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The research team discovered natural graphene in lunar soil samples

The research team discovered natural graphene in lunar soil samples

The reporter learned from Jilin University that Zou Meng, Professor Zhang Wei, Senior Engineer Li Xiujuan, and Ren Wenchai, a researcher at the Institute of Metal Research of the Chinese Academy of Sciences, discovered naturally formed graphene through observation and analysis of Chang'e-5 drilling debris lunar soil. This breakthrough discovery is the first in the world.

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2024

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06

The latest Nature from Jiaotong University! Significant discoveries in graphene superconductivity

The latest Nature from Jiaotong University! Significant discoveries in graphene superconductivity

Recently, the Li Tingxin research group from the School of Physics and Astronomy at Shanghai Jiao Tong University and the Liu Xiaoxue research group from the Li Zhengdao Research Institute published a research paper titled "Tunable superconductivity in electric - and hole doped Bernal bilayer graphene" in Nature. This study is the first to observe the superconducting properties of electron doping in single crystal graphene, which is of great significance for understanding the superconducting mechanisms of crystalline graphene and angle graphene systems, designing and preparing high-quality new superconducting quantum devices based on graphene systems, and so on.

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2024

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06

Graphene from "commoners" to "nobles"

Graphene from "commoners" to "nobles"

From the initial extraction of graphite raw materials, to deep processing into lithium-ion battery negative electrode materials, and then to new energy materials - graphene, with the deep processing and development of our province's graphite resource industry, graphene's value has doubled. Graphene industry may become a new driving force for economic transformation in our province

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2024

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06

The form, properties, and applications of graphene

The form, properties, and applications of graphene

Today's graphene market. Graphene was first separated as a separate carbon layer in 2004, and now there are approximately 200 suppliers worldwide who commercially supply it in the form of additive powders, aqueous solutions, and flakes.

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2024

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06

How was the world's first functional graphene semiconductor developed

How was the world's first functional graphene semiconductor developed

As silicon material chips gradually approach the physical limit of 2nm, the global demand for chips based on high-quality semiconductor materials is increasing dramatically. Two dimensional materials, due to their excellent electronic transmission characteristics and potential high integration, have become a new avenue for scientists and semiconductor companies from various countries to invest in. Graphene, as the first two-dimensional material found to exist stably at room temperature, has been attempted by scientists since its discovery in 2004 to combine with other materials and design a new type of chip that consumes less energy and operates faster than existing semiconductors. However, the unique structure of graphene leads to a "zero bandgap" characteristic, which is the biggest obstacle to the application of graphene in the semiconductor field. Recently, nanoscientists from Tianjin University in China and Georgia Institute of Technology in the United States have developed the world's first functional graphene semiconductor, making it possible to overcome this challenge. "In a sense, this is a leap for people from silicon chips to carbon chips," Professor Ma Lei from Tianjin University, who led the research, told Global Times reporters.

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2024

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06

What is the working life of SMT resistors?

What is the working life of SMT resistors?

It is difficult to determine the service life of electronic components, and there is no correct service life. Only by judging the corresponding factors can the working life of SMT resistors be long.

04

2018

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12

What are the four main components of SMT resistors

What are the four main components of SMT resistors

The substrate material is generally 96% aluminum oxide ceramic. In addition to good electrical insulation, the substrate should also have excellent thermal conductivity at high temperatures. Characteristics such as electrical performance and mechanical strength. In addition, it is required that the substrate is flat and the marking is accurate. Standard to fully ensure resistance. The electrode paste is printed in place.

04

2018

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12

Basic Introduction to SMT Transistors

Basic Introduction to SMT Transistors

The basic structure of a transistor is two PN interfaces connected in reverse, and the SMT transistor data indicates that there can be two combinations: PNP and NPN. The three connected endpoints are sequentially referred to as emitters (E) and (collector, C), and the source of SMT transistor data names is related to their functions during transistor operation. It also displays the circuit symbols of NPN and PNP transistors, with the emitter specially marked and the arrow indicating an n-type semiconductor, consistent with the symbol of the diode. When no external bias is applied, both pn interfaces will form depletion zones, separating the neutral p-type and n-type regions.

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2018

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