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Items from 1 to 20 out of 42,069 results

article

Logic‐Gate‐Actuated DNA‐Controlled Receptor Assembly for the Programmable Modulation of Cellular Signal Transduction

Shan Chen, Zhifei Xu, Wen Yang, Xiahui Lin, more

Angewandte Chemie International Edition > 58 > 50 > 18186 - 18190

Programming cells to sense multiple inputs and activate cellular signal transduction cascades is of great interest. Although this goal has been achieved through the engineering of genetic circuits using synthetic biology tools, a nongenetic and generic approach remains highly demanded. Herein, we present an aptamer‐controlled logic receptor assembly for modulating cellular signal transduction. Aptamers...

article

Photosensitive Complementary Inverters Based on n‐Channel MoS₂ and p‐Channel MoTe₂ Transistors for Light‐to‐Frequency Conversion Circuits

Seung Gi Seo, Sung Hun Jin

physica status solidi (RRL) – Rapid Research Letters > 13 > 11 > n/a - n/a

Photosensitive complementary inverters, composed of multilayered molybdenum disulfide (MoS₂) and molybdenum ditelluride (MoTe₂), are demonstrated for the applications that require low power consumption and excellent signal‐to‐noise ratio (SNR). The photosensitive characteristics of MoS₂, along with the negligible photosensitivity of MoTe₂, successfully render them applicable to the light‐to‐frequency...

article

Charged Metal Nanoparticles for Chemoelectronic Circuits

Xing Zhao, Jiahui Guo, Tao Xiao, Yuchun Zhang, more

Advanced Materials > 31 > 45 > n/a - n/a

Although metal nanoparticles (NPs) stabilized with self‐assembled monolayers (SAMs) of various organic ligands have proven useful in applications ranging from chemical sensing, to bionanotechnology, to plasmonics and energy conversion, they have not been widely considered as suitable building blocks of electronic circuitry, largely because metals screen electric fields and prevent electrically tunable...

article

A design procedure for fan-out improvement in all-optical photonic crystal logic design

Hojjat Sharifi, Seyedeh Mehri Hamidi, Keivan Navi

Optical and Quantum Electronics > 2019 > 51 > 10 > 1-13

In this paper, a general method is proposed to improve the fan-out parameter for all-optical logic gates and functions. Two different types of devices are designed to increase the fan-out of a logic operation and its inverted logic. Nonlinear cavities are used to design driving units. Silicon nanocrystal is used as the nonlinear material to create the required frequency shift for different values...

article

Fluorescent Probes: Spatiotemporally Tracking the Programmable Mitochondrial Membrane Potential Evolutions by a Robust Molecular Rotor (Small 40/2019)

Kaiyue Tan, Yingying Chen, Kang Ma, Qing Wang, more

Small > 15 > 40 > n/a - n/a

In article number 1903266, Fuan Wang and co‐workers construct a mitochondria‐specific lighting up fluorescent Mito‐Cy, that is capable of spatiotemporally tracking the programmable mitochondrial membrane potential (MMP) evolutions in live cells, thus holding great promise for illustrating mitochondria‐involved pathophysiological pathways.

article

Spatiotemporally Tracking the Programmable Mitochondrial Membrane Potential Evolutions by a Robust Molecular Rotor

Kaiyue Tan, Yingying Chen, Kang Ma, Qing Wang, more

Small > 15 > 40 > n/a - n/a

Mitochondrial membrane potential (MMP) represents an essential parameter of cellular activities, and even a minute MMP variation could significantly affect the biological functions of living organisms. Thus, convenient and accurate MMP detection is highly desirable since conventional MMP probes are always constrained by photobleaching, inconvenience, and irreversibility. Herein, a spatial‐dependent...

article

A ratiometric fluorescent nanoprobe consisting of ssDNA-templated silver nanoclusters for detection of histidine/cysteine, and the construction of combinatorial logic circuits

Xiaodong Lin, Zhe Hao, Haotian Wu, Minyang Zhao, more

Microchimica Acta > 2019 > 186 > 9 > 1-8

A ratiometric fluorescent nanoprobe consisting of ssDNA-templated silver nanoclusters (DNA-AgNCs) as dual fluorophore has been constructed for highly sensitive and selective detection of cystein (Cys) and histidine (His). The DNA-AgNCs displays dual emission in that photoexcitation at 470 nm results in weak-green fluorescence peaking at 560 nm, while excitation at 550 nm gives strong red fluorescence...

article

An alternative method for implementation of frequency-encoded logic gates using a terahertz optical asymmetric demultiplexer (TOAD)

K. Maji, K. Mukherjee, A. Raja

Journal of Computational Electronics > 2019 > 18 > 4 > 1423-1434

All-optical frequency-encoded AND, OR, and NOT logic gates are proposed and their performance simulated to confirm their feasibility. Terahertz optical asymmetric demultiplexer (TOAD)-based logic gates with a control pulse energy as low as 50 fJ are used, and real-time simulations of their input and output pulse patterns reveal a rate of 20 Gbps. Such logic gates could be used for future all-optical...

