Search NASA⌕ Search
Home/Archive/DOE OSTI

DOE OSTI · 1865009

Quantum Light Emission from Coupled Defect States in DNA-Functionalized Carbon Nanotubes

Zheng, Yu·Kim, Younghee·Jones, Andrew C.·Olinger, Gabrielle·Bittner, Eric R.·Bachilo, Sergei M.·Doorn, Stephen K.·Weisman, R. Bruce·Piryatinski, Andrei·Htoon, Han
View original source ↗Read source document ↗Export metadata ↓

Abstract

Solid-state single-photon sources are essential building blocks for quantum photonics and quantum information technologies. This study demonstrates promising single-photon emission from quantum defects generated in single-wall carbon nanotubes (SWCNTs) by covalent reaction with guanine nucleotides in their single-stranded DNA coatings. Low-temperature photoluminescence spectroscopy and photon-correlation measurements on individual guanine-functionalized SWCNTs (GF-SWCNTs) indicate that multiple, closely spaced guanine defect sites within a single ssDNA strand collectively form an exciton trapping potential that supports a localized quantum state capable of room-temperature single-photon emission. In addition, exciton traps from adjacent ssDNA strands are weakly coupled to give cross-correlations between their separate photon emissions. Theoretical modeling identifies coupling mechanism as a capture of band-edge excitons. Finally, because the spatial pattern of nanotube functionalization sites can be readily controlled by selecting ssDNA base sequences, GF-SWCNTs should become a versatile family of quantum light emitters with engineered properties.

Explore related subjects

36 MATERIALS SCIENCEDNA-engineered quantum coupling, chemical functionalization, exciton localization, defect-state emission, photon antibunchingMaterial Sciencecarbon nanotubesdefectsnanotubesphysical and chemical processes

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

Zheng, Yu, Kim, Younghee, Jones, Andrew C., Olinger, Gabrielle, Bittner, Eric R., Bachilo, Sergei M., Doorn, Stephen K., Weisman, R. Bruce, Piryatinski, Andrei, Htoon, Han. 2021-06-01. Quantum Light Emission from Coupled Defect States in DNA-Functionalized Carbon Nanotubes. https://doi.org/10.1021/acsnano.1c02709

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related reports

DOE OSTI2026

Cyclic moisture reactivation of calcium sorbents for long duration thermochemical energy storage

The transition to a flexible and reliable energy infrastructure, using electro-thermal energy generation technologies such as geothermal, concentrated solar power, and nuclear, usually demands simultaneous advancement of thermal energy storage (TES) to support on-demand electricity generation and industrial applications while mitigating the inherent intermittency of renewable energy sources and power outages from direct energy generation. Among TES technologies, thermochemical energy storage (TCES) based on calcium looping emerges as a compelling high-power energy storage candidate due to its high reaction enthalpy, compatibility with elevated operating temperatures, and abundance of low-cost materials. However, the long-term durability of calcium-based sorbents for TCES is hindered by surface sintering and particle aggregation, leading to performance degradation over repeated thermal cycles. This study explores a moisture hydration-based strategy to regenerate a degraded calcium sorbent and mitigate performance degradation for long duration TCES. The addition of moisture transforms calcium oxide into calcium hydroxide and produces intercalation water layers, associated with a regenerated surface area and reduced calcium oxide crystallite size. Both these effects are beneficial in restoring the sorbents' reactivity for carbonization. Additionally, an optimized hydration-assisted reactivation protocol balances the recovered energy storage capacity with heating penalty required for moisture removal from hydrated samples, resulting in an enhanced energy storage capacity up to 176% compared to benchmark sorbents that undergo cycling without reactivation after 60 cycles. In conclusion, these results highlight the potential of hydration-assisted reactivation to enhance the long-term performance of TCES, providing an effective pathway to advancing electro-thermal storage technologies.

36 MATERIALS SCIENCE↗