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

1 Dec 2008

Volume 93, Issue 22, Articles (22xxxx)

Issue Cover Spotlight Figure

Appl. Phys. Lett. 93, 221101 (2008); http://dx.doi.org/10.1063/1.3036234 (3 pages)

Soon Moon Jeong, Na Young Ha, Mu Guen Chee, Fumito Araoka, Ken Ishikawa, Hideo Takezoe, Suzushi Nishimura, and Goro Suzaki
Enlarge Image | Read More
Return to All Sections
back to top
RSS Feeds

Effect of quantity and configuration of attached bacteria on bacterial propulsion of microbeads

Bahareh Behkam and Metin Sitti

Appl. Phys. Lett. 93, 223901 (2008); http://dx.doi.org/10.1063/1.3040318 (3 pages) | Cited 21 times

Online Publication Date: 1 December 2008

Full Text: Read Online (HTML) | Download PDF

Show Abstract
Flagellated chemotactic bacteria have been utilized as actuators for propulsion of polystyrene microbeads by randomly attaching several bacteria on their surface. In this work, a plasma-based bacteria patterning technique is developed and used to limit bacteria attachment to approximately half of the microbead’s surface. Consequently, the effect of quantity and configuration of the attached bacteria on propulsion speed is studied experimentally. It is shown that the correlation between the propulsion speed and the number of bacteria is a strong function of the configuration of the bacteria and it follows one of the two distinct trends quantified by the proposed stochastic model.
Show PACS
87.15.R- Reactions and kinetics
87.15.B- Structure of biomolecules

Lateral-driven continuous magnetophoretic separation of blood cells

Jinhee Jung and Ki-Ho Han

Appl. Phys. Lett. 93, 223902 (2008); http://dx.doi.org/10.1063/1.3036898 (3 pages) | Cited 10 times

Online Publication Date: 1 December 2008

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We present a method for the lateral-driven continuous magnetophoretic separation of red and white blood cells from peripheral whole blood, based on their native magnetic properties. The separation is achieved using a high-gradient magnetic field, caused by a ferromagnetic wire array inlaid on glass substrate. The wire array creates an even lateral magnetophoretic force on the whole area of the microchannel, improving the separation efficiency and throughput. When the flow rate and external magnetic flux were 20 μl/h and 0.3 T, respectively, the microseparator continuously separated out 93.9% of red blood cells and 89.2% of white blood cells from the whole blood.
Show PACS
87.85.Ox Biomedical instrumentation and transducers, including micro-electro-mechanical systems (MEMS)
47.85.Np Fluidics
87.18.-h Biological complexity
85.85.+j Micro- and nano-electromechanical systems (MEMS/NEMS) and devices

Room-temperature nanolaser from CdSe nanotubes embedded in anodic aluminum oxide nanocavity arrays

Tsung-Ju Lin, Hsin-Liang Chen, Yang-Fang Chen, and Soofin Cheng

Appl. Phys. Lett. 93, 223903 (2008); http://dx.doi.org/10.1063/1.3028648 (3 pages) | Cited 4 times

Online Publication Date: 1 December 2008

Full Text: Read Online (HTML) | Download PDF

Show Abstract
Room-temperature visible lasing in CdSe semiconductor nanotube arrays embedded in anodic aluminum oxide template has been demonstrated. The cylindrical nanocavities of anodic aluminum oxide template form laser resonators, and the laser oscillation was achieved through whispering gallery mode gain from the interior semiconductor nanotubes. The linearly polarized stimulated emission, the one dimensionality, and the chemical accessibility to nanotubes render them significant potential for serving as various applications in optoelectronic devices.
Show PACS
78.45.+h Stimulated emission
42.55.Sa Microcavity and microdisk lasers

Land-contrast self-referencing interferometric protein microarray

Xuefeng Wang, Ming Zhao, and David D. Nolte

Appl. Phys. Lett. 93, 223904 (2008); http://dx.doi.org/10.1063/1.3040303 (3 pages) | Cited 4 times

Online Publication Date: 2 December 2008

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We present a nonfluorescent protein microarray, the land-contrast BioCD, on which interferometric contrast is induced by a patterned substrate rather than by patterned protein. The substrate is an oxidized silicon wafer with etched spot patterns. Within the spots the SiO2 thickness is 140 nm and on the land it is 77 nm. The spot and the land have equal reflectance but opposite interferometric quadrature responses for protein layer. Protein is evenly immobilized on the entire chip and detected by reflectometry. The contrast between spot and land is directly converted to protein thickness.
Show PACS
87.85.Pq Biomedical imaging
87.85.J- Biomaterials
87.14.E- Proteins

Biomicrofluidic lab-on-chip device for cancer cell detection

J. H. He, J. Reboud, H. Ji, L. Zhang, Y. Long, and C. Lee

Appl. Phys. Lett. 93, 223905 (2008); http://dx.doi.org/10.1063/1.3040313 (3 pages)

Online Publication Date: 3 December 2008

Full Text: Read Online (HTML) | Download PDF

Show Abstract
A lab-on-a-chip microfluidic device was designed, fabricated, and tested to be used in cancer cell or disease cell detection in body fluids. Mixtures of breast cancer cells MCF-7 and control cells MCF-10A were captured by meandering weir filters in microfluidic channels. A selective fluorescent complex 17β-estradiol-bovine serum albumin-fluorescein isothiocyanate enabled to specifically detect MCF-7 after only 4 min of contact. These signals are about seven times stronger than that of a labeling performed on conventional glass slides following the same protocol. The simple method could have the potential to replace complex existing cancer or disease detection schemes.
Show PACS
87.85.fk Biosensors
87.85.Ox Biomedical instrumentation and transducers, including micro-electro-mechanical systems (MEMS)
87.80.Ek Mechanical and micromechanical techniques
87.15.mq Luminescence

The acoustic response from individual attached and unattached rigid shelled microbubbles

Mairead B. Butler, David H. Thomas, Stephen D. Pye, Carmel M. Moran, W. Norman McDicken, and Vassilis Sboros

Appl. Phys. Lett. 93, 223906 (2008); http://dx.doi.org/10.1063/1.3040699 (3 pages) | Cited 4 times

Online Publication Date: 3 December 2008

Full Text: Read Online (HTML) | Download PDF

Show Abstract
A comparison of the acoustic response of attached and unattached individual microbubbles is presented. biSphere™ was insonated by 1.6 MHz ultrasound, peak negative acoustic pressures of 550 and 800 kPa, and the unprocessed radio frequency echo data collected. Comparison of the mean backscatter pressure from unattached and attached biSphere™ at these pressures showed no significant difference. No backscatter was detected for attached microbubbles insonated at 300 kPa. We surmised that at 550 and 800 kPa the rigid-shelled microbubble cracked on insonation, resulting in backscatter from an air microbubble in both cases. The dissolution rate of the gas was slower for attached biSphere™.
Show PACS
87.63.D- Ultrasonography
43.25.Yw Nonlinear acoustics of bubbly liquids
Return to All Sections
Close

Google Calendar

ADVERTISEMENT

Go to AIP Home   © AIP Publishing LLC
close