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

5 Dec 2011

Volume 99, Issue 23, Articles (23xxxx)

Issue Cover Spotlight Figure

Appl. Phys. Lett. 99, 233701 (2011); http://dx.doi.org/10.1063/1.3651756 (3 pages)

Melis Hazar, Robert L. Steward, Jr., Chia-Jung Chang, Cynthia J. Orndoff, Yukai Zeng, Mon-Shu Ho, Philip R. LeDuc, and Chao-Min Cheng
Enlarge Image | Read More
Return to All Sections
back to top
RSS Feeds

Modulating material interfaces through biologically-inspired intermediates

Melis Hazar, Robert L. Steward, Jr., Chia-Jung Chang, Cynthia J. Orndoff, Yukai Zeng, Mon-Shu Ho, Philip R. LeDuc, and Chao-Min Cheng

Appl. Phys. Lett. 99, 233701 (2011); http://dx.doi.org/10.1063/1.3651756 (3 pages) | Cited 1 time

Online Publication Date: 5 December 2011

Full Text: Read Online (HTML) | Download PDF

Show Abstract
This letter describes the control of molecular filament organization through biologically inspired intermediates, enabling us to obtain large-area regular nanopatterns. We first studied cultured single filamentous actins on an unmodified glass surface (hydrophilic surface) and introduced myosin-II to modify the control. We then utilized an inorganic salt crystallization approach on the response of these two proteins, actin filament and myosin-II, to analyze the resultant spatially localized patterns. Through the utilization of myosin-II and the salt crystallization approach, we were able to induce the filament orientation of 63°; while without myosin-II, we induced an orientation of 90°.
Show PACS
87.14.E- Proteins
81.16.Dn Self-assembly
87.15.R- Reactions and kinetics
87.15.nt Crystallization

Two-photon focal modulation microscopy in turbid media

Ke Si, Wei Gong, Nanguang Chen, and Colin J. R. Sheppard

Appl. Phys. Lett. 99, 233702 (2011); http://dx.doi.org/10.1063/1.3665936 (3 pages)

Online Publication Date: 6 December 2011

Full Text: Read Online (HTML) | Download PDF

multimedia

Show Abstract
The image formation of two-photon focal modulation microscopy (2PFMM) in turbid media is theoretically investigated. The results show that compared with conventional two-photon fluorescence microscopy, the ballistic excitation of 2PFMM is concentrated in a much smaller region around the focal point and decays more rapidly outside the focal volume, while the scattered excitation is largely suppressed. When focuses at 1600 μm, the signal-to-background ratio and signal-to-noise ratio of 2PFMM are improved by 30 dB and 18 dB, respectively, indicating that 2PFMM can achieve a large imaging penetration depth.
Show PACS
07.60.Pb Conventional optical microscopes

Microwave Debye relaxation analysis of dissolved proteins: Towards free-solution biosensing

T. H. Basey-Fisher, S. M. Hanham, H. Andresen, S. A. Maier, M. M. Stevens, N. M. Alford, and N. Klein

Appl. Phys. Lett. 99, 233703 (2011); http://dx.doi.org/10.1063/1.3665413 (3 pages)

Online Publication Date: 8 December 2011

Full Text: Read Online (HTML) | Download PDF

Show Abstract
Aqueous solutions of a variety of proteins at different concentrations are examined through microwave spectroscopy and compared to sodium chloride and polystyrene nanospheres. The complex permittivity is analysed in terms of the Debye model and the Stokes-Einstein-Debye relation in conjunction with the Maxwell-Garnett equation. According to Einstein’s classical theory of viscosity with Brenner’s adaptation [H. Brenner, Chem. Eng. Sci. 27, 1069 (1972)] for arbitrary solute shapes, the ratio of the alterations of static permittivity and relaxation time of low concentration solutions is found to be independent of concentration and determined by the molecular shape. Our results represent a route towards free-solution identification through molecular finger-printing.
Show PACS
87.15.M- Spectra of biomolecules
87.15.N- Properties of solutions of macromolecules
87.15.R- Reactions and kinetics
36.20.Kd Electronic structure and spectra
87.14.E- Proteins
87.15.B- Structure of biomolecules

Microparticle trapping in an ultrasonic Bessel beam

Youngki Choe, Jonathan W. Kim, K. Kirk Shung, and Eun Sok Kim

Appl. Phys. Lett. 99, 233704 (2011); http://dx.doi.org/10.1063/1.3665615 (3 pages) | Cited 4 times

Online Publication Date: 8 December 2011

Full Text: Read Online (HTML) | Download PDF

Show Abstract
This paper describes an acoustic trap consisting of a multi-foci Fresnel lens on 127 μm thick lead zirconate titanate sheet. The multi-foci Fresnel lens was designed to have similar working mechanism to an Axicon lens and generates an acoustic Bessel beam, and has negative axial radiation force capable of trapping one or more microparticle(s). The fabricated acoustic tweezers trapped lipid particles ranging in diameter from 50 to 200 μm and microspheres ranging in diameter from 70 to 90 μm at a distance of 2 to 5 mm from the tweezers without any contact between the transducer and microparticles.
Show PACS
43.35.-c Ultrasonics, quantum acoustics, and physical effects of sound

Smart catheter flow sensor for real-time continuous regional cerebral blood flow monitoring

Chunyan Li, Pei-Ming Wu, Jed A. Hartings, Zhizhen Wu, Chong H. Ahn, David LeDoux, Lori A. Shutter, and Raj K. Narayan

Appl. Phys. Lett. 99, 233705 (2011); http://dx.doi.org/10.1063/1.3669705 (4 pages) | Cited 4 times

Online Publication Date: 9 December 2011

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We present a smart catheter flow sensor for real-time, continuous, and quantitative measurement of regional cerebral blood flow using in situ temperature and thermal conductivity compensation. The flow sensor operates in a constant-temperature mode and employs a periodic heating and cooling technique. This approach ensures zero drift and provides highly reliable data with microelectromechanical system-based thin film sensors. The developed flow sensor has a sensitivity of 0.973 mV/ml/100 g/min in the range from 0 to 160 ml/100 g/min with a linear correlation coefficient of R2 = 0.9953. It achieves a resolution of 0.25 ml/100 g/min and an accuracy better than 5 ml/100 g/min.
Show PACS
87.19.U- Hemodynamics
07.07.Df Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing
87.85.-d Biomedical engineering
87.19.um Blood-brain barrier
87.85.D- Applied neuroscience
Return to All Sections
Close

Google Calendar

ADVERTISEMENT

Go to AIP Home   © AIP Publishing LLC
close