Search results

The differential BJH model can be used to explain the source of the false peak in pore size distribution and to calculate the pore size distribution of different shapes of pores in a porous media with a porous structure.
It has an excellent application prospect in the characterization of complex pore structure represented by shale.
Characterization of pore structures in shales through nitrogen adsorption experiment.
Journal of Physical Chemistry C, 2012, 116(31): 16652-16655
Industrial & Engineering Chemistry, 1968, 60(3): 53-70

In this work, we investigate, by μ-Raman spectroscopy the distribution of stress field on a micro-machined structures.
All the structures show an intense variation of stress close to the undercut region.
The 3C-SiC layers were grown on the SOI wafer using classic two-step growth process with silane/propane chemistry.
Fabrication process flow (left panel) and picture of micromachined 3C-SiC test structures (right panel).
It is essentially a cantilever with an anchor on a suspended structure.

Synthesis of carbon onions including Fe3C by chemical vapor deposition using an iron catalyst supported on sodium chloride Leishan Chen1,a, Cunjing Wang1,b and Gairong Chen1,c College of Chemistry and Chemical Engineering, Xinxiang University, Xinxiang 453003, China aemail: chenleishan@yahoo.cn; bemail: wangcunjing@126.com Keywords: Sodium chloride; Acetylene; Chemical vapor deposition; Carbon onions Abstract.
The results show that carbon onions including Fe3C core with a structure of stacked graphitic fragments and diameters in the range 15-50 nm were obtained.
When the product was further heat-treated under vacuum at 1100 ℃, carbon onions with a clear concentric graphitic layer structure were obtained.
The metallic core was encapsulated by carbon layers, which was the typical structure of carbon onions filled with metallic cores, however, the carbon layers of the carbon onion were not arranged as concentric graphitic layers but as a structure of stacked graphitic fragments.
Due to the metallic cores inside the carbon onions were Fe3C, it is assumed that the growth mechanism of the carbon onions can be according to a vapor solid (VS) growth model [6], which can explain the fact that the carbon onions synthesized at 400 ℃ had a structure of stacked graphitic fragments, while carbon onions with concentric graphitic layers were obtained when the product was heat-treated at 1100 ℃.

The phase structure and thermal expansion coefficient were measured by XRD and a high-temperature dilatometry, respectively.
The results show that the crystal structure of Sm1.9Ca0.1Zr2O6.95 ceramic is still pyrochlore.
In this report, calcium cation was added to Sm2Zr2O7 ceramic to investigate the effect of doped cation on the crystal structure and thermal expansion of Sm2Zr2O7 ceramic.
The defect chemistry due to co-doping can be represented using the Kröger-Vink notation by the following equation,
Based on the general crystal-chemical concepts [10], on the premise of the same crystal structure and coordination numbers, the oxide ceramics with weaker chemical bonding tend to have larger thermal expansion coefficient.

Thus, the surface of canna petals is the composite structure with micro-nano scale.
As can be seen, the surface of rose regularly is the composite structure with micro-nano scale.
Progress In Chemistry, 2006, 18( 6) :721-726
[5] Kong Xiangqing, Wu Chengwei.Superior water repellency of mosquito legs with hierarchical micro-nano structures.
Micro and nano structures and morphologies on the wing veins of dragonflies.

It is focused on the study of structures and their effect on the properties of solids, using different experimental techniques and practical applications of nanostructured materials in the context of the latest achievements in the area of research of solid state phenomena.
It is included an analysis of the growth mechanisms of ZnO and its relationship with cathodoluminescence and a second one with the designing of hybrid structures of ZnO@SiO2 to be used in white LEDs.
The integration of the state of the art in its diverse applications, allows us to analyze how a small change in the chemistry of a base material, together with its specific synthesis conditions achieve modifying its structure and properties.

Effect of detergent on the ZnO nanorods structures synthesized via the sol-gel method Roshidah Rusdi1,2,a, Azilah Abd Rahman3,b and Norlida Kamarulzaman1,c 1Centre for Nanomaterials Research, Institute of Science, Level 3 Block C Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia 2Faculty of Applied Science, Universiti Teknologi MARA, 40450 Shah Alam, Selangor 3Centre for Foundation Studies in Science, University of Malaya, 50603 Kuala Lumpur aroshidahrusdi@yahoo.com, bazilahar@um.edu.my, cnorlyk@salam.uitm.edu.my Keywords: ZnO nanorods, sol-gel Abstract.
Pure ZnO are obtained with hexagonal crystal structure and a space group P63mc.
Branford, A.Antonini, M.Paquali: J.Physics and Chemistry of Solids 65, (2004) p 29-37

This whole molecular structure is supported onto Gold substrate.
These 3-Quantum-dots are mounted in a tree like structure supported with Thiol group.
This 3-dots structure stands onto Au substrate supported by Thiol group.
But this structure may vary with the number of QD’s.
Yoshizawa, Conductance through Short DNA Molecules, The Journal of Physical Chemistry C, Vol. 115(8), 3481-3490,(2011)

The higher oxidation and chlorinating ability of sodium hypochlorite contributed to the structure breakdown of indigo [13].
Baksh, Bleaching process for increasing whiteness and lightfastness of kenaf and kenaf-jute blended fabrics,Cellullose Chemistry and Technology, 32, pp. 497-504, 1998
Impacts of pH and molecular structure on ultrasonic degradation of azo dyes, Ultrasonics, 2004, 42:591-596
[17] Tang Ai min，Zhang Hong wei．Influence of ultrasound treatment on accessibility and Region selective oxidation reactivity of cellulose[J].Ultrasonic Sona-chemistry, 2005(12):467-472
Influences of ultrasonic treatment on fiber morphology structure in bleaching process [J].

SEM analysis revealed that the additives improved the stability of the foam’s open-cell structure.
Activated carbon (Ac) has long been recognized for its remarkable ability to adsorb heavy metals, thanks to its porous structure and large surface area [4], [5].
The mixer speed was then reduced to 160 rpm, and the liquid NR latex foam/Ac-2%Cu composite was continuously beaten for 30 seconds to achieve a fine cellular structure.
This shift indicates that increasing Ac content led to finer pores in the foam structure.
Furthermore, Cu deposition on Ac further amplifies these mechanical enhancements, likely due to improved filler-matrix interactions and better stress transfer within the composite structure.