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Influence of Nanopore Shapes on Thermal Conductivity of Two-Dimensional Nanoporous Material

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ABSTRACT

The influence of nanopore shapes on the electronic thermal conductivity (ETC) was studied in this paper. It turns out that with same porosity, the ETC will be quite different for different nanopore shapes, caused by the different channel width for different nanopore shapes. With same channel width, the influence of different nanopore shapes can be approximately omitted if the nanopore is small enough (smaller than 0.5 times EMFP in this paper). The ETC anisotropy was discovered for triangle nanopores at a large porosity with a large nanopore size, while there is a similar ETC for small pore size. It confirmed that the structure difference for small pore size may not be seen by electrons in their moving.

No MeSH data available.


MNMs with different nanopore shapes. a Square nanopore. b Triangle nanopore. c Slit nanopore. Here, d is the side length of a square nanopore and a is the distance between the centers of two adjacent pores
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Fig2: MNMs with different nanopore shapes. a Square nanopore. b Triangle nanopore. c Slit nanopore. Here, d is the side length of a square nanopore and a is the distance between the centers of two adjacent pores

Mentions: With the simulation method applied, the ETCs of MNMs with triangle nanopores and slit nanopores were, respectively, simulated for comparison with that of MNMs with square nanopores. Inelastic boundary conditions were applied in the simulation. The ETC for square nanopore was referred from our previous work [9]. For comparison, a similar nanopore distribution and a similar channel width (same a and d in Fig. 2) were applied for different nanopore shapes. Slit pore in Fig. 2c was set to be very thin with width equal to one tenth of length d. Porosities were calculated by φ = d2/(a2) for square nanopore, φ = d2/(2a2) for triangle nanopore, and φ = d2/(10a2) for slit nanopore, where d is the side length of a square nanopore and a is the distance between the centers of two adjacent pores. The largest porosity of MNMs with slit nanopores and triangle nanopores will be no larger than 10 and 50 %, respectively.Fig. 2


Influence of Nanopore Shapes on Thermal Conductivity of Two-Dimensional Nanoporous Material
MNMs with different nanopore shapes. a Square nanopore. b Triangle nanopore. c Slit nanopore. Here, d is the side length of a square nanopore and a is the distance between the centers of two adjacent pores
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5037102&req=5

Fig2: MNMs with different nanopore shapes. a Square nanopore. b Triangle nanopore. c Slit nanopore. Here, d is the side length of a square nanopore and a is the distance between the centers of two adjacent pores
Mentions: With the simulation method applied, the ETCs of MNMs with triangle nanopores and slit nanopores were, respectively, simulated for comparison with that of MNMs with square nanopores. Inelastic boundary conditions were applied in the simulation. The ETC for square nanopore was referred from our previous work [9]. For comparison, a similar nanopore distribution and a similar channel width (same a and d in Fig. 2) were applied for different nanopore shapes. Slit pore in Fig. 2c was set to be very thin with width equal to one tenth of length d. Porosities were calculated by φ = d2/(a2) for square nanopore, φ = d2/(2a2) for triangle nanopore, and φ = d2/(10a2) for slit nanopore, where d is the side length of a square nanopore and a is the distance between the centers of two adjacent pores. The largest porosity of MNMs with slit nanopores and triangle nanopores will be no larger than 10 and 50 %, respectively.Fig. 2

View Article: PubMed Central - PubMed

ABSTRACT

The influence of nanopore shapes on the electronic thermal conductivity (ETC) was studied in this paper. It turns out that with same porosity, the ETC will be quite different for different nanopore shapes, caused by the different channel width for different nanopore shapes. With same channel width, the influence of different nanopore shapes can be approximately omitted if the nanopore is small enough (smaller than 0.5 times EMFP in this paper). The ETC anisotropy was discovered for triangle nanopores at a large porosity with a large nanopore size, while there is a similar ETC for small pore size. It confirmed that the structure difference for small pore size may not be seen by electrons in their moving.

No MeSH data available.