Doping of semiconductors



n doping This involves substituting Si by neighboring elements that contribute excess electrons. For example, small amounts of P or As can substitute Si.
Since P/As have 5 valence electrons, they behave like Si plus an extra electron. This extra electron contributes to electrical conductivity, and with a sufficiently
large number of such dopant atoms, the material can displays metallic conductivity. With smaller amounts, one has extrinsic ....etc

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Hi friends,
Im doing my project in Antenna and Wave Propagation Area.I need some details about Carbon Nano tube Antenna design.please anyone known email me.
My mail id: [email protected]......
....etc

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Lin Xiao,§
Zhuo Chen,§
Chen Feng
Liang Liu
Zai-Qiao Bai
Yang Wang
Li Qian
Yuying Zhang
Qunqing Li
Kaili Jiang
Shoushan Fan


Abstract

We found that very thin carbon nanotube films, once fed by sound frequency electric currents, could emit loud sounds. This phenomenon
could be attributed to a thermoacoustic effect. The ultra small heat capacity per unit area of carbon nanotube thin films leads to a wide
frequency response range and a high sound pressure level. On the basis of this finding, we made practical ....etc

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Introduction
Direct generation of measurable voltages and currents is possible when a fluids flows over a variety of solids even at the modest speed of a few meters per second. In case of gases underlying mechanism is an interesting interplay of Bernoulli's principle and the See beck effect: Pressure differences along streamlines give rise to temperature differences across the sample; these in turn produce the measured voltage. The electrical signal is quadratically dependent on the Mach number M and proportional to the Seebeck coefficient of ....etc

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can any one please help me to find the power point presentation for A 3D Stackable Carbon Nanotube-based Nonvolatile
Memory (NRAM) topic?....please it is urgent....
the abstract for topic is:
Abstract—A 4Mbit nonvolatile memory with a Carbon
Nanotube (CNT) storage element has been manufactured in a
0.25 μm CMOS process at a production fab. The CNT storage
element is integrated in BEOL, requires minimal additional
processing steps, and only a single additional mask. The memory
can be RESET in 50 nanoseconds and SET in 500 nanoseconds. ....etc

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NANOENGINEERED INDUCTIVELY COUPLED CARBON NANOTUBE WIRELESS STRAIN SENSOR

K. J. Loh, J. P. Lynch, and N.A. Kotov
Department of Civil & Environmental Engineering, University of Michigan, Ann Arbor, MI 48109 USA

Abstract
Since the discovery of carbon nanotubes by Iijima in 1991, researchers have utilized carbon nanotubes for a wide array of applications including nanoelectronics, sensors, and inductively coupled antennas. While current and novel strain transducers can measure strain adequately, their l ....etc

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Carbon Nanotube Antennas for Wireless Communications


Wireless System Evolution
Cellular:
2G – GPRS – 56-114 kbps
2.5G - EDGE – up to 400 kbps (Evolved EDGE – 1 Mbps)
3G:
HSPA – 7.2 Mbps (AT&T completed 2009)
HSPA+ 21/42 Mbps
LTE/WiMAX/IMT-Advanced – 100 Mbps and higher
LTE: 50 Mbps UL, 100 Mbps DL (deployment in 2012 by AT&T)


WLAN:
802.11n:
>100 Mbps in MAC
>3 bits/sec/Hz
802.11ac (< 6GHz) and 802.11ad (60 GHZ)
>500 Mbps ....etc

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Development of the Carbon Fiber Reinforced Carbon-carbon Composite for High Temperature Gas-cooled Reactors
In the present paper. details of the development of the candidate CIC composite are described. In the material development, especially, feasibility of the production. stableness of the supply and cost are much taken into consideration. As the physical properties of the material, high mechanical strength such as tensile and bending, high fracture strain and fracture toughness and low dimensional change by neutron ....etc

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Introduction

Direct generation of measurable voltages and currents is possible when a fluids flows over a variety of solids even at the modest speed of a few meters per second. In case of gases underlying mechanism is an interesting interplay of Bernoulli's principle and the See beck effect: Pressure differences along streamlines give rise to temperature differences across the sample; these in turn produce the measured voltage. The electrical signal is quadratically dependent on the Mach number M and proportional to the Seebeck coefficient o ....etc

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Carbon Nanotube Flow Sensors

Direct generation of measurable voltages and currents is possible when a fluids flows over a variety of solids even at the modest speed of a few meters per second. In case of gases underlying mechanism is an interesting interplay of Bernoulli's principle and the See beck effect: Pressure differences along streamlines give rise to temperature differences across the sample; these in turn produce the measured voltage. The electrical signal is quadratically dependent on the ....etc

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