Lee S. – Page 4 – TechConnect Briefs

Diameter controlled synthesis of carbon nanotubes by CVD using steric-stabilized iron nanoparticle catalysts

Mayya K.S., Lee S., Yeo I-S, Chung U-I, Moon J.T., Samsung Electronics Co.Ltd., KR

Carbon nanotubes (CNT) are the subject of intensive investigation due to their potential applications in nanoelectronics, biological sensors, high performance materials etc. CNTs can be synthesized using variety of techniques of which synthesis using chemical [...]

Intelligent Digital 3-Axis IMU for Automotive and Robotic Applications

Ko H., Park S., Park Y., Choi B-D, Park S., Park Y., Song T., Lim G., Yoo K., Lee A., Lee S-C, Lee S., Lww S.C., Lee A., Lee S-C, Lee S., Lee A., Lee S-C, Lee S., Cho D-I, Choi B-D, Seoul National University, KR

This paper presents the intelligent digital 3-axis IMU (inertial measurement unit) system. The MEMS accelerometer and gyroscope sensing cores are fabricated by using the SBM (Sacrificial Bulk Micromachining) process. The fabricated sensing cores accomplish the [...]

Atomistic Simulations in Nanostructures Composed of Tens of Millions of Atoms: Importance of long-range Strain Effects in Quantum Dots

Korkusinski M., Klimeck G., Xu H., Lee S., Goasguen S., Saied F., Purdue University, US

Realistic calculations of propertioes of nanostructures begin with the determination of equilibrium positions of constituent atoms. The nanoelectronic modeling tool NEMO-3D determines these positions by minimizing the total elastic energy. The displacements are further used [...]

Water-Soluble, Carboxyl-Modified Silicon Nanoparticles

Lee S., Cho W-J, Korea Institute of Science and Technology, KR

Since silicon has both the well-known chemistry and the industrial benefits of non-toxic and low cost, an interest in Si nanoparticles has rapidly increased. We will discuss a practical surface modification of Si nanoparticles prepared [...]

Simulation and Modeling of a Bridge-type Resonant Beam for a Coriolis True Mass Flow Sensor

Lee S., Wang X., Shin W., Xiao Z., Chin K.K., Farmer K.R., Microelectronics Research Center, New Jersey Institute of Technology, US

This paper presents a simulation of a bridge-type resonating beam connected to the tube loop structure of a Coriolis true mass flow sensor[1]. The resonant beam technique, which is comparable to optical[2], piezoresistive[3], and capacitive[4] [...]

Resonant Frequency Shift of Torsional Acutators due to Electrostatic Force

Xiao Z., Sun Y., Li B., Lee S., Sidhu K.S., Chin K.K., Farmer K.R., New Jersey Institute of Technology, US

We have investigated the effect of natural frequency shift in single-crystal silicon, rectangular, electrostatic torsion actuators due to the electrostatic force. The electrostatic actuator was fabricated by using ultra-thin silicon wafer, SU-8 thermal compression bonding, [...]

A New Method to Design Pressure Sensor Diaphragm

Wang X., Li B., Lee S., Sun Y., Roman H.T., Chin K., Farmer K.R., New Jersey Institute of Technology, US

Over the last decade, silicon pressure sensors have undergone a significant growth. In most cases, these MEMS (Microelectromechanical System) devices are manufactured from rectangular or circular diaphragms whose thickness is constant and in the order [...]

A Versatile Nanofabrication Technology for Polymer / Inorganic Composites for Fuel Cell and Pulse Power Applications

Lee S., Breitkopf R., Hwang J., Faguy P., Hunt A., MicroCoating Technologies, Inc., US

An innovative atomizer, capable of producing sub-micron size droplets, in conjunction with Combustion Chemical Vapor Deposition (CCVD), a flame based technique have demonstrated the capability to produce nanoscale hybrid materials with morphological, compositional and internal [...]

Field Emission of Carbon Nanotubes and the Electronic Structure of Fullerenes Encapsulated in Carbon Nanotubes

Cho Y., Kim G., Lee S., Ihm J., Seoul National University, KR

We have performed first-principles calculations on the field emission of carbon nanotubes. The three-dimensional character of the current source, as well as the effect of the external electric field, are explicitly considered. The calculated electron-leakage [...]

3-D Computational Modeling of RF MEMS Switches

Espinosa H.D., Fischer M., Zhu Y., Lee S., Northwestern University, US

Young's modulus and residual stress state of freestanding thin membranes are characterized in this work by means of wafer level experimental techniques. RF MEMS Switches manufactured by Raytheon Systems Co. are investigated using a new [...]