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

Anoxygenic Photosynthesis01:30

Anoxygenic Photosynthesis

63
Anoxygenic photosynthesis is a phototrophic process that captures light energy to drive carbon fixation without producing molecular oxygen. Unlike oxygenic photosynthesis, which utilizes water as an electron donor and releases oxygen, anoxygenic phototrophs use alternative electron donors such as hydrogen sulfide (H₂S), elemental sulfur (S⁰), or thiosulfate (S₂O₃²⁻). This process is carried out by diverse groups of bacteria, including purple bacteria, green...
63
Carbon-dioxide Fixation01:28

Carbon-dioxide Fixation

46
Carbon dioxide fixation in prokaryotes enables the assimilation of inorganic carbon into organic molecules, supporting biosynthetic pathways, sustaining ecosystems, and contributing to the global carbon cycle. It also has industrial applications in carbon capture and bioproduct synthesis. Autotrophic organisms rely on this process to utilize CO₂ as a carbon source in diverse environments.The Calvin CycleThe Calvin cycle is the most widespread carbon fixation mechanism, primarily used by...
46
Gene Regulation in Microbial Communities: Quorum Sensing01:28

Gene Regulation in Microbial Communities: Quorum Sensing

53
Quorum sensing is a mechanism of bacterial communication that enables coordinated gene expression in response to changes in population density. This facilitates collective behaviors that enhance survival, resource acquisition, and ecological adaptation. This process relies on small signaling molecules called autoinducers that accumulate as bacterial populations grow. When a critical threshold concentration of autoinducers is reached, bacterial cells collectively modify gene expression,...
53
Anoxygenic Phototrophic Bacteria01:28

Anoxygenic Phototrophic Bacteria

81
Anoxygenic phototrophic bacteria are a diverse group of microorganisms that perform photosynthesis without producing oxygen. They primarily include purple sulfur bacteria, purple nonsulfur bacteria, green sulfur bacteria, and green nonsulfur bacteria. These bacteria are classified into the Gammaproteobacteria, Alphaproteobacteria, Betaproteobacteria, Chlorobi, and Chloroflexi lineages, each with distinct physiological and ecological adaptations.Purple sulfur bacteria belong to the...
81
The Z-Scheme of Electron Transport in Photosynthesis01:34

The Z-Scheme of Electron Transport in Photosynthesis

10.3K
The light reactions of photosynthesis assume a linear flow of electrons from water to NADP+. During this process, light energy drives the splitting of water molecules to produce oxygen. However, oxidation of water molecules is a thermodynamically unfavorable reaction and requires a strong oxidizing agent. This is accomplished by the first product of light reactions: oxidized P680 (or P680+), the most powerful oxidizing agent known in biology. The oxidized P680 that acquires an electron from the...
10.3K

You might also read

Related Articles

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

Sort by
Same author

Spheres of Graphene and Carbon Nanotubes Embedding Silicon as Mechanically Resilient Anodes for Lithium-Ion Batteries.

Nano letters·2022
Same author

Highly stretchable van der Waals thin films for adaptable and breathable electronic membranes.

Science (New York, N.Y.)·2022
Same author

Silver nanoparticles boost charge-extraction efficiency in <i>Shewanella</i> microbial fuel cells.

Science (New York, N.Y.)·2021
Same author

Evaluation of the efficacy and postoperative outcomes of hydrodissection-assisted microwave ablation for subcapsular hepatocellular carcinoma and colorectal liver metastases.

Abdominal radiology (New York)·2020
Same author

Effects of salt and kansui on rheological, chemical and structural properties of noodle dough during repeated sheeting process.

Food chemistry·2020
Same author

A Mechanism Underlying Sex-Associated Differences in Ankylosing Spondylitis: Troponin C2, Fast Skeletal Type (TNNC2) and Calcium Signaling Pathway.

