixture, extending the reaction time from ~3 seconds to greater than 20 minutes. This enables us to monitor the phase evolution of products over the course of reaction, revealing that CsBr is the initial species formed, followed by Cs4PbBr6, and finally CsPbBr3. Further, formation of monodisperse CsBr nanocrystals is demonstrated in a bromide-deficient and lead-abundant solution. The CsBr can only be transformed into CsPbBr3 nanocubes if additional bromide is added. Our results indicate a fundamentally different growth mechanism for CsPbBr3 in comparison with more established semiconductor nanocrystal systems and reveal the critical role of the chemical availability of bromide for the growth reactions.<br>

Role of boric acid in the formation of poly(vinyl alcohol)–iodine complexes in undrawn films

Polymer ◽  
2010 ◽  
Vol 51 (3) ◽  
pp. 687-693 ◽  
Author(s):  
Kumiko Ohishi ◽  
Toshiaki Itadani ◽  
Tetsushi Hayashi ◽  
Toshio Nakai ◽  
Fumitaka Horii
Keyword(s):  
Boric Acid ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Iodine Complexes

STUDIES ON THE ADSORPTION OF BORON ON HUMIC ACIDS

1990 ◽  
Vol 70 (3) ◽  
pp. 305-311 ◽  
Author(s):  
BAOHUA GU ◽  
L. E. LOWE
Keyword(s):  
Boric Acid ◽  
Humic Acids ◽  
Organic Matter Content ◽  
Langmuir Adsorption Isotherm ◽  
Matter Content ◽  
Langmuir Equation ◽  
Langmuir Adsorption ◽  
Ph Values ◽  
Ph Range

The adsorption of B, in the form of boric acid, was studied on three precipitated humic acids (HA), representing three distinct soil types. B adsorption by HA was strongly pH-dependent, being low and relatively constant in the pH range 3.0–6.5, increasing markedly up to a peak at near pH 9.5, and then decreasing at still higher pH values. Adsorption isotherms for pH values near 6.7 and 8.8 conformed well to the Langmuir equation. The adsorption maxima (b values), as calculated with the Langmuir equation, ranged from 73 to 207 mmol kg−1 HA at a pH near 8.8, and from 10 to 42 mmol kg−1 at a pH near 6.7. The considerable variation in B adsorption by these HA samples was attributed to "Fe + Al" contents present as contaminants in the HA. The role of HA in B adsorption is expected to be minor in most acid and near neutral soils, but may be of greater significance in soils of high pH and above average organic matter content. Key words: Boron adsorption, boric acid, humic acid, Langmuir adsorption isotherm.

Role of Oxygen on Growth Mechanism and Composition Change of Ba-Ferrite Films

1985 ◽  
Vol 1 (1) ◽  
pp. 41-43 ◽  
Author(s):  
Y. Matsuda ◽  
M. Matsuoka ◽  
M. Naoe ◽  
Y. Hoshi
Keyword(s):  
Growth Mechanism ◽  
Composition Change ◽  
Ferrite Films

The role of alumina in the growth mechanism of Bi(Pb)SrCaCuO whiskers

1995 ◽  
Vol 251 (1-2) ◽  
pp. 149-155 ◽  
Author(s):  
Sergey Lee ◽  
Ki-Jeong Kwon ◽  
Wan-Seon Kim ◽  
Sung-Ik Lee
Keyword(s):  
Growth Mechanism

Synthysis of S Doped Y-Junction Carbon Nanotubes by CVD Method

2011 ◽  
Vol 183-185 ◽  
pp. 1731-1735 ◽  
Author(s):  
Xia Yuan ◽  
Xiao Juan Wu ◽  
Yu Liang An ◽  
Qing Yi Hou
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Vapor Deposition ◽  
Carbon Disulfide ◽  
Growth Mechanism ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Processing Parameters ◽  
Structure And Morphology ◽  
Cvd Method

The sulfur-doped Y-junction carbon nanotubes (S-YCNTs) were prepared by chemical vapor deposition of carbon disulfide using Fe as catalyst. Sulfur can be incorporated into the nanotubes with an identifiable amount, forming sulfur-doped carbon nanotubes. The growth of asymmetrical Y-branches in the nanotubes may be related to the presence of sulfur from precursor. The structure and morphology of S-YCNTs can be controlled by processing parameters. The S-YCNTs were characterized by SEM, TEM, EDX, and XPS, respectively. The growth mechanism of S-YCNTs was discussed in terms of the role of sulfur from carbon feedstock.

The role of ion energy on the growth mechanism of cubic boron nitride films

2004 ◽  
Vol 447-448 ◽  
pp. 125-130 ◽  
Author(s):  
S. Eyhusen ◽  
H. Hofsäss ◽  
C. Ronning
Keyword(s):  
Boron Nitride ◽  
Growth Mechanism ◽  
Cubic Boron Nitride ◽  
Ion Energy ◽  
Boron Nitride Films
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