The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Self-organization process of cells involves complicated orchestration of various chemical, physical and mechanical cues, and the underlying mechanism is still poorly understood. Here, we computationally study the three-dimensional (3D) pattern formation process of vascular mesenchymal cells around the interfaces between hydrogels with different physical and mechanical properties. In this dynamic system,...
Single-Walled Carbon Nanotubes (SWCNTs) have been shown to be a promising candidate for flexible electronics, especially logic circuits. However, very little study on SWCNT based analog circuit elements, such as amplifiers and comparators, on flexible substrates has been reported. For practical applications, fully functional flexible electronic devices must have an analog input circuitry to achieve...
In this work ion-selective arrays based on spray-coated electrolyte-gated carbon-nanotube field-effect transistors will be used in an example application for water quality assessment. Several cations like Na+, K+, Ca2+ and anions like Cl− and NO3− are detected with the ion-selective sensor arrays in different bottled mineral waters. For the ion-selective arrays the sensing results of two different...
This paper focuses on the study of an ultrathin Diamond-Like-Carbon layer acting as the mobile part of 2D microresonators. To overcome the low electrical conductivity of amorphous carbon, DLC is used in combination with few nanometer-thick metal layers to manufacture 15 to 20 nm thick membranes suspended over 0.8 to 2.3 µm wide trenches. After a description of the experimental means performed on these...
The transport properties of back-gated graphene field effect transistors (GFETs) can be tuned via chemical doping. In this study, we report alteration of charge transport properties of GFET via 5-(4-hydroxyphenyl)-10,15,20-tri-(p-tolyl) zinc(II) porphyrin (Zn(II)-TTPOH) and its free base counterpart. We propose that, the porphyrin induces p - type doping in graphene.
In this work, a comparison between the electro-optical characteristics of CNT random networks obtained through inkjet printing and spray-deposition on flexible substrates is presented. Transmittance values are similar in both fabrication techniques; however, the sheet resistance of the inkjetted layers diverges significantly with respect to the reference spray-deposited thin film. To overcome this...
In the study of neuronal networks or other cell cultures it is essential to combine information about a single element with the connections developed throughout the whole system. Those data come from different space and time scales, therefore requiring the employment of various techniques to be acquired and combined. Unfortunately, connecting data from more than one experiment is often challenging...
Infrared sensing devices rely on narrow band gap semiconductors grown by expensive and complicated methods such as molecular beam epitaxy and chemical vapor deposition. Colloidal quantum dots (CQDs) offer a low-cost alternative to detect infrared light. In this study, we have successfully demonstrated synthesis of HgTe quantum dots, which can absorb midwave infrared (MWIR) at room temperature. The...
A parametric study is performed on the resonance plasmon scattering modes of nanoscale voids within a metallic nano-rod, in terms of the voids' presence, radius, and position, by implementing total-field/scattered-field (TF/SF) in finite-difference time-domain (FDTD). The study is then extended to investigating voids within clusters of metallic nano-rods. A technique is accordingly developed to employ...
Transition metal dichalcogenide (TMD)-based field effect transistors are currently being actively researched as a post-silicon solution for integrated circuits. This paper discusses two of the major challenges: grain size in polycrystalline TMD monolayer films and chemical doping to improve TMD/metal contacts. The characterization techniques and the correlation with device electrical characteristics...
In this paper, we present the fabrication and thermal conductivity measurements of a 10 nm-diameter Si nanowires (SiNWs) array for thermoelectric (TE) devices applications. The SiNWs were fabricated by bio-template and neutral beam etching techniques. Then, the SiNWs were embedded into spin-on-glass (SOG) for the measurement of the thermal conductivity. The measured thermal conductivities of the SiNWs...
Poly(ethylene glycol) diacrylate (PEGDA) are being investigated for various tissue engineering applications for its biocompatibility and excellent mechanical properties. However, the native PEGDA films can hinder cell adhesion which limits applications in the field of tissue engineering and biomedicine. Recently, nano composite technology has been a particularly hot topic because of it can be used...
A multi-layer coating enabled drug delivery method has been developed here to augment AFM based nanorobot technology. Being developed for over a decade, the AFM based nanorobot has been established as a key concept of nanorobotics, and has been applied in nanomaterial and biomedical related research. In these AFM based nanorobots, however, the AFM tip was mainly used as a mechanical end-effector to...
This paper demonstrates the advantages of a femtosecond-laser-processing method as a novel fabrication technique of waveguides containing such nanocomposites inside glass materials. By focusing the femtosecond laser inside the transparent glass, the nanocomposites are space-selectively precipitated as results of atomic diffusion and crystallization processes. At the same time, the refractive index...
Layer undulation of InGaAs/GaAs/GaAsP strain-balanced quantum well superlattice forms InGaAs nanowires along the bunching steps on a vicinal substrate embedded in the GaAs/GaAsP matrix. When it is used as an absorber in a GaAs single-junction cell, it assists carrier escape from narrow-gap InGaAs and extends photoluminescence lifetime as compared with a planar superlattice. Such a wire structure can...
This paper presents two circuits for implementing the restore operation of a non-volatile (NV) memory cell in which data from a programmable metallization cell (PMC) can be copied (restored) into a static random access memory (SRAM). In the first proposed design, a transmission gate is added to each row of cells of the memory array in which a concurrent error detection (CED) circuit is also present...
This paper proposes a design of a Ternary Content Addressable Memory (TCAM) cell using racetrack memories (RMs) for non-volatile operation. Four RMs are utilized as storage elements and CMOS transistors are used as control elements for executing the write and search operations. The search operation of the TCAM cell utilizes novel circuits to read the RMs and compare data at cell and array levels....
This paper proposes the realization of dual-threshold independent-gate FinFETs by optimizing the FinFET process parameters including the electrode work function, silicon body thickness, and oxide thickness. The optimum values of the FinFET process parameters are derived using BSIM-IMG SPICE model for independent-gate FinFET devices. In optimum dual-threshold independent-gate (IG) FinFETs, a high-threshold...
Content addressable memory (CAM) is an indispensable part of devices such as network data processors, but broad adoption of large CAMs is limited by their area and power overhead. We propose a CAM using memristive devices that achieves high density and scalability and low energy consumption.
IoT edge devices demand ultra-low leakage for lowly duty-cycled applications. It is usually believed that the static near-threshold-voltage (near-Vt) CMOS circuit is the only circuit style that is suitable for designing devices to achieve low power, low leakage, medium performance, and high robustness against PVT variations. In this work, we show that the dynamic circuit can be even better than the...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.