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

Solution Composition During Acid/Base Titrations01:17

Solution Composition During Acid/Base Titrations

1.5K
The titration of a weak acid with a strong base results in the formation of water and the conjugate base of the acid. For instance, titrating acetic acid with sodium hydroxide leads to the formation of water and sodium acetate. A solution of acetic acid and sodium acetate constitutes a buffer whose relative concentration at different stages of the titration is indicated by the α values, which represent percentages of the weak acid and its conjugate base.
The α0 and α1 values...
1.5K
Classifying Matter by Composition03:35

Classifying Matter by Composition

89.9K
Matter: Pure Substances and Mixtures
According to its composition, the matter can be classified into two broad categories — pure substances and mixtures. 
A pure substance is a form of matter that has a constant composition throughout with uniform properties. For example, any sample of sucrose has the same composition and same physical properties, such as melting point, color, and sweetness, regardless of the source from which it is isolated. 
A mixture is composed of two or...
89.9K
Composition of Blood01:22

Composition of Blood

11.6K
The blood in our bodies comprises three major components: blood plasma, formed elements, and the extracellular matrix. Blood plasma is a yellowish fluid that constitutes 55% of the total blood volume. It is primarily made up of water and essential substances such as electrolytes and proteins. Blood plasma serves as a medium for transporting blood cells and also contains nutrients, enzymes, hormones, antibodies, and gases.
Formed elements constitute the remaining 45% of the blood volume. These...
11.6K
Composite Bodies00:55

Composite Bodies

1.4K
A composite body is a body made up of multiple parts, connected to form a larger, unified object. Each part has its own weight and center of gravity, which must be considered to determine the center of gravity of the composite body. In cases where the density or specific weight is constant, the center of gravity coincides with the centroid.
Composite bodies have widespread applications in mechanical engineering, from automobiles to aircraft to rockets. For example, an automobile wheel comprises...
1.4K
Composition of Body Fluids01:29

Composition of Body Fluids

2.4K
Water functions as a solvent accommodating various solutes, which can be categorized under electrolytes and non-electrolytes. Non-electrolytes are usually held together by covalent bonds, restricting them from dissociating in solution, thereby leading to a lack of electrically charged components upon dissolving in water. They are predominantly organic molecules, such as glucose, creatinine, and urea. Electrolytes, on the other hand, are compounds that can break down into ions in water.
2.4K
Composition of Blood Plasma01:24

Composition of Blood Plasma

8.0K
Blood plasma is a fluid that contains approximately 92% water and 8% solutes. The solutes include various types of proteins, which constitute about 7% of the total solutes in the plasma. The high-molecular-weight proteins—albumins, globulins, and fibrinogen—are essential to plasma function. Albumins, making up about 60% of the plasma proteins, maintain the osmotic balance within blood vessels by preventing excessive water leakage. Additionally, albumins serve as carrier proteins,...
8.0K

You might also read

Related Articles

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

Sort by
Same author

Turn left or turn right? Lessons from the management of intraoperative cardiac arrest due to Type I Kounis syndrome: a case report.

Frontiers in medicine·2026
Same author

Hydrogel metapad with ultrasound transparency and broadband focusing for biomedical imaging.

National science review·2026
Same author

Analysis of prognostic risk factors and risk management measures for patients with ischemic stroke and bloodstream infection based on machine learning.

Frontiers in cellular and infection microbiology·2026
Same author

A quercetin-modified bifunctional system for efficient acute pancreatitis treatment via inhibiting oxidative stress and modulating inflammation.

Journal of colloid and interface science·2025
Same author

FePtCoNiCu High-Entropy Nanozymes Embedded in a Hydrogel Matrix as a Portable, Rapid, and Visual On-Site Biosensing Platform.

Analytical chemistry·2025
Same author

Topical delivery of cultivated limbal stem cells via porous photocurable hydrogel: A noninvasive, convenient, and efficient stem cells delivery strategy for limbal stem cell deficiency.

