نتایج جستجو برای: nanoscale

تعداد نتایج: 23864  

Journal: :Nano letters 2009
Yong Peng Tony Cullis Beverley Inkson

We report that individual metallic nanowires and nanoobjects can be assembled and welded together into complex nanostructures and conductive circuits by a new nanoscale electrical welding technique using nanovolumes of metal solder. At the weld sites, nanoscale volumes of a chosen metal are deposited using a sacrificial nanowire, which ensures that the nanoobjects to be bonded retain their stru...

2007
X Xu E X Jin S M Uppuluri L Wang

In this work, we investigate light concentration in nanoscale ridge apertures and its applications in nanomanufacturing. Optical transmission of ridge apertures in a metal film is optimized by numerical design using the finite-difference time-domain (FDTD) method. We show that ridge apertures provide an optical transmission enhancement of several orders of magnitude higher than regularly shaped...

2015
Marcelo M. Oliveira Carlos Driemeier Antonio A. S. Curvelo

Nanoscale porosity is critical for cellulose reactivity and can be detrimentally affected by wet pressing. The present study evaluated how wet pressing reduced the nanoscale porosity of a set of pulps produced from sugarcane bagasse. The pulps were produced using hydrothermal treatments, followed by either 160 °C alkaline (sodium hydroxide) or 190 °C organosolv (ethanol-water) pulping. Pulping ...

2013
M. Ayub

The use of nanoscopic fibres for acoustic absorption can potentially result in thinner liners than for conventional acoustic materials. Modelling acoustic mechanisms at the nanoscale requires molecular simulations as the flow behaviour at the nanoscale is in the transition regime (based on Knudsen number). Molecular Dynamics (MD) was identified as a suitable method for simulating the physical p...

In the present study, the dynamic buckling of the graphene sheet coupled by a viscoelastic matrix was studied. In light of the simplicity of Eringen's non-local continuum theory to considering the nanoscale influences, this theory was employed. Equations of motion and boundary conditions were obtained using Mindlin plate theory by taking nonlinear strains of von Kármán and Hamilton's principle ...

Journal: :Nature nanotechnology 2010
Harish Bhaskaran Bernd Gotsmann Abu Sebastian Ute Drechsler Mark A Lantz Michel Despont Papot Jaroenapibal Robert W Carpick Yun Chen Kumar Sridharan

Understanding friction and wear at the nanoscale is important for many applications that involve nanoscale components sliding on a surface, such as nanolithography, nanometrology and nanomanufacturing. Defects, cracks and other phenomena that influence material strength and wear at macroscopic scales are less important at the nanoscale, which is why nanowires can, for example, show higher stren...

Journal: :Nanoscale 2015
Saurabh Bajaj Michael G Haverty Raymundo Arróyave William A Goddard Sadasivan Shankar

Correction for 'Phase stability in nanoscale material systems: extension from bulk phase diagrams' by Saurabh Bajaj et al., Nanoscale, 2015, 7, 9868-9877.

2014
Yang Liu Shikhar Uttam Sergey Alexandrov Rajan K Bista

BACKGROUND The cell and tissue structural properties assessed with a conventional bright-field light microscope play a key role in cancer diagnosis, but they sometimes have limited accuracy in detecting early-stage cancers or predicting future risk of cancer progression for individual patients (i.e., prognosis) if no frank cancer is found. The recent development in optical microscopy techniques...

Journal: :Proceedings of the National Academy of Sciences 2002

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