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For a system of charges, it is easy to calculate the system's potential because potential is a scalar quantity. However, in some instances where calculating the electric field is more straightforward than finding the potential, the electric field is used to calculate the system's potential. For a positive charge, the electric field is radially outward, and the potential is positive at any finite distance from the positive charge. In such an electric field, the motion away from the...
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The electric field and electric potential are related to each other. If the electric field at various points in the region of interest is known, it can be used to calculate the electric potential difference between any two points. Similarly, if the electric potential is known for various points, then it is possible to calculate the electric field.
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In electrical engineering, the analysis of networks composed of passive linear components — resistors (R), capacitors (C), and inductors (L) — is fundamental. These components are organized into circuits where the relationship between input and output can be analyzed using transfer functions. The transfer function of an RLC circuit, which relates the voltage across a capacitor to the input voltage, can be derived using Kirchhoff's laws.
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Electrically-triggered micro-explosion in a graphene/SiO2/Si structure.

Siyang Liu1, Myungji Kim1, Hong Koo Kim2

  • 1Department of Electrical and Computer Engineering and Petersen Institute of NanoScience and Engineering, 1238 Benedum, University of Pittsburgh, Pittsburgh, PA, 15261, USA.

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|May 11, 2018
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Summary
This summary is machine-generated.

Electrically induced micro-explosions in graphene/SiO2/Si structures fragment analytes for chip-scale atomic emission spectroscopy. Damage patterns differ based on silicon type, guiding optimization for sensitive, low-voltage analysis.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Spectroscopy

Background:

  • Metal-insulator-semiconductor (MIS) structures enable electrically triggered micro-explosions for analyte fragmentation.
  • Chip-scale atomic emission spectroscopy (AES) requires efficient atomization methods.

Purpose of the Study:

  • Investigate micro-explosion mechanisms in graphene/SiO2/Si (GOS) structures.
  • Understand damage morphology differences between n-Si and p-Si substrates.
  • Optimize GOS structures for chip-scale AES.

Main Methods:

  • Fabrication of graphene/SiO2/Si (GOS) structures.
  • Application of high-field pulsed voltage drive under inversion and accumulation bias.
  • Analysis of micro-explosion damage morphology using microscopy.

Main Results:

  • Micro-explosions occur more readily under inversion bias.
  • n-Si GOS shows localized, cone-shaped Si melt explosions.
  • p-Si GOS exhibits shallow, laterally spreading trenches in SiO2/Si.
  • Damage morphology is linked to carrier multiplication processes.

Conclusions:

  • Carrier multiplication mechanisms dictate micro-explosion behavior in GOS structures.
  • Findings provide insights for designing GOS-based atomizers for chip-scale AES.
  • Optimization can lead to low-voltage, high-sensitivity analysis of small analyte volumes.