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Related Concept Videos

Effect of Temperature Change on Reaction Rate02:28

Effect of Temperature Change on Reaction Rate

4.2K
The Arrhenius equation,
4.2K
Phase Transitions: Vaporization and Condensation02:39

Phase Transitions: Vaporization and Condensation

17.7K
The physical form of a substance changes on changing its temperature. For example, raising the temperature of a liquid causes the liquid to vaporize (convert into vapor). The process is called vaporization—a surface phenomenon. Vaporization occurs when the thermal motion of the molecules overcome the intermolecular forces, and the molecules (at the surface) escape into the gaseous state. When a liquid vaporizes in a closed container, gas molecules cannot escape. As these gas phase...
17.7K
Properties of Transition Metals02:58

Properties of Transition Metals

26.2K
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.
26.2K
Phase Transitions: Melting and Freezing02:39

Phase Transitions: Melting and Freezing

12.5K
Heating a crystalline solid increases the average energy of its atoms, molecules, or ions, and the solid gets hotter. At some point, the added energy becomes large enough to partially overcome the forces holding the molecules or ions of the solid in their fixed positions, and the solid begins the process of transitioning to the liquid state or melting. At this point, the temperature of the solid stops rising, despite the continual input of heat, and it remains constant until all of the solid is...
12.5K
Redox Titration: Other Oxidizing and Reducing Agents01:26

Redox Titration: Other Oxidizing and Reducing Agents

330
Besides iodine, other oxidizing or reducing agents can serve as titrants in redox titrations. Common oxidizing titrants include KMnO4, cerium(IV), and K2Cr2O7. The choice of oxidizing titrants depends on factors like stability, cost, analyte strength, and reaction rate between the analyte and titrant. KMnO4 is a strong oxidizing titrant that reduces from Mn(VII) to Mn(II) in a highly acidic solution, simultaneously oxidizing the analyte to a higher oxidation state. In this case, KMnO4 acts as a...
330
Polyprotic Acids03:38

Polyprotic Acids

29.2K
Acids are classified by the number of protons per molecule that they can give up in a reaction. Acids such as HCl, HNO3, and HCN that contain one ionizable hydrogen atom in each molecule are called monoprotic acids. Their reactions with water are:
29.2K

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Related Experiment Video

Updated: Jul 18, 2025

Atomic Layer Deposition of Vanadium Dioxide and a Temperature-dependent Optical Model
11:10

Atomic Layer Deposition of Vanadium Dioxide and a Temperature-dependent Optical Model

Published on: May 23, 2018

12.0K

Reducing phase transition temperature of vanadium dioxide by ascorbic acid.

Yue Wang1, Yuxin Zhang1, Xuekui Xi2

  • 1School of Physical Science and Technology, Inner Mongolia University, Hohhot 010021, People's Republic of China.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|August 25, 2023
PubMed
Summary
This summary is machine-generated.

Researchers developed a simple method using ascorbic acid to lower vanadium dioxide

Keywords:
ascorbic acidphase transition temperaturevanadium dioxide

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Area of Science:

  • Materials Science
  • Solid State Physics

Background:

  • Vanadium dioxide (VO2) exhibits significant optical property changes during phase transition.
  • This property is utilized in applications like thermochromic windows and heat sensors.
  • Tunable phase transition temperature is crucial for expanding VO2 applications.

Purpose of the Study:

  • To verify a novel and straightforward method for reducing the phase transition temperature of VO2.
  • To explore the potential of ascorbic acid in modifying VO2 properties.

Main Methods:

  • Investigated the coordination effect of ascorbic acid on VO2 powder.
  • Measured the phase transition temperature of the modified VO2.

Main Results:

  • A coordination effect of ascorbic acid was confirmed.
  • The phase transition temperature of VO2 powder was successfully reduced to approximately 32 °C.

Conclusions:

  • A simple and efficient method for reducing VO2 phase transition temperature was demonstrated.
  • This technique may significantly enhance the practical applications of VO2.