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相关概念视频

P-N junction01:11

P-N junction

531
A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
531
UV–Vis Spectrometers01:14

UV–Vis Spectrometers

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The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell.
1.3K
Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

219
Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy  (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used....
219
Gas Chromatography: Types of Detectors-II01:19

Gas Chromatography: Types of Detectors-II

371
In gas chromatography, different detectors are employed to meet specific analytical needs. These detectors are often categorized based on their detection mechanisms and the types of compounds they are best suited to analyze. Thermal Conductivity Detectors (TCD), Flame Ionization Detectors (FID), and Electron Capture Detectors (ECD) represent common categories, each with unique operating principles and applications. However, beyond these, several other detectors are designed for more specialized...
371
Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

391
The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
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相关实验视频

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High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
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单个像素的p级-n连接谱仪.

Jingyi Wang1,2, Beibei Pan1,2, Zi Wang1,3,4

  • 1School of Information Science and Technology, ShanghaiTech University, Shanghai, PR China.

Nature communications
|February 27, 2024
PubMed
概括
此摘要是机器生成的。

我们使用一种新的神经光谱场 (NSF) 方法开发了一种超紧的光谱仪. 这种单像素设备为生物医学分析和环境监测等多种应用提供了高精度和高分辨率.

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科学领域:

  • 光电学是指光电子产品.
  • 频谱学是一种光谱学.
  • 材料科学 材料科学 材料科学

背景情况:

  • 超紧的光谱仪对于便携式分析设备至关重要.
  • 现有的技术面临着尺寸,成本或性能方面的限制.
  • 在生物医学分析,环境监测和食品安全等领域需要小型化光谱仪.

研究的目的:

  • 报告一个新的单像素光探测器光谱仪.
  • 引入神经光谱场 (NSF) 方法用于光谱重建.
  • 为了证明设备的性能和商业化潜力.

主要方法:

  • 使用了AlGaAs/GaAs p级-n连接器,用于电压调节的光学响应.
  • 开发了利用波长和偏差依赖响应的神经光谱场 (NSF) 方法.
  • 使用单像素光电探测器来获取光谱数据.

主要成果:

  • 达到从480nm到820nm的光谱范围.
  • 已证明高光谱波长准确度高达0.30nm.
  • 获得了高达10nm的光谱分辨率.
  • 展示了高光谱成像性能.

结论:

  • 开发的光谱仪非常紧,非常准确.
  • 该NSF方法有效地从单像素数据重建光学光谱.
  • 与标准III-V工艺的兼容性促进了微型光谱仪的商业化.