Measuring Thermal and Thermoelectric Properties of One-Dimensional Nanostructures Using a Microfabricated Device

2003 ◽  
Vol 125 (5) ◽  
pp. 881-888 ◽  
Author(s):  
Li Shi ◽  
Deyu Li ◽  
Choongho Yu ◽  
Wanyoung Jang ◽  
Dohyung Kim ◽  
...  
Keyword(s):  
Silicon Nitride ◽  
Electrical Conductance ◽  
Thermal Conductance ◽  
The Other ◽  
Platinum Resistance ◽  
Measurement Sensitivity ◽  
One Dimensional ◽  
Measurement Results ◽  
Nanotube Bundle ◽  
One Dimensional Nanostructures

We have batch-fabricated a microdevice consisting of two adjacent symmetric silicon nitride membranes suspended by long silicon nitride beams for measuring thermophysical properties of one-dimensional nanostructures (nanotubes, nanowires, and nanobelts) bridging the two membranes. A platinum resistance heater/thermometer is fabricated on each membrane. One membrane can be Joule heated to cause heat conduction through the sample to the other membrane. Thermal conductance, electrical conductance, and Seebeck coefficient can be measured using this microdevice in the temperature range of 4–400 K of an evacuated Helium cryostat. Measurement sensitivity, errors, and uncertainty are discussed. Measurement results of a 148 nm and a 10 nm-diameter single wall carbon nanotube bundle are presented.

Ultra-sensitive thermal conductance measurement of one-dimensional nanostructures enhanced by differential bridge

2012 ◽  
Vol 83 (2) ◽  
pp. 024901 ◽  
Author(s):  
Matthew C. Wingert ◽  
Zack C. Y. Chen ◽  
Shooshin Kwon ◽  
Jie Xiang ◽  
Renkun Chen
Keyword(s):  
Thermal Conductance ◽  
Conductance Measurement ◽  
One Dimensional ◽  
One Dimensional Nanostructures

scholarly journals Rapid sintering of silicon nitride foams decorated with one-dimensional nanostructures by intense thermal radiation

2014 ◽  
Vol 15 (4) ◽  
pp. 045003 ◽  
Author(s):  
Duan Li ◽  
Elisângela Guzi de Moraes ◽  
Peng Guo ◽  
Ji Zou ◽  
Junzhan Zhang ◽  
...  
Keyword(s):  
Silicon Nitride ◽  
Thermal Radiation ◽  
One Dimensional ◽  
Rapid Sintering ◽  
One Dimensional Nanostructures

One-dimensional Nanostructures for Photocatalytic Organic Synthesis

2015 ◽  
Vol 19 (6) ◽  
pp. 484-497 ◽  
Author(s):  
Chuang Han ◽  
Siqi Liu ◽  
Zi-Rong Tang ◽  
Yi-Jun Xu
Keyword(s):  
Organic Synthesis ◽  
One Dimensional ◽  
One Dimensional Nanostructures

scholarly journals Assessing a Linear Nanosystem's Limiting Reliability from its Components

2008 ◽  
Vol 45 (03) ◽  
pp. 879-887 ◽  
Author(s):  
Nader Ebrahimi
Keyword(s):  
Present State ◽  
Size Range ◽  
Two Dimensions ◽  
The Other ◽  
One Dimension ◽  
Present Moment ◽  
One Dimensional ◽  
The One ◽  
Fixed Moment ◽  
Nanosized Systems

Nanosystems are devices that are in the size range of a billionth of a meter (1 x 10-9) and therefore are built necessarily from individual atoms. The one-dimensional nanosystems or linear nanosystems cover all the nanosized systems which possess one dimension that exceeds the other two dimensions, i.e. extension over one dimension is predominant over the other two dimensions. Here only two of the dimensions have to be on the nanoscale (less than 100 nanometers). In this paper we consider the structural relationship between a linear nanosystem and its atoms acting as components of the nanosystem. Using such information, we then assess the nanosystem's limiting reliability which is, of course, probabilistic in nature. We consider the linear nanosystem at a fixed moment of time, say the present moment, and we assume that the present state of the linear nanosystem depends only on the present states of its atoms.

Fabrication of novel La2O2CN2 one-dimensional nanostructures via facile electrospinning combined with cyanamidation technique

2014 ◽  
Vol 250 ◽  
pp. 148-156 ◽  
Author(s):  
Xiaomin Guo ◽  
Xiangting Dong ◽  
Jinxian Wang ◽  
Wensheng Yu ◽  
Guixia Liu
Keyword(s):  
One Dimensional ◽  
One Dimensional Nanostructures

Lower Bounds to the Eigenvalues in One-Dimensional Problems by a Shift in the Weight Function

1970 ◽  
Vol 37 (2) ◽  
pp. 267-270 ◽  
Author(s):  
D. Pnueli
Keyword(s):  
Lower Bound ◽  
Weight Function ◽  
Lower Bounds ◽  
Variational Formulation ◽  
Ritz Method ◽  
The Other ◽  
One Dimensional ◽  
Systematic Shift ◽  
The One ◽  
Detailed Computation

A method is presented to obtain both upper and lower bound to eigenvalues when a variational formulation of the problem exists. The method consists of a systematic shift in the weight function. A detailed procedure is offered for one-dimensional problems, which makes improvement of the bounds possible, and which involves the same order of detailed computation as the Rayleigh-Ritz method. The main contribution of this method is that it yields the “other bound;” i.e., the one which cannot be obtained by the Rayleigh-Ritz method.

scholarly journals The influence of resistivity gradients on shock conditions for a Petschek reconnection geometry

2016 ◽  
Vol 34 (4) ◽  
pp. 421-425
Author(s):  
Christian Nabert ◽  
Karl-Heinz Glassmeier
Keyword(s):  
Magnetic Field ◽  
Necessary Conditions ◽  
The Other ◽  
Diffusion Region ◽  
Two Dimensional ◽  
Characteristic Velocity ◽  
Magnetohydrodynamic Equations ◽  
One Dimensional ◽  
The Magnetic Field ◽  
Alfven Velocity

Abstract. Shock waves can strongly influence magnetic reconnection as seen by the slow shocks attached to the diffusion region in Petschek reconnection. We derive necessary conditions for such shocks in a nonuniform resistive magnetohydrodynamic plasma and discuss them with respect to the slow shocks in Petschek reconnection. Expressions for the spatial variation of the velocity and the magnetic field are derived by rearranging terms of the resistive magnetohydrodynamic equations without solving them. These expressions contain removable singularities if the flow velocity of the plasma equals a certain characteristic velocity depending on the other flow quantities. Such a singularity can be related to the strong spatial variations across a shock. In contrast to the analysis of Rankine–Hugoniot relations, the investigation of these singularities allows us to take the finite resistivity into account. Starting from considering perpendicular shocks in a simplified one-dimensional geometry to introduce the approach, shock conditions for a more general two-dimensional situation are derived. Then the latter relations are limited to an incompressible plasma to consider the subcritical slow shocks of Petschek reconnection. A gradient of the resistivity significantly modifies the characteristic velocity of wave propagation. The corresponding relations show that a gradient of the resistivity can lower the characteristic Alfvén velocity to an effective Alfvén velocity. This can strongly impact the conditions for shocks in a Petschek reconnection geometry.

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