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Related Concept Videos

Oral Cavity01:11

Oral Cavity

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The oral cavity, or the mouth, is a complex structure in humans that plays a vital role in our day-to-day lives. Its role is not only in chewing and swallowing food; it also plays a role in speech and facial expressions.
Teeth: The teeth are the hardest structures in our bodies. Humans have two sets of teeth throughout their lifetime: deciduous (baby) teeth and permanent teeth. Each tooth consists of several parts: the crown (visible part), the root (embedded in the jaw), enamel (hard outer...
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The nose is composed of an observable exterior segment (external nose) and an internal segment within the skull known as the nasal cavity (internal nose). The external nose, visible on the face, consists of a framework of bone and hyaline cartilage enveloped in skin and muscle and lined with a mucous membrane. This structure is supported by the frontal bone, nasal bones, and maxillary bone and is supplemented by a cartilaginous framework comprising the septal nasal cartilage, lateral nasal...
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Masonry Cavity Walls01:26

Masonry Cavity Walls

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Cavity walls feature a hollow space between the outer and inner wythes, connected only by corrosion-resistant metal ties. When water seeps through the outer wythe, it descends within this cavity, intercepted by flashing and eventually exiting through weep holes. To enhance moisture resistance, the inner wythe's cavity side often receives damp-proofing, doubling as an air barrier. The cavity can also house insulation to mitigate heat transfer.
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Standing Waves in a Cavity01:28

Standing Waves in a Cavity

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A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
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Pressure Relationships in Thoracic Cavity01:24

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Breathing, otherwise known as pulmonary ventilation, is the process of air movement into and out of the lungs. The main mechanisms propelling pulmonary ventilation are atmospheric pressure (Patm), intra-pulmonary (Ppul ) or intra-alveolar pressure (Palv) within the alveoli, and intrapleural pressure (Pip) within the pleural cavity.
Breathing Mechanisms
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Cavity Drainage and Flashings in Masonry walls01:20

Cavity Drainage and Flashings in Masonry walls

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Typically, a cavity wall consists of two wythes separated by a gap of at least 2 inches, which may contain insulation while still maintaining a minimum clear space of 1 inch to facilitate adequate drainage. Advanced methods like the insertion of a continuous drainage mat can further reduce this space while ensuring effective moisture expulsion.
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Related Experiment Video

Updated: Jan 26, 2026

Development and Functionalization of Electrolyte-Gated Graphene Field-Effect Transistor for Biomarker Detection
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Graphene-Activated Optoplasmonic Nanomembrane Cavities for Photodegradation Detection.

Yin Yin1, Jinbo Pang, Jiawei Wang2,3

  • 1School of Materials Science and Engineering , Jiangsu University , 212013 Zhenjiang , China.

ACS Applied Materials & Interfaces
|April 10, 2019
PubMed
Summary

This study introduces graphene-activated optoplasmonic cavities for real-time monitoring of organic dye photodegradation. This novel sensor technology enables highly sensitive, molecular-level analysis of degradation dynamics.

Keywords:
grapheneoptoplasmonic sensorsphotocatalystsphotodegradationwhispering gallery modes

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Optoelectronics

Background:

  • Graphene's unique properties, including chemical stability and electric field enhancement, make it promising for advanced optical and optoelectronic devices.
  • Integrating graphene with plasmonic systems can create hybrid structures with enhanced functionalities.
  • Rolled-up nanomembranes offer a versatile platform for constructing novel optical cavities.

Purpose of the Study:

  • To design and demonstrate graphene-activated optoplasmonic cavities for real-time, in situ monitoring of molecular photodegradation.
  • To leverage graphene's electric field enhancement for highly sensitive surface detection.
  • To investigate the photodegradation dynamics of organic dye molecules at the molecular level.

Main Methods:

  • Fabrication of graphene-activated optoplasmonic cavities using rolled-up nanomembranes.
  • Utilizing hybrid optoplasmonic modes enhanced by the graphene layer.
  • Monitoring the photodegradation of rhodamine 6G molecules via optical resonance shifts upon laser irradiation.

Main Results:

  • Demonstration of graphene-activated optoplasmonic cavities with significantly enhanced electric fields at the cavity surface.
  • Achieved highly sensitive surface detection capabilities for monitoring molecular processes.
  • Successfully monitored the real-time photodegradation dynamics of rhodamine 6G molecules.

Conclusions:

  • Graphene-activated optoplasmonic cavities provide a powerful platform for real-time, high-precision analysis of photodegradation.
  • This technology facilitates a comprehensive understanding of degradation mechanisms.
  • The developed sensor system holds promise for exploring and identifying effective photocatalysts.