Efficient Photothermal Conversion for Oxidation Removal of Formaldehyde using an rGO-CeO2 Modified Nickel Foam Monolithic Catalyst

Power density has grown to be the dominant challenge for continued complementary metal-oxide-semiconductor (CMOS) technology scaling. Together with recent improvements in microrelay design and process technology, this has led to renewed interest in mechanical computing for ultralow-power integrated circuit (IC) applications. This paper provides a brief history of mechanical computing followed by an overview of the various types of micromechanical switches, with particular emphasis on electromechanical relays since they are among the most promising for IC applications. Relay reliability and process integration challenges are discussed. Demonstrations of functional relay logic circuits are then presented, and relay scaling for improved device density and performance is described. Finally, the energy efficiency benefit of a scaled relay technology versus a CMOS technology with comparable minimum dimensions is assessed.

Mechanical computing redux: relays for integrated circuit applications (特集 「ポスト・ムーアの法則」時代におけるエレクトロニクス産業)

In today's context of carbon-neutral carbon peaking and uneven distribution of global fossil energy, future-oriented artificial photosynthesis may become the key to solving the problem, and the realization of photothermal coupling catalytic one-step reduction of CO2 and H2O to renewable synthetic fuels is a more critical step in the selection and design of catalysts and the study of the reaction mechanism. Among them, TiO2 is widely used in the photothermal reduction of CO2 because of its excellent photothermal chemical properties. However, the photothermal catalytic mechanism of TiO2 is not clear at present, and there is a lack of effective modification to enhance the catalytic activity. In this study, TiO2 nanoribbon materials with an anatase phase were synthesized by hydrothermal modification of TiO2 carriers, and the doping of metal Bi was carried out by various methods on this basis. The performance and selectivity of the modified TiO2 catalysts were evaluated by photothermal catalytic reduction of CO2 and H2O, while the physicochemical properties and photochemistry were determined by XRD, Raman, BET, SEM, EDS mapping, TEM, XPS, UV–vis DRS, PL, TR-PL, CO2-TPD, and in situ DRFITS. The catalysts were analyzed by in situ characterization techniques to reveal the effects of carrier modification, semiconductor compounding, metal loading, and doping on the catalytic performance, physicochemical properties, and photothermal properties of the catalysts and then to explain the mechanism of CO2 catalytic reduction, which provides theoretical guidance and data support to improve the selection and design of catalysts. 

Study on the Effect of Bi Metal-Doped TiO2 on the Performance of Photothermal Catalytic Reduction of CO2 to Renewable Synthetic Fuels

Insights into non-crystalline structure of solid solution Ce-Mn co-oxide nanofibers for efficient low-temperature toluene oxidation

Ternary content addressable memory (TCAM) is one type of associative memory and has been widely used in caches, routers, and many other mapping-aware applications. While the conventional SRAM-based TCAM is high speed and bulky, there have been denser but slower and less reliable nonvolatile TCAMs using nonvolatile memory (NVM) devices. Meanwhile, some CMOS TCAMs using dynamic memories have been also proposed. Although dynamic TCAM could be denser than the 16T SRAM TCAM and more reliable than the nonvolatile TCAMs, CMOS dynamic TCAMs still suffer from the row-by-row refresh energy and time overheads. In this article, we propose dynamic TCAM using nanoelectromechanical (NEM) relays (DyTAN), and utilize one-shot refresh (OSR) to solve the memory refresh problem. By exploiting the unique NEM relay characteristics, DyTAN outperforms the existing works in the balance between density, speed, and power efficiency. Compared with the 16T SRAM-based TCAM, the 5T CMOS dynamic TCAM, the 2T2R TCAM, and the 2FeFET TCAM, evaluations show that the proposed DyTAN reduces the write energy by up to $2.3\times $ , $1.3\times $ , $131\times $ , and $13.5\times $ , and improves the search energy-delay-product (EDP) by up to $12.7\times $ , $1.7\times $ , $1.3\times $ , and $2.8\times $ , respectively.

DyTAN: Dynamic Ternary Content Addressable Memory Using Nanoelectromechanical Relays

This brief presents the concept of one-shot refresh (OSR) for dynamic memories. The uniqueness of OSR that differs from the conventional row-by-row refresh operations, is that OSR is able to refresh all rows in the entire array by just one single refresh without the need to read out the stored data in each row. By doing so, significant energy savings could be achieved, and the time window accessible for regular read and write operations is widened with less disruption by the refresh traffic. We show that a few devices could be used to update existing designs to gain the OSR capability. These devices all exhibit hysteretic I-V characteristics and support the OSR data-independent refresh without the need to read out data first. The enabler is the proposed circuit technique for refresh and standby. As a proof of concept, we showcase an OSR-enabled embedded dynamic random-access memory (eDRAM) using the nano-electromechanical (NEM) relay, a type of CMOS-compatible device. Comparative evaluations show the merits of OSR more thoroughly.