Medical science monitor : international medical journal of experimental and clinical research·2020

Related Experiment Video

Updated: Aug 8, 2025

Solubilization and Bio-conjugation of Quantum Dots and Bacterial Toxicity Assays by Growth Curve and Plate Count
13:06

Solubilization and Bio-conjugation of Quantum Dots and Bacterial Toxicity Assays by Growth Curve and Plate Count

Published on: July 11, 2012

14.4K

Maximizing light-driven CO2 and N2 fixation efficiency in quantum dot-bacteria hybrids.

Xun Guan1, Sevcan Erşan2, Xiangchen Hu3

  • 1Department of Chemistry and Biochemistry, University of California Los Angeles, Los Angeles, California 90095, United States.

Nature Catalysis
|February 27, 2023
PubMed
Summary

This study created a microbe-semiconductor hybrid using Xanthobacter autotrophicus and CdTe quantum dots for efficient solar-to-chemical production. The hybrid achieved high internal quantum efficiencies for carbon dioxide (CO2) and nitrogen (N2) fixation, nearing biochemical limits.

More Related Videos

Assembly and Quantification of Co-Cultures Combining Heterotrophic Yeast with Phototrophic Sugar-Secreting Cyanobacteria
05:44

Assembly and Quantification of Co-Cultures Combining Heterotrophic Yeast with Phototrophic Sugar-Secreting Cyanobacteria

Published on: December 27, 2024

912
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

8.9K

Related Experiment Videos

Last Updated: Aug 8, 2025

Solubilization and Bio-conjugation of Quantum Dots and Bacterial Toxicity Assays by Growth Curve and Plate Count
13:06

Solubilization and Bio-conjugation of Quantum Dots and Bacterial Toxicity Assays by Growth Curve and Plate Count

Published on: July 11, 2012

14.4K
Assembly and Quantification of Co-Cultures Combining Heterotrophic Yeast with Phototrophic Sugar-Secreting Cyanobacteria
05:44

Assembly and Quantification of Co-Cultures Combining Heterotrophic Yeast with Phototrophic Sugar-Secreting Cyanobacteria

Published on: December 27, 2024

912
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

8.9K

Area of Science:

  • Biochemistry
  • Materials Science
  • Microbiology

Background:

  • Integrating light-harvesting materials with microbial biochemistry offers a promising route for efficient solar-to-chemical production.
  • Key questions remain regarding photon transfer efficiency at material-biology interfaces and the impact of materials on microbial metabolism.

Purpose of the Study:

  • To investigate the efficiency of photon transfer and the effect of materials on microbial metabolism in a novel microbe-semiconductor hybrid system.
  • To develop a hybrid system for light-driven carbon dioxide (CO2) and nitrogen (N2) fixation.

Main Methods:

  • Fabrication of a hybrid system by interfacing the CO2/N2-fixing bacterium Xanthobacter autotrophicus with cadmium telluride (CdTe) quantum dots.
  • Utilizing photophysical studies to analyze charge-transfer kinetics at the microbe-semiconductor interface.
  • Employing proteomics and metabolomics to assess material-induced regulation of microbial metabolism.

Main Results:

  • Achieved high internal quantum efficiencies for light-driven CO2 fixation (47.2 ± 7.3%) and N2 fixation (7.1 ± 1.1%).
  • Quantum efficiencies approached the biochemical limits imposed by the stoichiometry of the involved biochemical pathways.
  • Demonstrated fast charge-transfer kinetics at the microbe-semiconductor interfaces.
  • Identified material-induced regulation of microbial metabolism that enhances quantum efficiencies compared to biological systems alone.

Conclusions:

  • The microbe-semiconductor hybrid system effectively utilizes light energy for CO2 and N2 fixation, reaching near-biochemical limits.
  • Fast charge transfer and material-induced metabolic regulation are crucial for the enhanced performance of these hybrid systems.
  • This approach represents a significant advancement in solar-to-chemical production, optimizing both material-biology interfaces and microbial metabolic pathways.