Journal of controlled release : official journal of the Controlled Release Society·2025

Related Experiment Video

Updated: Jan 23, 2026

Nanostructured Ag-zeolite Composites as Luminescence-based Humidity Sensors
07:13

Nanostructured Ag-zeolite Composites as Luminescence-based Humidity Sensors

Published on: November 15, 2016

10.6K

Cu2+ and Fe2+ Sensor Based on CdTe QD@ZIF-8 Composites.

Aiyu Zhang1, Chaoyu Fan1, Wen Sun1

  • 1School of Material Science and Engineering, University of Jinan, 250022, Jinan, China.

Journal of Nanoscience and Nanotechnology
|June 15, 2019
PubMed
Summary

This study developed a novel luminescent sensor using cadmium telluride (CdTe) quantum dots (QDs) encapsulated in ZIF-8. This composite material effectively detects copper (Cu2+) and iron (Fe2+) ions with high sensitivity and stability.

More Related Videos

Measuring Composition of CD95 Death-Inducing Signaling Complex and Processing of Procaspase-8 in this Complex
07:17

Measuring Composition of CD95 Death-Inducing Signaling Complex and Processing of Procaspase-8 in this Complex

Published on: August 2, 2021

2.9K
An Aptamer-based Sensor for Unchelated GadoliniumIII
05:15

An Aptamer-based Sensor for Unchelated GadoliniumIII

Published on: January 9, 2017

7.8K

Related Experiment Videos

Last Updated: Jan 23, 2026

Nanostructured Ag-zeolite Composites as Luminescence-based Humidity Sensors
07:13

Nanostructured Ag-zeolite Composites as Luminescence-based Humidity Sensors

Published on: November 15, 2016

10.6K
Measuring Composition of CD95 Death-Inducing Signaling Complex and Processing of Procaspase-8 in this Complex
07:17

Measuring Composition of CD95 Death-Inducing Signaling Complex and Processing of Procaspase-8 in this Complex

Published on: August 2, 2021

2.9K
An Aptamer-based Sensor for Unchelated GadoliniumIII
05:15

An Aptamer-based Sensor for Unchelated GadoliniumIII

Published on: January 9, 2017

7.8K

Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemical Sensing

Background:

  • Quantum dots (QDs) offer unique optical properties but often suffer from poor stability.
  • Metal-organic frameworks (MOFs), like ZIF-8, provide protective environments for nanomaterials.
  • Developing robust luminescent sensors for heavy metal ion detection is crucial.

Purpose of the Study:

  • To encapsulate TGA-capped CdTe QDs within a ZIF-8 matrix.
  • To enhance the photoluminescent stability of CdTe QDs.
  • To create a sensitive and selective luminescent sensor for Cu2+ and Fe2+ ions.

Main Methods:

  • Encapsulation of thioglycolic acid (TGA)-capped CdTe QDs into microporous ZIF-8.
  • Characterization of the CdTe QD@ZIF-8 composite material.
  • Investigation of luminescent properties and sensing performance for metal ions.

Main Results:

  • CdTe QDs were successfully encapsulated in ZIF-8 with preserved photoluminescence.
  • The CdTe QD@ZIF-8 composite exhibited enhanced luminescent stability in various buffer solutions.
  • The composite functioned as a luminescent sensor, with luminescence quenching observed for Cu2+ and Fe2+ ions.
  • Detection ranges were established: 1-50 µM for Cu2+ and 1-60 µM for Fe2+.
  • A 'competing transmission' mechanism was proposed to explain the sensor's selectivity.

Conclusions:

  • The CdTe QD@ZIF-8 composite demonstrates superior luminescent stability compared to bare QDs.
  • This material serves as an effective luminescent indicator for the selective detection of Cu2+ and Fe2+ ions.
  • The proposed mechanism highlights the interplay between QD surface bonding and ZIF-8 adsorptivity for selective metal ion sensing.