scholarly journals Regiocontrolled dimerization of asymmetric diazaheptacene derivatives toward X-shaped porous semiconductors

2020 ◽  
Vol 11 (41) ◽  
pp. 11235-11243
Author(s):  
Guowei Zhang ◽  
Ning Xue ◽  
Wen Gu ◽  
Xingzhou Yang ◽  
Aifeng Lv ◽  
...  
Keyword(s):  
Porous Materials ◽  
Open Channels ◽  
Porous Semiconductors

The synthesis of conformationally rigid X-shaped PAHs by regiocontrolled cyclodimerization of diazaheptacene diimides is presented. The resulting porous materials exhibit enhanced semiconducting behaviors with large open channels.

In Situ microscopy of the anodic etching of silicon

1995 ◽  
Vol 53 ◽  
pp. 232-233
Author(s):  
Frances M. Ross ◽  
Peter C. Searson
Keyword(s):  
Composite Structures ◽  
High Surface ◽  
High Surface Area ◽  
Chemical Properties ◽  
Selective Etching ◽  
Silicon On Insulator ◽  
Second Phase ◽  
Porous Layers ◽  
New Class ◽  
Porous Semiconductors

Porous semiconductors represent a relatively new class of materials formed by the selective etching of a single or polycrystalline substrate. Although porous silicon has received considerable attention due to its novel optical properties1, porous layers can be formed in other semiconductors such as GaAs and GaP. These materials are characterised by very high surface area and by electrical, optical and chemical properties that may differ considerably from bulk. The properties depend on the pore morphology, which can be controlled by adjusting the processing conditions and the dopant concentration. A number of novel structures can be fabricated using selective etching. For example, self-supporting membranes can be made by growing pores through a wafer, films with modulated pore structure can be fabricated by varying the applied potential during growth, composite structures can be prepared by depositing a second phase into the pores and silicon-on-insulator structures can be formed by oxidising a buried porous layer. In all these applications the ability to grow nanostructures controllably is critical.

Porous materials from cellulose nanocrystal and mxene surfactants at the oil/water interface

2020 ◽  
Author(s):  
Bingqing qian ◽  
Haiqiao Wang ◽  
Dong Wang ◽  
Hao-Bin Zhang ◽  
Jessica Wu ◽  
...  
Keyword(s):  
Porous Materials ◽  
Cellulose Nanocrystal ◽  
Water Interface ◽  
Oil Water

Porous materials: Magic foam

Nature China ◽  
2013 ◽  
Author(s):  
Felix Cheung
Keyword(s):  
Porous Materials

Effect of structure of porous materials on their self-cleaning from a liquid pha

2018 ◽  
Vol 4 (4) ◽  
pp. 52-63
Author(s):  
V. Yu. Shumskaya ◽  
S. F. Zhandarov ◽  
L. A. Kalinin ◽  
L. F. Ivanov ◽  
V. V. Snezhkov ◽  
...  
Keyword(s):  
Porous Materials ◽  
Self Cleaning ◽  
Effect Of Structure

Uniform Water Flows within Rectangular Open Channels of Composite Roughness

2012 ◽  
Vol 2 (2) ◽  
pp. 137-139
Author(s):  
Demetriou J Demetriou J ◽  
◽  
Retsinis E Retsinis E
Keyword(s):  
Open Channels ◽  
Water Flows

INVERSE ANALYSIS TO OBTAIN THE PRESSURE-DEPENDENT PERMEABILITY OF MICRO/NANO POROUS MATERIALS

2020 ◽  
Vol 51 (16) ◽  
pp. 1445-1454
Author(s):  
Lei-Lei Liu ◽  
Feng-Xian Sun ◽  
Xin-Lin Xia
Keyword(s):  
Porous Materials ◽  
Inverse Analysis
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