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Related Concept Videos

Molecular Spectroscopy: Absorption and Emission01:14

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Molecules possess discrete energy levels called quantum states. Unlike atoms, which have simpler energy levels, molecules possess additional rotational and vibrational energy levels.  Each energy level is separated by an energy gap, with the gaps between adjacent electronic, vibrational, and rotational levels varying significantly. The three types of energy levels in a diatomic molecule are shown in Figure 1.
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In Ultraviolet–Visible (UV–Vis) spectroscopy, the absorption of electromagnetic radiation is used to probe the electronic structure of molecules. This technique provides insights into molecular electronic transitions, particularly the movement of electrons between different molecular orbitals. Radiation is absorbed if the energy of the electromagnetic radiation passing through the molecule is precisely equal to the energy difference between the excited and ground states. During this...
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When Infrared (IR) radiation passes through a covalently bonded molecule, the bonds transition from lower to higher vibrational levels. The fundamental vibrational motions that result in infrared absorption can be classified as stretching or bending vibrations.
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A Molecular Approach to Quantum Sensing.

Chung-Jui Yu1, Stephen von Kugelgen1, Daniel W Laorenza1

  • 1Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States.

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|June 3, 2021
PubMed
Summary
This summary is machine-generated.

Molecular quantum sensing offers a customizable approach to creating highly sensitive quantum sensors. This technology enables precise environmental interaction for advanced applications in biology and condensed matter physics.

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Area of Science:

  • Quantum information science
  • Materials science
  • Nanotechnology

Background:

  • The second quantum revolution requires materials with precise atomic structure and tunable electronic properties.
  • Molecular approaches enable bottom-up construction of quantum systems for quantum information science (QIS).
  • Quantum sensing utilizes quantum control for environmental interrogation, demanding adaptable sensors.

Purpose of the Study:

  • To focus on quantum sensing within QIS.
  • To outline design criteria for broadly applicable quantum sensors.
  • To explore the potential of molecular sensors for next-generation quantum sensing.

Main Methods:

  • Focusing on molecular approaches for quantum sensor design.
  • Defining key criteria for adaptable quantum sensors: environmental compatibility, distance control, and tunable energy range.
  • Reviewing current concepts and design principles in quantum sensing.

Main Results:

  • Molecules offer customizable "designer" quantum sensors with tunable functionality.
  • Molecular sensors provide adaptability across diverse environments.
  • Potential for enhanced sensitivity and spatial resolution in sensing applications.

Conclusions:

  • Molecular quantum sensors represent a promising avenue for the next generation of quantum technologies.
  • Customizable molecular designs can meet the demands for advanced quantum sensing.
  • This approach can address challenges in biological processes and condensed matter physics.