article

Memristor Based Full Adder Circuit for Better Performance

Muhammad Khalid, Sana Mukhtar, Mohammad Jawaid Siddique, Sumair Faisal Ahmed

Transactions on Electrical and Electronic Materials > 2019 > 20 > 5 > 403-410

In this paper, we have designed memristor based AND, OR, and exclusive-OR (XOR) gates. With the help of these gates, memristor based full adder circuit has proposed. Simulation results of the proposed circuit including all above gates have been reported. Prominent improvement of the proposed circuit has been represented in power consumption 54.74%, delay 14.84%, and lesser transistor count with respect...

article

Phonon‐Assisted Electro‐Optical Switches and Logic Gates Based on Semiconductor Nanostructures

Zhengping Shan, Xuelu Hu, Xiao Wang, Qin Tan, more

Advanced Materials > 31 > 33 > n/a - n/a

High‐performance nanostructured electro‐optical switches and logic gates are highly desirable as essential building blocks in integrated photonics. In contrast to silicon‐based optoelectronic devices, with their inherent indirect optical bandgap, weak light‐modulation mechanism, and sophisticated device configuration, direct‐bandgap‐semiconductor nanostructures with attractive electro‐optical properties...

article

Frontispiece: Two‐Photon‐Induced CO‐Releasing Molecules as Molecular Logic Systems in Solution, Polymers, and Cells

Vadde Ramu, Gandra Upendar Reddy, Jingjing Liu, Patrick Hoffmann, more

Chemistry – A European Journal > 25 > 36 > n/a - n/a

Two‐photon excitation with NIR light (800 nm)‐induced CO‐release from two Mn^I‐tricarbonyl complexes bearing 1,8‐naphthalimide units is reported in this work. One of the complexes obtained behaves as a logic OR gate in solution, nonwovens, and in HeLa cells. CO release, indicated by fluorescence enhancement, was detected in solution, nonwoven, and HeLa cells by single‐ (405 nm) and two‐photon (800...

article

Two‐Photon‐Induced CO‐Releasing Molecules as Molecular Logic Systems in Solution, Polymers, and Cells

Vadde Ramu, Gandra Upendar Reddy, Jingjing Liu, Patrick Hoffmann, more

Chemistry – A European Journal > 25 > 36 > 8453 - 8458

Phototherapeutic applications of carbon monoxide (CO)‐releasing molecules are limited because they require harmful UV and blue light for activation. We describe two‐photon excitation with NIR light (800 nm)‐induced CO‐release from two Mn^I tricarbonyl complexes bearing 1,8‐naphthalimide units (1, 2). Complex 2 behaves as a logic OR gate in solution, nonwovens, and in HeLa cells. CO release, indicated...

article

Application of nonlinear photonic crystal ring resonators in realizing all optical OR/NOT/AND gates

Mohammad Reza Geraili, Seyed Ebrahim Hosseini, Mohammad Bagher Tavakoli, Mehrdad Shokooh-Saremi

Optical and Quantum Electronics > 2019 > 51 > 7 > 1-13

Arithmetic logic unit (ALU) is the core of any digital processing systems. For creating an all optical ALU one needs basic logic gates such as optical NOT, OR and AND gates along with an optical full adder and optical multiplexer. In this paper we aim to design and propose these three basic logic gates using nonlinear photonic crystal ring resonators. The simulations will be done using plane wave...

article

An Improved Design of n-Bit Universal Reversible Gate Library

Mohamed Osman, Ahmed Younes, Galal Ismail, Roushdy Farouk

International Journal of Theoretical Physics > 2019 > 58 > 8 > 2531-2549

Reversible logic has been considered as an important solution to the power dissipation problem in the existing electronic devices. Many universal reversible libraries that include more than one type of gates have been proposed in the literature. This paper proposes a novel reversible n-bit gate that is proved to be universal for synthesizing reversible circuits. Reducing the reversible circuit synthesis...

article

Versatile and Homogeneous DNA Tetraplex Platform for Constructing Label‐Free Logic Devices: From Design to Application

Dan Huang, Chunrong Yang, Ye Yao, Jicheng Li, more

Chemistry – A European Journal > 25 > 28 > 6996 - 7003

The design of DNA‐based logic circuits has become an active research field in DNA nanotechnology and holds great potential in intelligent bioanalysis. To date, although many DNA‐based logic systems have been realized, the implementation of advanced logic functions is still challenging, especially with simple and homogeneous compositions. Herein, by integrating two DNA tetraplex structures (G‐quadruplex...

article

A smartphone‐based augmented reality system for university students for learning digital electronics

