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

Thermal expansion and Thermal stress: Problem Solving01:27

Thermal expansion and Thermal stress: Problem Solving

2.1K
San Francisco's Golden Gate Bridge is exposed to temperatures ranging from -15 °C to 40 °C. At its coldest, the main span of the bridge is 1275 m long. Assuming that the bridge is made entirely of steel, what is the change in its length between these temperatures?
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in temperature (ΔT) is 55...
2.1K
Structure of Benzene: Molecular Orbital Model01:18

Structure of Benzene: Molecular Orbital Model

12.3K
According to the molecular orbital (MO) model, benzene has a planar structure with a regular hexagon of six sp2 hybridized carbons. As shown in Figure 1, each carbon is bonded to three other atoms with C–C–C and H–C–C bond angles of 120°. The C–H bond length is 109 pm, and the C–C bond length is 139 pm which is midway between the single bond length of sp3 hybridized carbons (154 pm) and sp2 hybridized carbons (133 pm).
12.3K
Benzene to Phenol via Cumene: Hock Process01:27

Benzene to Phenol via Cumene: Hock Process

4.2K
The synthesis of phenol from benzene via cumene and cumene hydroperoxide is called the Hock process. First, a Friedel–Crafts alkylation reaction of benzene with propene gives cumene. Then cumene forms cumene hydroperoxide via a radical chain reaction. In the chain initiation step, the benzylic hydrogen is abstracted to give a benzylic radical. In the chain propagation step, the benzylic radical reacts with an oxygen diradical to form a cumene hydroperoxide radical. The cumene...
4.2K
Structure of Benzene: Kekulé Model01:07

Structure of Benzene: Kekulé Model

11.8K
In 1865, August Kekule suggested the structure of benzene according to the structural theory of organic chemistry based on the three assertions—formula of benzene is C6H6, all the hydrogens of benzene are equivalent, and each carbon must have four bonds due to its tetravalency.
He proposed that benzene has a cyclic structure of six carbon atoms attached to one hydrogen atom each, with three alternating pi bonds.
11.8K
NMR Spectroscopy of Benzene Derivatives01:34

NMR Spectroscopy of Benzene Derivatives

11.1K
Simple unsubstituted benzene has six aromatic protons, all chemically equivalent. Therefore, benzene exhibits only a singlet peak at δ 7.3 ppm in the 1H NMR spectrum. The observed shift is far downfield because the aromatic ring current strongly deshields the protons. Any substitution on the benzene ring makes the aromatic protons nonequivalent, and the protons split each other. The peak is, therefore, no longer a singlet and the splitting pattern and their associated coupling...
11.1K
Thermal Strain01:19

Thermal Strain

2.8K
Thermal strain is a concept that arises when we consider how temperature changes affect structures. Unlike the conventional assumption that structures remain constant under load, real-world scenarios often involve temperature fluctuations that can significantly impact these structures. Consider a homogeneous rod with a uniform cross-section resting freely on a flat horizontal surface. If the rod's temperature increases, the rod elongates. This elongation is proportional to the temperature...
2.8K

You might also read

Related Articles

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

Sort by
Same author

Compact mid-infrared fiber probe for in vivo multi-compound monitoring demonstrated using ex vivo human skin.

Nature communications·2026
Same author

Mechanistic Insights into the Competitive Adsorption-Desorption of Volatile Organic Compounds in Mesoporous Matrices.

ACS applied materials & interfaces·2026
Same author

3D-printed micro-pore evaporator for increasing concentration of analytes in aqueous solutions.

Lab on a chip·2025
Same author

Experimental and numerical investigation of microdialysis probes for ethanol metabolism studies.

Analytical methods : advancing methods and applications·2024
Same author

Sorption Kinetics and Sequential Adsorption Analysis of Volatile Organic Compounds on Mesoporous Silica.

ACS omega·2022
Same author

Point-of-care and self-testing for potassium: recent advances.

Sensors & diagnostics·2022
Same journal

Electrospun Liquid Crystal Elastomers as Stress-Free Thermo- and Photoresponsive Actuators.

ACS applied materials & interfaces·2026
Same journal

Tunable Electrical Transport and Magnetic Anisotropy in Textured SrRuO<sub>3</sub> Films Mediated by Gap Control of Monolayer Ca<sub>2</sub>Nb<sub>3</sub>O<sub>10</sub> Nanosheet Templates.

ACS applied materials & interfaces·2026
Same journal

Label-Free Capacitive Immunosensing of Lactate Dehydrogenase and Interleukin-6 Using a Protein-Passivated Graphene Interface.

ACS applied materials & interfaces·2026
Same journal

Improved Carrier Transport and Enhanced Detection Sensitivity Through Zr<sup>4+</sup> Doping in LiYMo<sub>2</sub>O<sub>8</sub> Single Crystals for X-ray Detectors.

