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Progression in the Oxidation Stability of MXenes
HighlightsThe progression of MXene's oxidation stability, the techniques available to monitor the phenomenon as well as the variables that contribute to its oxidation rate are discussed.Comprehensive aspects of the oxidation process in various storage settings and the debated oxidation mechanism along with the most effective antioxidation strategies are addressed in conjunction with current challenges to the air stability of MXenes.MXenes are under the spotlight due to their versatile physicochemical characteristics. Since their discovery in 2011, significant advancements have been achieved in their synthesis and application sectors. However, the spontaneous oxidation of MXenes, which is critical to its processing and product lifespan, has gotten less attention due to its chemical complexity and poorly understood oxidation mechanism. This perspective focuses on the oxidation stability of MXenes and addresses the most recent advancements in understanding and the possible countermeasures to limit the spontaneous oxidation of MXenes. A section is dedicated to the presently accessible methods for monitoring oxidation, with a discussion on the debatable oxidation mechanism and coherently operating factors that contribute to the complexity of MXenes oxidation. The current potential solutions for mitigating MXenes oxidation and the existing challenges are also discussed with prospects to prolong MXene’s shelf-life storage and expand their application scope.
Journal Article
Made modern : science and technology in Canadian history
Science and technology have shaped not only economic empires and industrial landscapes, but also the identities, anxieties, and understandings of people living in modern times. Made Modern: Science and Technology in Canadian History draws together leading scholars from a wide range of fields to enrich our understanding of history inside and outside Canada's borders. The book's chapters examine how science and technology have allowed Canadians to imagine and reinvent themselves as modern. Focusing on topics including exploration, scientific rationality, the occult, medical instruments, patents, communication, and infrastructure, the contributors situate Canadian scientific and technological developments within larger national and transnational contexts. The first major collection of its kind in thirty years, Made Modern explores the place of science and technology in shaping Canadians' experience of themselves and their place in the modern world.-- Source other than Library of Congress.
Book
Nanoparticles for Cancer Therapy: Current Progress and Challenges
Cancer is one of the leading causes of death and morbidity with a complex pathophysiology. Traditional cancer therapies include chemotherapy, radiation therapy, targeted therapy, and immunotherapy. However, limitations such as lack of specificity, cytotoxicity, and multi-drug resistance pose a substantial challenge for favorable cancer treatment. The advent of nanotechnology has revolutionized the arena of cancer diagnosis and treatment. Nanoparticles (1–100 nm) can be used to treat cancer due to their specific advantages such as biocompatibility, reduced toxicity, more excellent stability, enhanced permeability and retention effect, and precise targeting. Nanoparticles are classified into several main categories. The nanoparticle drug delivery system is particular and utilizes tumor and tumor environment characteristics. Nanoparticles not only solve the limitations of conventional cancer treatment but also overcome multidrug resistance. Additionally, as new multidrug resistance mechanisms are unraveled and studied, nanoparticles are being investigated more vigorously. Various therapeutic implications of nanoformulations have created brand new perspectives for cancer treatment. However, most of the research is limited to in vivo and in vitro studies, and the number of approved nanodrugs has not much amplified over the years. This review discusses numerous types of nanoparticles, targeting mechanisms, and approved nanotherapeutics for oncological implications in cancer treatment. Further, we also summarize the current perspective, advantages, and challenges in clinical translation.
Journal Article
Singularities : technoculture, transhumanism, and science fiction in the twenty-first century
\"In a time of protracted economic crisis, failing political systems, and impending environmental collapse, one strand in our collective cultural myth of Progress--the technological--remains vibrantly intact, surging into the future at ramming speed. Amid the seemingly exponential proliferation of machine intelligence and network connectivity, and the increasingly portentous implications of emerging nanotechnology, futurists and fabulists look to an imminent historical threshold whereupon the nature of human existence will be radically and irrevocably transformed. The Singularity, it is supposed, can be no more than a few years off; indeed, some believe it has already begun. Technological Singularity--a trope conceived in science fiction and subsequently adopted throughout technocultural discourse and beyond--is the primary site of interpenetration between technoscientific and science-fictional figurations of the future, a territory where longstanding binary oppositions between science and fiction, and between present and future, are rapidly dissolving. In this groundbreaking volume, the first to mount a sustained and wide-ranging critical treatment of Singularity as a subject for theory and cultural studies, Raulerson draws SF texts into a complex dialogue with contemporary digital culture, transhumanist movements, political and economic theory, consumer gadgetry, gaming, and related vectors of high-tech postmodernity. In theorizing Singularity as a metaphorical construct lending shape to a range of millennial anxieties and aspirations, Singularities also makes the case for a recent and little-understood subgeneric formation--postcyberpunk SF--as a cohesive body of work, engaged in a shared literary project that is simultaneously shaping, and shaped by, purportedly nonfictional technoscientific discourses\"--Publisher.
