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Related Concept Videos

The Periodic Table03:25

The Periodic Table

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As early chemists discovered more elements, they realized that various elements could be grouped by their similar chemical behaviors. One such grouping includes lithium (Li), sodium (Na), and potassium (K). All of these elements are shiny, conduct heat and electricity well, and have similar chemical properties. A second grouping includes calcium (Ca), strontium (Sr), and barium (Ba), which also are shiny, good conductors of heat and electricity, and have chemical properties in common. However,...
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The periodic table arranges atoms based on increasing atomic number so that elements with the same chemical properties recur periodically. When their electron configurations are added to the table, a periodic recurrence of similar electron configurations in the outer shells of these elements is observed. Because they are in the outer shells of an atom, valence electrons play the most important role in chemical reactions. The outer electrons have the highest energy of the electrons in an atom...
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Mesh Analysis01:20

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Mesh analysis is a valuable method for simplifying circuit analysis using mesh currents as key circuit variables. Unlike nodal analysis, which focuses on determining unknown voltages, mesh analysis applies Kirchhoff's voltage law (KVL) to find unknown currents within a circuit. This method is particularly convenient in reducing the number of simultaneous equations that need to be solved.
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Metallic Solids02:37

Metallic Solids

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Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
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Properties of Transition Metals02:58

Properties of Transition Metals

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Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
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The fineness of cement directly influences the rate of hydration, as the hydration begins at the surface of the cement particles. In addition to hydration, the fineness of cement is vital for various properties of concrete including workability, gypsum requirement, and long-term behavior. The fineness of cement is represented in terms of the specific surface of cement which is typically measured in square meters per kilogram, with several methods available for this determination.
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Related Experiment Video

Updated: Jan 29, 2026

Scalable Solution-processed Fabrication Strategy for High-performance, Flexible, Transparent Electrodes with Embedded Metal Mesh
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Amplification of Sensor Signals from Metal Mesh Device with Fine Periodic Structure.

Hirokazu Seto1, Atsushi Saiki1, Seiji Kamba2

  • 1Department of Chemical Engineering, Fukuoka University.

Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry
|February 5, 2019
PubMed
Summary
This summary is machine-generated.

New metal mesh biosensors with smaller holes (0.3 μm) show significantly higher sensitivity to protein adsorption. These refined devices amplify output signals, improving biosensing capabilities for detecting biomolecules.

Keywords:
Metal mesh devicebiosensorbiotin-avidin interactionsensitivity amplificationstructural refinement

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Biosensing

Background:

  • Metal mesh devices are explored for sensing applications.
  • Electroforming is a viable method for fabricating micro/nanoscale structures.
  • Protein adsorption can alter the properties of materials.

Purpose of the Study:

  • To develop and characterize novel metal mesh biosensors.
  • To investigate the effect of hole diameter on sensor performance.
  • To evaluate the sensitivity and signal amplification of these biosensors.

Main Methods:

  • Fabrication of metal mesh devices with 1.7 μm and 0.3 μm hole diameters using electroforming.
  • Measurement of electromagnetic wave transmission frequencies (THz range).
  • Analysis of spectral shifts in response to varying protein adsorption levels.

Main Results:

  • Devices transmitted electromagnetic waves at approximately 100 THz (1.7 μm holes) and 285 THz (0.3 μm holes).
  • Spectral frequencies shifted proportionally to protein adsorption.
  • The 0.3 μm device exhibited seven times greater sensitivity than the 1.7 μm device, aligning with theoretical predictions.
  • Structurally refined devices demonstrated amplified output signals.

Conclusions:

  • Metal mesh biosensors with optimized hole diameters offer enhanced sensitivity.
  • The sensitivity is theoretically linked to the square of the transmittance frequency.
  • These refined biosensors show promise for amplified signal detection in biosensing applications.