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

29 Aug 2011

Volume 99, Issue 9, Articles (09xxxx)

Issue Cover Spotlight Figure

Appl. Phys. Lett. 99, 094101 (2011); http://dx.doi.org/10.1063/1.3629783 (3 pages)

Tomasz Szymborski, Piotr M. Korczyk, Robert Hołyst, and Piotr Garstecki
Enlarge Image | Read More
Return to All Sections
back to top
RSS Feeds

Ionic polarization of liquid-liquid interfaces; dynamic control of the rate of electro-coalescence

Tomasz Szymborski, Piotr M. Korczyk, Robert Hołyst, and Piotr Garstecki

Appl. Phys. Lett. 99, 094101 (2011); http://dx.doi.org/10.1063/1.3629783 (3 pages) | Cited 2 times

Online Publication Date: 29 August 2011

Full Text: Read Online (HTML) | Download PDF

Show Abstract
Electrostatic forces are the strongest interactions in soft matter physics, yet they are usually screened by ions present in the solutions. Here we demonstrate that the extent of ionic polarization of liquid-liquid interfaces can be dynamically controlled via appropriate choice of the strength and frequency of the external electric field. Results of microfluidic experiments on electro-coalescence of droplets of aqueous solutions of salt provide guidelines for optimization of the process.
Show PACS
47.65.-d Magnetohydrodynamics and electrohydrodynamics
47.55.df Breakup and coalescence
47.85.Np Fluidics
47.61.-k Micro- and nano- scale flow phenomena

Effect of pH on Cu(II) crystal growth onto the surface of chelating fiber

Young Gun Ko and Ung Su Choi

Appl. Phys. Lett. 99, 094102 (2011); http://dx.doi.org/10.1063/1.3631660 (3 pages) | Cited 1 time

Online Publication Date: 29 August 2011

Full Text: Read Online (HTML) | Download PDF

Show Abstract
Herein, the effect of pH on Cu(II) crystal growth onto the surface of chelating fiber is presented. Poly(acryloamidino ethyleneamine) and poly(acryloamidino diethylenediamine) are synthesized as chelating polymers, and Cu(OH)2 crystal growth with the change of pH in an aqueous solution are observed using field-emission scanning electron microscopy. It is shown that the shapes of grown Cu(II) crystals on the chelating polymers depend on their alkyl amine numbers. The best fits of the isotherm data for Cu2+ adsorption and Cu(OH)2 crystal growth on the chelating polymers are obtained by means of our developed model.
Show PACS
81.10.Dn Growth from solutions
82.45.Aa Electrochemical synthesis
68.37.Hk Scanning electron microscopy (SEM) (including EBIC)

Micro-assembly using optically controlled bubble microrobots

Wenqi Hu, Kelly S. Ishii, and Aaron T. Ohta

Appl. Phys. Lett. 99, 094103 (2011); http://dx.doi.org/10.1063/1.3631662 (3 pages) | Cited 6 times

Online Publication Date: 29 August 2011

Full Text: Read Online (HTML) | Download PDF

Show Abstract
Bubbles controlled by optically induced heating were made to function as novel microrobots for micromanipulation and micro-assembly. Using light patterns generated by a commercial computer projector, bubble microrobots were controlled and used to manipulate glass microbeads and perform the micro-assembly of micro-blocks and cell-encapsulating hydrogel beads. Two manipulation modes, pulling and pushing, were used to move micro-objects into place and manipulate glass beads with a velocity of up to 350 μm/s. The simultaneous independent control of three bubble robots was also demonstrated.
Show PACS
81.16.-c Methods of micro- and nanofabrication and processing
85.85.+j Micro- and nano-electromechanical systems (MEMS/NEMS) and devices

Enhancement of ultrasonic surface waves at wedge tips and angled defects

R. S. Edwards, B. Dutton, A. R. Clough, and M. H. Rosli

Appl. Phys. Lett. 99, 094104 (2011); http://dx.doi.org/10.1063/1.3629772 (3 pages) | Cited 5 times

Online Publication Date: 1 September 2011

Full Text: Read Online (HTML) | Download PDF


See Also: Publisher's Note

Show Abstract
The behaviour of sound waves interacting with wedges has attracted interest from researchers in geophysics and non-destructive testing. We consider here the near-field behaviour of Rayleigh waves incident on wedges and surface-breaking defects which propagate at an angle to the surface, such as rolling contact fatigue on rails. It has been shown that, for a detection point on the edge of the crack tip, a very large signal enhancement is observed for shallow angles. We explain this behaviour through considering the effect of the defect geometry, with changes in the frequency·thickness product leading to mode-conversion of the incident Rayleigh wave.
Show PACS
68.35.Iv Acoustical properties
62.65.+k Acoustical properties of solids
46.40.Cd Mechanical wave propagation (including diffraction, scattering, and dispersion)
43.35.Cg Ultrasonic velocity, dispersion, scattering, diffraction, and attenuation in solids; elastic constants
43.35.Pt Surface waves in solids and liquids

N-channel metal-oxide-semiconductor characterization with static and dynamic backside laser reflectance modulation techniques

J. K. J. Teo, C. M. Chua, L. S. Koh, and J. C. H. Phang

Appl. Phys. Lett. 99, 094105 (2011); http://dx.doi.org/10.1063/1.3633108 (2 pages)

Online Publication Date: 1 September 2011

Full Text: Read Online (HTML) | Download PDF

Show Abstract
An n-channel metal-oxide-semiconductor (NMOS) transistor has been characterized using backside laser reflectance modulation based on static and dynamic techniques. The static techniques do not have the required sensitivity. With the dynamic technique, the reflectance modulations of the channel at different operating points of the NMOS transistor are distinct, with the pinch-off clearly visible.
Show PACS
85.30.Tv Field effect devices
42.60.Fc Modulation, tuning, and mode locking

Harvesting low grade heat to generate electricity with thermosyphon effect of room temperature liquid metal

Peipei Li and Jing Liu

Appl. Phys. Lett. 99, 094106 (2011); http://dx.doi.org/10.1063/1.3635393 (3 pages) | Cited 4 times

Online Publication Date: 2 September 2011

Full Text: Read Online (HTML) | Download PDF

Show Abstract
Based on thermosyphon effect of room temperature liquid metal, a technical strategy of harvesting low grade heat to generate electricity was proposed. A conceptual system was constructed and an open circuit voltage of 2.62 V with an electrical output power of 110 mW was yielded when the heating power was 45.6 W. This method resolves the difficulty of installing an electric generator in confined space and significantly enlarges the area for converting heat to electricity. Due to its simplicity, avoidance of moving parts, wide working temperature range, and self powering feature, this electric generation system is extremely reliable, completely silent, and flexible.
Show PACS
84.60.Rb Thermoelectric, electrogasdynamic and other direct energy conversion
Return to All Sections
Close

Google Calendar

ADVERTISEMENT

Go to AIP Home   © AIP Publishing LLC
close