APL Nameplate
  • Volume/Page
  • Keyword
  • DOI
  • Citation
  • Advanced
   
 
 
 

Flickr Twitter iResearch App Facebook

BROWSE VOLUMES

Year Range: 
Search Issue | RSS Feeds RSS
Previous Issue Next Issue

9 Aug 2004

Volume 85, Issue 6, pp. 855-1088

Issue Cover Spotlight Figure

Appl. Phys. Lett. 85, 1072 (2004); http://dx.doi.org/10.1063/1.1781351 (3 pages)

Liang-Shan Chen, Chao-Hsien Kuo, and Zhen Ye
Enlarge Image | Read More
Return to All Sections
back to top
RSS Feeds

Deposition of Ti2AlC and Ti3AlC2 epitaxial films by magnetron sputtering

O. Wilhelmsson, J.-P. Palmquist, T. Nyberg, and U. Jansson

Appl. Phys. Lett. 85, 1066 (2004); http://dx.doi.org/10.1063/1.1780597 (3 pages) | Cited 42 times

Online Publication Date: 4 August 2004

Full Text: Read Online (HTML) | Download PDF

Show Abstract
Thin films of the Mn+1AXn-phases Ti2AlC and Ti3AlC2 have been deposited by dc magnetron sputtering. In agreement with the Ti–Si–C system, the MAX-phase nucleation is strongly temperature dependent. At 900 °C epitaxial films of Ti2AlC and Ti3AlC2 were grown, but at 700 °C only a cubic (Ti,Al)C phase was formed. In addition, a perovskite carbide, Ti3AlC was grown at 800 °C. A bulk resistivity of 0.51 μΩ m, 0.44 μΩ m, and 1.4 μΩ m was measured for the Ti3AlC2, Ti2AlC, and Ti3AlC films deposited at 900 °C, respectively. By nanoindentation the hardness and Young’s module was determined for an epitaxial Ti3AlC2 film to 20 GPa and 260 GPa, respectively.
Show PACS
73.61.Ng Insulators
68.55.-a Thin film structure and morphology
81.40.Np Fatigue, corrosion fatigue, embrittlement, cracking, fracture, and failure
81.15.Cd Deposition by sputtering
68.55.A- Nucleation and growth
81.40.Jj Elasticity and anelasticity, stress-strain relations
68.35.Gy Mechanical properties; surface strains
62.20.M- Structural failure of materials
62.20.D- Elasticity
72.80.Sk Insulators

Parallel quasi-phase-shifting digital holography

Yasuhiro Awatsuji, Masaki Sasada, and Toshihiro Kubota

Appl. Phys. Lett. 85, 1069 (2004); http://dx.doi.org/10.1063/1.1777796 (3 pages) | Cited 53 times

Online Publication Date: 4 August 2004

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We propose parallel quasi-phase-shifting digital holography as a technique capable of noiseless instantaneous measurement of three-dimensional objects. The technique implements four kinds of phase shifting at a time using a phase shifting array device located in the reference beam. The device is an array of 2×2 phase retarders. We conduct both numerical simulation and preliminary experiment, and the results agree well with those of the conventional phase shifting method. Also, the results are superior to those using a Fresnel transform alone, which is another digital holography method that can achieve instantaneous measurement.
Show PACS
42.40.Kw Holographic interferometry; other holographic techniques

Acoustic imaging and collimating by slabs of sonic crystals made from arrays of rigid cylinders in air

Liang-Shan Chen, Chao-Hsien Kuo, and Zhen Ye

Appl. Phys. Lett. 85, 1072 (2004); http://dx.doi.org/10.1063/1.1781351 (3 pages) | Cited 17 times

Online Publication Date: 4 August 2004

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We show some properties of the acoustic propagation in two-dimensional sonic crystals, formed by parallel rigid cylinders placed in air. The transmission through slabs of sonic crystals and the associated band structures are considered. It is shown that within partial band gaps, the waves tend to be collimated or guided into the direction in which the propagation is allowed. Such a feature also prevails in the situations in which deaf bands appear. We show that within the partial band gaps, a stable imaging effect can be obtained for flat sonic crystal slabs, in analogy to the cases with photonic crystals.
Show PACS
62.65.+k Acoustical properties of solids

Charge transfer from TiO2 into adsorbed benzene diazonium compounds

A. Merson, Th. Dittrich, Y. Zidon, J. Rappich, and Yoram Shapira

Appl. Phys. Lett. 85, 1075 (2004); http://dx.doi.org/10.1063/1.1777801 (2 pages) | Cited 12 times

Online Publication Date: 4 August 2004

Full Text: Read Online (HTML) | Download PDF

Show Abstract
Electron transfer from sol–gel–prepared TiO2 into adsorbed benzene diazonium compounds has been investigated using cyclic voltammetry, x-ray photoelectron spectroscopy, contact potential difference, and surface photovoltage spectroscopy. The results show that the potential of maximum electron transfer depends strongly on the dipole moment of the benzene compound. Two reactive surface sites at which electron transfer occurs have been identified.
Show PACS
73.61.Le Other inorganic semiconductors
73.40.Cg Contact resistance, contact potential
73.50.Pz Photoconduction and photovoltaic effects
68.43.-h Chemisorption/physisorption: adsorbates on surfaces
68.55.A- Nucleation and growth
82.45.Rr Electroanalytical chemistry
82.80.Fk Electrochemical methods
79.60.Bm Clean metal, semiconductor, and insulator surfaces
81.15.Lm Liquid phase epitaxy; deposition from liquid phases (melts, solutions, and surface layers on liquids)

