I. Theoretical derivation of synchronization equations for two anharmonic oscillators We start with the slow time equation[1] for two oscillators with two feedback[2, 3] terms: one which is common to both oscillators (fc), and one that affects the corresponding oscillator only (fi, i=1,2). These are í µí±‘í µí°´̃ 1 í µí±‘í µí±‡ − í µí±– (í µí»¿ 1 2 + í µí¼† 11 |í µí°´̃ 1 | 2) í µí°´̃ 1 + í µí°´̃ 1 ...

Nanoelectromechanical systems (NEMS) based on nanomaterials, especially NEMS resonators made of suspended nanowires, nanotubes or nanosheets have emerged as promising devices for many sensing applications. However, operation of such NEMS resonators in liquids is usually difficult due to strong viscous damping. Here we present our progress in developing NEMS devices based on suspended nanomateri...

Until recently, natural gas was an also-ran in the sweepstakes for changing the face of transportation in the United States, even though expanded reliance on natural gas vehicles (NGVs) holds the promise of reducing carbon emissions, reducing dependence on oil, and even lowering transportation costs. Recently, however, interest in natural gas as a transportation fuel has grown, as shale gas res...

İmalat teknolojisindeki gelişmeler neticesinde ortaya çıkan mikro ve nano elektromekanik sistemler (MEMS NEMS); biyosensörler, aktüatörler atomik kuvvet mikroskopları (AKM) gibi yapıya sahip sistemlerde çok yaygın olarak kullanılmaktadır. NEMS MEMS’ de kiriş veya benzeri elemanlar yapılar bulunmaktadır. Bu sabit kesitli olduğu değişken kesitlere olabilmektedirler. Söz konusu içindeki elemanları...

Our work in carbon-microelectromechanical systems (C-MEMS) suggests that C-MEMS might provide a very interesting material and microfabrication approach to battery miniaturization, active DNA arrays and a wide variety of chemical and biological sensors. In C-MEMS, photoresist is patterned by photolithography and subsequently pyrolyzed at high-temperatures in an oxygen-free environment. We establ...

Self-sustained mechanical vibrations of a disc-type microfabricated resonator were experimentally observed when a continuous wave (CW) laser beam was focused on the periphery of the disc (for a 40 μm diameter resonator, natural frequency 0.89MHz, the laser power above a 250 W threshold was required). A theoretical model for self-oscillatory behavior has been developed based on FEM analysis of a...

A robust and facile approach for making single-crystal-diamond MEMS and NEMS devices is presented. The approach relies entirely on commercial diamond material and standard cleanroom processes. As an example, batch fabrication of cantilever beams of thickness down to 45 nm and aspect ratios exceeding 2000:1 is demonstrated.

This contribution describes recent applications of supercomputers to describing phenomena occurring on the nanometer scale, which evade direct experimental observation. Dependable ab initio calculations can determine, whether all-carbon nanostructures may become metallic or even magnetic. Computer simulations help us understand, how to design nanostructures with unusual properties, such as high...

Graphene, an atomically thin sheet consisting of only one layer of carbon atoms, attracts intensive research interest since its recent discovery [1], not only due to the simple fabrication process and its unique electronic properties, but also because of the ultimate mechanical strength as well [2], especially for nanoelectromechanical system (NEMS) applications. Here we report the preparation ...