Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Quantum Numbers02:43

Quantum Numbers

49.6K
It is said that the energy of an electron in an atom is quantized; that is, it can be equal only to certain specific values and can jump from one energy level to another but not transition smoothly or stay between these levels.
49.6K
The Quantum-Mechanical Model of an Atom02:45

The Quantum-Mechanical Model of an Atom

56.9K
Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra.
56.9K
Photoreceptors and Plant Responses to Light02:00

Photoreceptors and Plant Responses to Light

28.4K
Light plays a significant role in regulating the growth and development of plants. In addition to providing energy for photosynthesis, light provides other important cues to regulate a range of developmental and physiological responses in plants.
28.4K
Target Cell Response to Hormones01:22

Target Cell Response to Hormones

5.3K
Hormones intricately bind to receptors on the surface or within target cells, initiating a cascade of cellular responses.
Notably, the cellular response can be regulated by altering the number of receptors expressed in the cell. For example, prolonged exposure to elevated hormone levels results in a gradual decline or down-regulation in the number of receptors for that specific hormone on the cell surface. Conversely, in response to low hormone levels, cells may use up-regulation, producing an...
5.3K
Protein Complexes with Interchangeable Parts01:57

Protein Complexes with Interchangeable Parts

2.9K
Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order...
2.9K
Dot Product01:29

Dot Product

945
The dot product is an essential concept in mathematics and physics.
In engineering, the dot product of any two vectors is the product of the magnitudes of the vectors and the cosine of the angle between them. It is denoted by a dot symbol between the two vectors.
Consider a vehicle pulling an object along the ground using a rope. If the rope makes an angle with the horizontal axis, the work done can be calculated using the dot product of the force applied and the object's displacement.
The dot...
945

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Microwave-assisted thermal profiling of blood: a potential biomarker for differentiating cancer and non-cancer states.

Journal of medical engineering & technology·2026
Same author

Surfactant-Mediated Doubling of Förster Resonance Energy Transfer in Quinolate-Complexed CdS Quantum Dots.

The journal of physical chemistry letters·2026
Same author

The NMR Exchange Format (NEF): Specification and Applications.

bioRxiv : the preprint server for biology·2026
Same author

Loop Plasticity Drives Paralog-Specific Recognition in BET ET Domains.

Journal of chemical information and modeling·2026
Same author

A plasmon-enhanced fluorescent nanoprobe for ultrasensitive and selective detection of nitroaniline derivatives.

Chemical communications (Cambridge, England)·2026
Same author

Structural differentiation of protein charge state conformers via gas-phase ion/ion cross-linking mass spectrometry.

International journal of mass spectrometry·2025

Related Experiment Video

Updated: Jan 27, 2026

Production and Targeting of Monovalent Quantum Dots
10:16

Production and Targeting of Monovalent Quantum Dots

Published on: October 23, 2014

26.0K

A two-target responsive reversible ratiometric pH nanoprobe: a white light emitting quantum dot complex.

Sabyasachi Pramanik1, Shilaj Roy, Arup Mondal

  • 1Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati-781039, India.

Chemical Communications (Cambridge, England)
|March 26, 2019
PubMed
Summary

Researchers developed a novel pH nanosensor using a quantum dot complex. This sensor accurately detects pH changes in the physiological range by monitoring luminescence shifts.

More Related Videos

Enhanced Electron Injection and Exciton Confinement for Pure Blue Quantum-Dot Light-Emitting Diodes by Introducing Partially Oxidized Aluminum Cathode
10:41

Enhanced Electron Injection and Exciton Confinement for Pure Blue Quantum-Dot Light-Emitting Diodes by Introducing Partially Oxidized Aluminum Cathode

Published on: May 31, 2018

9.2K
Correlative Light- and Electron Microscopy Using Quantum Dot Nanoparticles
11:16

Correlative Light- and Electron Microscopy Using Quantum Dot Nanoparticles

Published on: August 7, 2016

10.2K

Related Experiment Videos

Last Updated: Jan 27, 2026

Production and Targeting of Monovalent Quantum Dots
10:16

Production and Targeting of Monovalent Quantum Dots

Published on: October 23, 2014

26.0K
Enhanced Electron Injection and Exciton Confinement for Pure Blue Quantum-Dot Light-Emitting Diodes by Introducing Partially Oxidized Aluminum Cathode
10:41

Enhanced Electron Injection and Exciton Confinement for Pure Blue Quantum-Dot Light-Emitting Diodes by Introducing Partially Oxidized Aluminum Cathode

Published on: May 31, 2018

9.2K
Correlative Light- and Electron Microscopy Using Quantum Dot Nanoparticles
11:16

Correlative Light- and Electron Microscopy Using Quantum Dot Nanoparticles

Published on: August 7, 2016

10.2K

Area of Science:

  • Materials Science
  • Nanotechnology
  • Analytical Chemistry

Background:

  • Accurate pH monitoring is crucial in biological and chemical systems.
  • Developing sensitive and reversible nanosensors remains a key challenge.

Purpose of the Study:

  • To create a white light emitting quantum dot complex for ratiometric pH sensing.
  • To evaluate the nanosensor's performance in the physiological pH range.

Main Methods:

  • Synthesized a complex of Mn2+-doped ZnS quantum dots (orange emission) and zinc-quinolate (greenish-blue emission).
  • Utilized changes in luminescence intensity ratio, color, and chromaticity for pH detection.
  • Tested the nanosensor's reversibility and response within the pH range of 6.5-10.3.

Main Results:

  • The quantum dot complex exhibited white light emission.
  • The nanosensor demonstrated a ratiometric and reversible response to pH changes.
  • Detection was achieved by monitoring luminescence intensity ratio, color, and chromaticity shifts.

Conclusions:

  • The developed quantum dot complex functions as an effective two-target responsive ratiometric reversible pH nanosensor.
  • This nanosensor shows potential for real-time pH monitoring in physiological conditions.