One-Shot Refresh: A Low-Power Low-Congestion Approach for Dynamic Memories

A series of CuMnOx/CeO2/cordierite and CuMnCeOx/cordierite catalysts prepared by a complex method with citric acid were investigated for the performance of chlorobenzene (CB) oxidation. The effects of the molar ratio of Mn/Cu, transition metal oxide loading, calcination temperature and time were investigated as the main investigation factor for the performance. Meanwhile, XRD, SEM, BET, H2-TPR, O2-TPD and XPS were conducted to characterize the physicochemical properties of these catalysts. The results demonstrated that CuMnOx/CeO2/cordierite catalysts prepared by step-by-step synthesis with the Cu/Mn molar ratio of 5:2 exhibited a high activity (T90 = 350 °C), owing to the incorporation of CuO and MnOx for forming CuMn2O4 spinel oxide supported on CeO2 surface. More importantly, CuMnCeOx/cordierite catalysts prepared by one-step exhibited the highest oxidation activity (T90 < 300 °C) attributed to the low H2 reduction temperature and desorption energy of surface oxygen, and the formed Cu-Mn-O-Ce solid solution and CeO2 promoted the high dispersion of CuMnOx in the supported catalysts. In addition, the possible oxidation mechanism was described to demonstrate the by-products generation and oxygen transfer of CuMnCeOx catalysts. 

/pdf/improved-activity-and-stability-for-chlorobenzene-oxidation-3jl7tvmq.pdf

Improved activity and stability for chlorobenzene oxidation over ternary Cu-Mn–O-Ce solid solution supported on cordierite

This paper proposes low-power design of embedded dynamic random-access memory (eDRAM) using emerging nanoelectromechanical (NEM) relay devices. The motivation of this work is to reduce the standby refresh power consumption through the improvement of retention time of eDRAM cells. In this paper, it is revealed that the tunable beyond-CMOS characteristics of emerging NEM relay devices, especially the ultra-high OFF-state drain-source resistance, open up new opportunities with device-circuit co-design. In addition, the pull- in and pull-out threshold voltages are tilled to fit the operating mechanisms of eDRAM, so as to support low-voltage operations along with long retention time. Excitingly, when low-gate-leakage thick-gate transistors are used together, the proposed NEM-relay- based eDRAM exhibits so significant retention time improvement that it behaves almost "nonvolatile". Even if using thin-gate transistors in a 130nm CMOS, the evaluation of the proposed eDRAM shows up to 63x and 127x retention time improvement at 1.0V and 1.4V supply, respectively. Detailed performance benchmarking analysis, along with the practical CMOS- compatible NEM relay model, the eDRAM design and optimization considerations, is included in this paper.

Design of almost-nonvolatile embedded DRAM using nanoelectromechanical relay devices

Synergistic effect of photo-thermal oxidation for a low concentration of HCHO over Bi3+-TiO2/MnFeOx catalysts at ambient temperature

This paper first presents a review of the circuit topologies of recently emerged symmetric memories that support 2-dimensional row-wise and column-wise accesses of read and write operations. Supporting technologies include CMOS, ferroelectric FET (FeFET) and two-terminal resistive memory devices. This paper will reveal how the emerging memory feature of access flexibility could enable new computing paradigms by providing fundamental savings of memory access times with column-wise memory access support. This benefit exists in both conventional applications and emerging computing, such as in-memory database and neural networks. In addition, this paper also proposes 2T1R, a new symmetric memory circuit design based on two-terminal resistive devices, such as RRAM and MTJ. This new design exhibits improved leakage power and scaling capability, as compared with the existing RRAM-based crossbar symmetric memory design.

Enabling New Computing Paradigms with Emerging Symmetric-Access Memories

Handle everyday research tasks with reliable, citation-backed results

Your personal Research Agent to handle research tasks with citation-backed results

Popular Tasks used by Researchers

How can I help with your research?

Meet SciSpace

Get more enhanced response by uploading the PDFs you want me to reference.

No relevant PDFs in your library

SciSpace is the AI research assistant for academics. Run systematic literature reviews on 280M+ papers, and write papers with cited sources. Trusted by 1M+ students, PhDs & researchers.

SciSpace | AI for Research

Analyze PDFs

Code & Manuscripts

Funding & Grants

Literature & Patents

Medical & Clinical Data

Systematic Review

Visualize & Present

Web & Data

Build a Google Scholar-like website for your research.

Build a website

Create charts and images for your research

Create a Chart

Write a paper for submission to a journal

Draft a manuscript

Patent Search

Design eye-catching scientific posters in minutes.

Scientific Poster Generation

Systematic Literature Review

One task is running at the moment. Your messages will be shown right after.

Drag and drop or click here to browse

Loved by <highlight>1 million+</highlight> researchers

Extract a list of specific topics and their sources from unstructured text

Topics

Compare and analyze relevant papers that matches with your search

Papers

Get insights from PDFs and bookmarked papers from your library

My library

Recent searches

Try searching for:

Catch AI-generated content in scholarly and non-scholarly content

{ai} Detector

Ai Writer

Get PDF Summaries, highlighted text explanations 

Chat with PDF

Effortlessly create in-text citations and bibliographies in APA and 2,500 other formats

Citation generator

Get explanations, summaries, and answers on academic papers

Ease up your research workflow with {scispace}'s cohort of exciting AI tools

Elevate your academic writing skills and convey your ideas the way you want

Paraphraser

Explore our range of reading and writing tools

Your file is being prepared and should be ready in a few minutes. If it's a large file, it might take a bit longer. You can close this window, and we'll email you the file when it's done.

You have reached a maximum limit of <strong>{limit}</strong> columns in the table. Remove at least <strong>1</strong> column to add or create another one.

Mingyang Gu

Author Tools

Chat about Author