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

25 Apr 2011

Volume 98, Issue 17, Articles (17xxxx)

Issue Cover Spotlight Figure

Appl. Phys. Lett. 98, 171102 (2011); http://dx.doi.org/10.1063/1.3582035 (3 pages)

Shigeru Nakayama, Satomi Ishida, Satoshi Iwamoto, and Yasuhiko Arakawa
Enlarge Image | Read More
Return to All Sections
back to top
RSS Feeds

Design and synthesis of superhydrophobic carbon nanofiber composite coatings for terahertz frequency shielding and attenuation

Arindam Das, Constantine M. Megaridis, Lei Liu, Tao Wang, and Abhijit Biswas

Appl. Phys. Lett. 98, 174101 (2011); http://dx.doi.org/10.1063/1.3583523 (3 pages) | Cited 4 times

Online Publication Date: 25 April 2011

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We report design and synthesis of polymer-based large-area superhydrophobic carbon nanofiber (CNF) composite coatings for tunable electromagnetic interference shielding and attenuation in the terahertz (THz) frequency regime. Such coatings with different CNF/polymer weight ratios are characterized by a frequency domain THz spectroscopy system. A maximum THz shielding effectiveness of ∼ 32 dB was measured in the examined frequency range of 570–630 GHz. Coating attenuation level varied with CNF loading. Two-dimensional distributions of power attenuation at 600 GHz showed good spatial uniformity. The present composite coatings, in addition to their self-cleaning property, have high potential for advanced technology high-frequency applications.
Show PACS
81.05.Qk Reinforced polymers and polymer-based composites
78.70.Gq Microwave and radio-frequency interactions
07.50.Hp Electrical noise and shielding equipment
Author Select

Reaction-diffusion analysis for one-step plasma etching and bonding of microfluidic devices

Michel Rosso, Volkert van Steijn, Louis C. P. M. de Smet, Ernst J. R. Sudhölter, Chris R. Kleijn, and Michiel T. Kreutzer

Appl. Phys. Lett. 98, 174102 (2011); http://dx.doi.org/10.1063/1.3578450 (3 pages)

Online Publication Date: 25 April 2011

Full Text: Read Online (HTML) | Download PDF

Show Abstract
A self-similar reaction front develops in reactive ion etching when the ions penetrate channels of shallow height h. This relates to the patterning of microchannels using a single-step etching and bonding, as described by Rhee et al. [Lab Chip 5, 102 (2005)] . Experimentally, we report that the front location scales as xf ∼ ht1/2 and the width is time-invariant and scales as δ ∼ h. Mean-field reaction-diffusion theory and Knudsen diffusion give a semiquantitative understanding of these observations and allow optimization of etching times in relation to bonding requirements.
Show PACS
81.65.Cf Surface cleaning, etching, patterning
52.77.Bn Etching and cleaning

Low voltage electron diffractive imaging of atomic structure in single-wall carbon nanotubes

Osamu Kamimura, Yosuke Maehara, Takashi Dobashi, Keita Kobayashi, Ryo Kitaura, Hisanori Shinohara, Hiroyuki Shioya, and Kazutoshi Gohara

Appl. Phys. Lett. 98, 174103 (2011); http://dx.doi.org/10.1063/1.3582240 (3 pages) | Cited 5 times

Online Publication Date: 26 April 2011

Full Text: Read Online (HTML) | Download PDF

Show Abstract
The demand for atomic-scale analysis without serious damage to the specimen has been increasing due to the spread of applications with light-element three-dimensional (3D) materials. Low voltage electron diffractive imaging has the potential possibility to clarify the atomic-scale structure of 3D materials without causing serious damage to specimens. We demonstrate low-voltage (30 kV) electron diffractive imaging of single-wall carbon nanotube at a resolution of 0.12 nm. In the reconstructed pattern, the intensity difference between single carbon atom and two overlapping atoms can be clearly distinguished. The present method can generally be applied to other materials including biologically important ones.
Show PACS
61.48.De Structure of carbon nanotubes, boron nanotubes, and other related systems
61.46.Fg Nanotubes

In situ and noncontact measurement of silicon membrane thermal conductivity

Xi Liu, Xiaoming Wu, and Tianling Ren

Appl. Phys. Lett. 98, 174104 (2011); http://dx.doi.org/10.1063/1.3583603 (3 pages)

Online Publication Date: 27 April 2011

Full Text: Read Online (HTML) | Download PDF

Show Abstract
An in situ and noncontact method using micro-Raman spectroscopy for silicon membrane thermal conductivity measurement was proposed. The considerations of temperature dependence of thermal conductivity and nonuniform temperature distribution in the laser spot improved the measurement accuracy. The thermal conductivity was obtained by solving two-dimensional nonlinear Fourier heat transfer equation and reconstruction of the Raman spectrum of specimen in laser spot. At room temperature, the thermal conductivities of two silicon membranes in the thickness of ∼ 495 nm and ∼ 699 nm were measured as 118±6 W/(m K) and 123±10 W/(m K), respectively, which are consistent with theoretic values from Boltzmann transfer equation.
Show PACS
82.45.Mp Thin layers, films, monolayers, membranes
66.70.-f Nonelectronic thermal conduction and heat-pulse propagation in solids; thermal waves
78.30.Am Elemental semiconductors and insulators
42.62.-b Laser applications

Magnetically aligned carbon nanotube in nanopaper enabled shape-memory nanocomposite for high speed electrical actuation

Haibao Lu, Jihua Gou, Jinsong Leng, and Shanyi Du

Appl. Phys. Lett. 98, 174105 (2011); http://dx.doi.org/10.1063/1.3585669 (3 pages) | Cited 5 times

Online Publication Date: 29 April 2011

Full Text: Read Online (HTML) | Download PDF

Show Abstract
A new shape-memory nanocomposite that exhibits rapid electrical actuation capabilities is fabricated by incorporating self-assembly multiwalled carbon nanotube (MWCNT) nanopaper and magnetic CNTs into a styrene-based shape-memory polymer (SMP). The MWCNT nanopaper was coated on the surface to give high electrical conductivity to SMP. Electromagnetic CNTs were blended with and, vertically aligned into the SMP resin upon a magnetic field, to facilitate the heat transfer from the nanopaper to the underlying SMP. This not only significantly enhances heat transfer but also gives high speed electrical actuation.
Show PACS
81.07.De Nanotubes
81.16.Dn Self-assembly
75.75.Cd Fabrication of magnetic nanostructures
73.61.Wp Fullerenes and related materials
61.46.Fg Nanotubes
Return to All Sections
Close

Google Calendar

ADVERTISEMENT

Go to AIP Home   © AIP Publishing LLC
close