Carlos Avilés‐Cruz, Juan Villegas‐Cortez

Computer Applications in Engineering Education > 27 > 3 > 615 - 630

The fundamental concepts of electronic devices are generally taught in the initial courses of electrical and electronics engineering. For students, it is very important to grasp the basic concepts that make computers and digital systems possible. Among these concepts, boolean algebra and logic gates stand out. In this paper, a smartphone‐based augmented reality (AR) system is proposed which helps...

article

Ultrafast all-optical digital comparator using quantum-dot semiconductor optical amplifiers

K. Komatsu, G. Hosoya, H. Yashima

Optical and Quantum Electronics > 2019 > 51 > 2 > 1-16

In this investigation, three types of 160 Gb/s all-optical digital comparators using quantum-dot semiconductor optical amplifiers (QD-SOAs) are constructed. These configurations have different combination patterns of logic gates and QD-SOAs. Based on numerical simulations, we investigate and evaluate the performance of the devices in terms of the number of logic gates and QD-SOAs, and the value of...

article

Oxidation‐Responsive Materials: Biological Rationale, State of the Art, Multiple Responsiveness, and Open Issues

Farah El‐Mohtadi, Richard d'Arcy, Nicola Tirelli

Macromolecular Rapid Communications > 40 > 1 > n/a - n/a

In this review, a general introduction to biological oxidants (focusing on reactive oxygen species, ROS) and the biomedical rationale behind the development of materials capable of responding to ROS is provided. The state of the art for preparative aspects and mechanistic responses of the most commonly used macromolecular ROS‐responsive systems, including polysulfides, polyselenides, polythioketals,...

article

Logic gates based on electrically driven nanoelectromechanical switches

Nguyen Van Toan, Dong Zhao, Naoki Inomata, Takahito Ono

IEEJ Transactions on Electrical and Electronic Engineering > 14 > 2 > 335 - 336

This letter reports the design, fabrication, and evaluation of logic gates including NAND and NOR gates which are composed of electrically driven nanoelectromechanical (NEM) switches. These logic gates are formed by four NEM switches consisting of four cantilevers, two input ports, two source ports, and an output. Devices are successfully fabricated by a combination of electron beam lithography, deep...

article

A Novel Reconfigurable Sub-0.25-V Digital Logic Family Using the Electron-Hole Bilayer TFET

Cem Alper, Jose Luis Padilla, Pierpaolo Palestri, Adrian M. Ionescu

IEEE Journal of the Electron Devices Society > 2018 > 6 > 1 > 2 - 7

We propose and validate a novel design methodology for logic circuits that exploits the conduction mechanism and the presence of two independently biased gates (“n-gate” and “p-gate”) of the electron-hole bilayer tunnel field-effect transistor (EHBTFET). If the device is designed to conduct only under certain conditions, e.g., when

$V_{\mathrm {n-gate}} = V_{\mathrm {DD}}$

and

$V_{\mathrm {p-gate}} = 0$

...

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Search results

Logic‐Gate‐Actuated DNA‐Controlled Receptor Assembly for the Programmable Modulation of Cellular Signal Transduction

Photosensitive Complementary Inverters Based on n‐Channel MoS₂ and p‐Channel MoTe₂ Transistors for Light‐to‐Frequency Conversion Circuits

Charged Metal Nanoparticles for Chemoelectronic Circuits

A design procedure for fan-out improvement in all-optical photonic crystal logic design

Fluorescent Probes: Spatiotemporally Tracking the Programmable Mitochondrial Membrane Potential Evolutions by a Robust Molecular Rotor (Small 40/2019)

Spatiotemporally Tracking the Programmable Mitochondrial Membrane Potential Evolutions by a Robust Molecular Rotor

A ratiometric fluorescent nanoprobe consisting of ssDNA-templated silver nanoclusters for detection of histidine/cysteine, and the construction of combinatorial logic circuits

An alternative method for implementation of frequency-encoded logic gates using a terahertz optical asymmetric demultiplexer (TOAD)

Memristor Based Full Adder Circuit for Better Performance

Phonon‐Assisted Electro‐Optical Switches and Logic Gates Based on Semiconductor Nanostructures

Frontispiece: Two‐Photon‐Induced CO‐Releasing Molecules as Molecular Logic Systems in Solution, Polymers, and Cells

Two‐Photon‐Induced CO‐Releasing Molecules as Molecular Logic Systems in Solution, Polymers, and Cells

Application of nonlinear photonic crystal ring resonators in realizing all optical OR/NOT/AND gates

An Improved Design of n-Bit Universal Reversible Gate Library

Versatile and Homogeneous DNA Tetraplex Platform for Constructing Label‐Free Logic Devices: From Design to Application

A smartphone‐based augmented reality system for university students for learning digital electronics

Ultrafast all-optical digital comparator using quantum-dot semiconductor optical amplifiers

Oxidation‐Responsive Materials: Biological Rationale, State of the Art, Multiple Responsiveness, and Open Issues

Logic gates based on electrically driven nanoelectromechanical switches

A Novel Reconfigurable Sub-0.25-V Digital Logic Family Using the Electron-Hole Bilayer TFET

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