ACS applied materials & interfaces·2026
Same journal

Near-Infrared Light-Driven Microgrooved UCNPs/Azobenzene-LCE Actuators and Substrates for Cardiomyoblast Alignment.

ACS applied materials & interfaces·2026
Same journal

Recent Advances in Superlattice-Based Thermoelectrics.

ACS applied materials & interfaces·2026
See all related articles

Related Experiment Video

Updated: Jan 28, 2026

Preparation of Macroporous Epitaxial Quartz Films on Silicon by Chemical Solution Deposition
07:37

Preparation of Macroporous Epitaxial Quartz Films on Silicon by Chemical Solution Deposition

Published on: December 21, 2015

9.7K

Thermally Controlled Benzene Sorption Using PDMS-Infused Macroporous Silicon Matrices.

Isabelle L Williams1,2, Nirmalay Barua2,3, Lexi Menges2

  • 1McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States.

ACS Applied Materials & Interfaces
|January 26, 2026
PubMed
Summary
This summary is machine-generated.

This study introduces a novel silicon-polydimethylsiloxane composite material for preconcentrators, improving sensor selectivity and sensitivity for detecting trace levels of benzene and other volatile organic compounds (VOCs). The new material ensures uniform heating for enhanced performance in low-cost sensors.

Keywords:
BTEXadsorbentgas sensingporous materialspreconcentrationsorption

More Related Videos

Improved Polydimethylsiloxane (PDMS) Double Casting via Silicone Oil Treatment for Densely Packed Microstructure Replication
07:01

Improved Polydimethylsiloxane (PDMS) Double Casting via Silicone Oil Treatment for Densely Packed Microstructure Replication

Published on: July 18, 2025

1.6K
Evaluation of Drug Sorption to PVC- and Non-PVC-based Tubes in Administration Sets Using a Pump
06:08

Evaluation of Drug Sorption to PVC- and Non-PVC-based Tubes in Administration Sets Using a Pump

Published on: March 11, 2017

11.1K

Related Experiment Videos

Last Updated: Jan 28, 2026

Preparation of Macroporous Epitaxial Quartz Films on Silicon by Chemical Solution Deposition
07:37

Preparation of Macroporous Epitaxial Quartz Films on Silicon by Chemical Solution Deposition

Published on: December 21, 2015

9.7K
Improved Polydimethylsiloxane (PDMS) Double Casting via Silicone Oil Treatment for Densely Packed Microstructure Replication
07:01

Improved Polydimethylsiloxane (PDMS) Double Casting via Silicone Oil Treatment for Densely Packed Microstructure Replication

Published on: July 18, 2025

1.6K
Evaluation of Drug Sorption to PVC- and Non-PVC-based Tubes in Administration Sets Using a Pump
06:08

Evaluation of Drug Sorption to PVC- and Non-PVC-based Tubes in Administration Sets Using a Pump

Published on: March 11, 2017

11.1K

Area of Science:

  • Materials Science
  • Sensor Technology
  • Environmental Monitoring

Background:

  • Benzene, toluene, ethylbenzene, and xylene (BTEX) pose significant health risks, with benzene being particularly hazardous at low concentrations.
  • Existing portable sensors struggle to selectively detect similar gases like BTEX.
  • Gas preconcentration enhances sensor sensitivity and selectivity but is limited by poor thermal conductivity in conventional materials.

Purpose of the Study:

  • To develop a cost-effective, selective, and sensitive preconcentrator for trace-level detection of volatile organic compounds (VOCs).
  • To address the limitations of poor thermal conductivity in traditional preconcentrator materials.
  • To engineer a preconcentrator that facilitates homogeneous temperature distribution for improved sensor performance.

Main Methods:

  • Fabrication of composite macroporous silicon (Si)-polydimethylsiloxane (PDMS) preconcentrators with varying pore sizes (1, 2, 5, 8 μm).
  • Evaluation of preconcentrator performance using a photoionization detector (PID) to measure benzene.
  • Comparison with control samples: thin PDMS on Si and thick PDMS.

Main Results:

  • The 1 μm macroporous Si-PDMS preconcentrator demonstrated the sharpest thermal desorption peaks, indicating rapid and homogeneous heating of the PDMS sorbent.
  • Enhanced gas diffusion flux was observed in thin PDMS on Si, leading to higher desorption peak heights.
  • The macroporous Si-PDMS composite facilitated uniform temperature distribution, crucial for precise sorption control and sensor performance.

Conclusions:

  • Macroporous Si-PDMS composites show significant potential as practical preconcentrators for low-cost VOC sensors.
  • The engineered material overcomes the thermal conductivity limitations of conventional preconcentrators.
  • This advancement supports the development of more effective sensors for detecting hazardous VOCs like benzene at trace levels.