Estimating the diameter∕thickness of a pipe using the primary wave velocity of a hollow cylindrical guided wave

Hideo Nishino, Mikio Takemoto, and Noriyoshi Chubachi

Appl. Phys. Lett. 85, 1077 (2004); http://dx.doi.org/10.1063/1.1781353 (3 pages) | Cited 12 times

Online Publication Date: 4 August 2004

Full Text: Read Online (HTML) | Download PDF

Show Abstract
A method for measuring the diameter/thickness (d∕t) of a pipe using a characteristic of a hollow cylindrical guided wave (HCGW) is presented. The HCGW is an ultrasonic guided wave propagating along a pipe. In the first part of this letter, we briefly show that the primary wave (first-arriving wave packet from an impulse source) of the HCGW achieves a faster group velocity for a larger d∕t. Experimental verifications were carried out for aluminum pipes (several different d∕t’s) using a laser ultrasonic method to generate the HCGW. The experimental results are in fairly good agreement with the theoretical prediction described.
Show PACS
43.35.Zc Use of ultrasonics in nondestructive testing, industrial processes, and industrial products
81.70.Cv Nondestructive testing: ultrasonic testing, photoacoustic testing
06.30.Bp Spatial dimensions (e.g., position, lengths, volume, angles, and displacements)
43.20.Hq Velocity and attenuation of acoustic waves

Noncontact scanning impedance imaging in an aqueous solution

Aaron R. Hawkins, Hongze Liu, Travis E. Oliphant, and Stephen M. Schultz

Appl. Phys. Lett. 85, 1080 (2004); http://dx.doi.org/10.1063/1.1778469 (3 pages) | Cited 4 times

Online Publication Date: 4 August 2004

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We present a method for imaging based on noncontact electrical impedance measurements and mechanical scanning. Measurement results are shown for an initial system based on this concept. An impedance probe design is presented, applicable to the test system. Line-scan data plots of high impedance contrast structures show a good fit to a theoretical physical model. Image resolutions on the order of 100 μm are indicated for the initial system. Two-dimensional impedance images of biological tissue generated by this technique are shown.
Show PACS
87.63.Pn Electrical impedance tomography (EIT)
87.57.C- Image quality
84.37.+q Measurements in electric variables (including voltage, current, resistance, capacitance, inductance, impedance, and admittance, etc.)

Instant curvature measurement for microcantilever sensors

Sangmin Jeon and Thomas Thundat

Appl. Phys. Lett. 85, 1083 (2004); http://dx.doi.org/10.1063/1.1781389 (2 pages) | Cited 13 times

Online Publication Date: 4 August 2004

Full Text: Read Online (HTML) | Download PDF

Show Abstract
A multiple-point deflection technique has been developed for the instant measurement of microcantilever curvature. Eight light-emitting diodes are focused on various positions of a gold-coated silicon cantilever through optical fibers, and temperature change or chemical adsorption induces cantilever bending. The deflection at each point on the cantilever is measured with subnanometer precision by a position-sensitive detector, and thus the curvature of the cantilever is obtained.
Show PACS
07.07.Df Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing
07.10.Cm Micromechanical devices and systems
85.85.+j Micro- and nano-electromechanical systems (MEMS/NEMS) and devices
06.30.Bp Spatial dimensions (e.g., position, lengths, volume, angles, and displacements)
68.43.Mn Adsorption kinetics
42.81.Pa Sensors, gyros

Traveling-wave thermoacoustic electric generator

S. Backhaus, E. Tward, and M. Petach

Appl. Phys. Lett. 85, 1085 (2004); http://dx.doi.org/10.1063/1.1781739 (3 pages) | Cited 34 times

Online Publication Date: 4 August 2004

Full Text: Read Online (HTML) | Download PDF

Show Abstract
Traveling-wave thermoacoustic heat engines have been demonstrated to convert high-temperature heat to acoustic power with high efficiency without using moving parts. Electrodynamic linear alternators and compressors have demonstrated high acoustic-to-electric transduction efficiency as well as long maintenance-free lifetimes. By optimizing a small-scale traveling-wave thermoacoustic engine for use with an electrodynamic linear alternator, we have created a traveling-wave thermoacoustic electric generator; a power conversion system suitable for demanding applications such as electricity generation aboard spacecraft.
Show PACS
84.60.Rb Thermoelectric, electrogasdynamic and other direct energy conversion
07.20.Pe Heat engines; heat pumps; heat pipes
43.35.Ud Thermoacoustics, high temperature acoustics, photoacoustic effect
Return to All Sections
Close

Google Calendar

ADVERTISEMENT

Go to AIP Home   © AIP Publishing LLC
close