Book
Zinc Anode for Mild Aqueous Zinc-Ion Batteries: Challenges, Strategies, and Perspectives
HighlightsThis article mainly summarizes the challenges and the latest research progress of highly reversible zinc anodes in mild aqueous zinc-ion batteries and proposes corresponding recommendations.The rapid advance of mild aqueous zinc-ion batteries (ZIBs) is driving the development of the energy storage system market. But the thorny issues of Zn anodes, mainly including dendrite growth, hydrogen evolution, and corrosion, severely reduce the performance of ZIBs. To commercialize ZIBs, researchers must overcome formidable challenges. Research about mild aqueous ZIBs is still developing. Various technical and scientific obstacles to designing Zn anodes with high stripping efficiency and long cycling life have not been resolved. Moreover, the performance of Zn anodes is a complex scientific issue determined by various parameters, most of which are often ignored, failing to achieve the maximum performance of the cell. This review proposes a comprehensive overview of existing Zn anode issues and the corresponding strategies, frontiers, and development trends to deeply comprehend the essence and inner connection of degradation mechanism and performance. First, the formation mechanism of dendrite growth, hydrogen evolution, corrosion, and their influence on the anode are analyzed. Furthermore, various strategies for constructing stable Zn anodes are summarized and discussed in detail from multiple perspectives. These strategies are mainly divided into interface modification, structural anode, alloying anode, intercalation anode, liquid electrolyte, non-liquid electrolyte, separator design, and other strategies. Finally, research directions and prospects are put forward for Zn anodes. This contribution highlights the latest developments and provides new insights into the advanced Zn anode for future research.
Journal Article
Technology and cultural tectonics : shifting values and meanings
\"What impact has technology had on cultural meanings, values, and symbols? This anthropological exploration shows how technologies produce novel and sometimes jarring realignments among cultural institutions. Contemporary reproductive, medical, genetic, and information technologies forge unprecedented family relationships, produce a new mode of thinking based on the confluence of artificial and human intelligence, and reconfigure conventional scales of time and space. Taken together, they redefine what it is to be human\"-- Provided by publisher.
Book
Papers and patents are becoming less disruptive over time
Theories of scientific and technological change view discovery and invention as endogenous processes
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, wherein previous accumulated knowledge enables future progress by allowing researchers to, in Newton’s words, ‘stand on the shoulders of giants’
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. Recent decades have witnessed exponential growth in the volume of new scientific and technological knowledge, thereby creating conditions that should be ripe for major advances
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. Yet contrary to this view, studies suggest that progress is slowing in several major fields
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. Here, we analyse these claims at scale across six decades, using data on 45 million papers and 3.9 million patents from six large-scale datasets, together with a new quantitative metric—the CD index
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—that characterizes how papers and patents change networks of citations in science and technology. We find that papers and patents are increasingly less likely to break with the past in ways that push science and technology in new directions. This pattern holds universally across fields and is robust across multiple different citation- and text-based metrics
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. Subsequently, we link this decline in disruptiveness to a narrowing in the use of previous knowledge, allowing us to reconcile the patterns we observe with the ‘shoulders of giants’ view. We find that the observed declines are unlikely to be driven by changes in the quality of published science, citation practices or field-specific factors. Overall, our results suggest that slowing rates of disruption may reflect a fundamental shift in the nature of science and technology.
A decline in disruptive science and technology over time is reported, representing a substantive shift in science and technology, which is attributed in part to the reliance on a narrower set of existing knowledge.
Journal Article
A Review of Actuation and Sensing Mechanisms in MEMS-Based Sensor Devices
Over the last couple of decades, the advancement in Microelectromechanical System (MEMS) devices is highly demanded for integrating the economically miniaturized sensors with fabricating technology. A sensor is a system that detects and responds to multiple physical inputs and converting them into analogue or digital forms. The sensor transforms these variations into a form which can be utilized as a marker to monitor the device variable. MEMS exhibits excellent feasibility in miniaturization sensors due to its small dimension, low power consumption, superior performance, and, batch-fabrication. This article presents the recent developments in standard actuation and sensing mechanisms that can serve MEMS-based devices, which is expected to revolutionize almost many product categories in the current era. The featured principles of actuating, sensing mechanisms and real-life applications have also been discussed. Proper understanding of the actuating and sensing mechanisms for the MEMS-based devices can play a vital role in effective selection for novel and complex application design.
Journal Article