1
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Boyce A, Li H, Wilson NC, Acil D, Shams-Ansari A, Chakravarthi S, Pederson C, Shen Q, Yama N, Fu KMC, Loncar M, Mikkelsen MH. Plasmonic Diamond Membranes for Ultrafast Silicon Vacancy Emission. Nano Lett 2024; 24:3575-3580. [PMID: 38478720 PMCID: PMC10979444 DOI: 10.1021/acs.nanolett.3c04002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 02/16/2024] [Accepted: 02/20/2024] [Indexed: 03/28/2024]
Abstract
Silicon vacancy centers (SiVs) in diamond have emerged as a promising platform for quantum sciences due to their excellent photostability, minimal spectral diffusion, and substantial zero-phonon line emission. However, enhancing their slow nanosecond excited-state lifetime by coupling to optical cavities remains an outstanding challenge, as current demonstrations are limited to ∼10-fold. Here, we couple negatively charged SiVs to sub-diffraction-limited plasmonic cavities and achieve an instrument-limited ≤8 ps lifetime, corresponding to a 135-fold spontaneous emission rate enhancement and a 19-fold photoluminescence enhancement. Nanoparticles are printed on ultrathin diamond membranes on gold films which create arrays of plasmonic nanogap cavities with ultrasmall volumes. SiVs implanted at 5 and 10 nm depths are examined to elucidate surface effects on their lifetime and brightness. The interplay between cavity, implantation depth, and ultrathin diamond membranes provides insights into generating ultrafast, bright SiV emission for next-generation diamond devices.
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Affiliation(s)
- Andrew
M. Boyce
- Department
of Electrical and Computer Engineering, Duke University, Durham, North Carolina 27708, United States
| | - Hengming Li
- Department
of Electrical and Computer Engineering, Duke University, Durham, North Carolina 27708, United States
| | - Nathaniel C. Wilson
- Department
of Physics, Duke University, Durham, North Carolina 27708, United States
| | - Deniz Acil
- Department
of Electrical and Computer Engineering, Duke University, Durham, North Carolina 27708, United States
| | - Amirhassan Shams-Ansari
- John
A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Srivatsa Chakravarthi
- Department
of Physics, University of Washington, Seattle, Washington 98195, United States
| | - Christian Pederson
- Department
of Physics, University of Washington, Seattle, Washington 98195, United States
| | - Qixin Shen
- Department
of Physics, Duke University, Durham, North Carolina 27708, United States
| | - Nicholas Yama
- Department
of Electrical and Computer Engineering, University of Washington, Seattle, Washington 98195, United States
| | - Kai-Mei C. Fu
- Department
of Physics, University of Washington, Seattle, Washington 98195, United States
- Department
of Electrical and Computer Engineering, University of Washington, Seattle, Washington 98195, United States
| | - Marko Loncar
- John
A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Maiken H. Mikkelsen
- Department
of Electrical and Computer Engineering, Duke University, Durham, North Carolina 27708, United States
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2
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Zhang H, Liu Q, Deng L, Ma Y, Daneshmandi S, Cen C, Zhang C, Voyles PM, Jiang X, Zhao J, Chu CW, Gai Z, Li L. Room-Temperature Ferromagnetism in Epitaxial Bilayer FeSb/SrTiO 3(001) Terminated with a Kagome Lattice. Nano Lett 2024; 24:122-129. [PMID: 37913524 PMCID: PMC10786153 DOI: 10.1021/acs.nanolett.3c03415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 10/17/2023] [Accepted: 10/18/2023] [Indexed: 11/03/2023]
Abstract
Two-dimensional (2D) magnets exhibit unique physical properties for potential applications in spintronics. To date, most 2D ferromagnets are obtained by mechanical exfoliation of bulk materials with van der Waals interlayer interactions, and the synthesis of single- or few-layer 2D ferromagnets with strong interlayer coupling remains experimentally challenging. Here, we report the epitaxial growth of 2D non-van der Waals ferromagnetic bilayer FeSb on SrTiO3(001) substrates stabilized by strong coupling to the substrate, which exhibits in-plane magnetic anisotropy and a Curie temperature above 390 K. In situ low-temperature scanning tunneling microscopy/spectroscopy and density-functional theory calculations further reveal that an Fe Kagome layer terminates the bilayer FeSb. Our results open a new avenue for further exploring emergent quantum phenomena from the interplay of ferromagnetism and topology for application in spintronics.
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Affiliation(s)
- Huimin Zhang
- Department
of Physics and Astronomy, West Virginia
University, Morgantown, West Virginia 26506, United States
- State
Key Laboratory of Structural Analysis, Optimization and CAE Software
for Industrial Equipment, Dalian University
of Technology, Dalian, 116024, China
| | - Qinxi Liu
- Key
Laboratory of Materials Modification by Laser, Ion and Electron Beams
(Dalian University of Technology), Ministry
of Education, Dalian 116024, China
| | - Liangzi Deng
- Department
of Physics and Texas Center for Superconductivity, University of Houston, Houston, Texas, 77204, United States
| | - Yanjun Ma
- Department
of Physics and Astronomy, West Virginia
University, Morgantown, West Virginia 26506, United States
| | - Samira Daneshmandi
- Department
of Physics and Texas Center for Superconductivity, University of Houston, Houston, Texas, 77204, United States
| | - Cheng Cen
- Department
of Physics and Astronomy, West Virginia
University, Morgantown, West Virginia 26506, United States
- Beijing National
Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Chenyu Zhang
- Department
of Materials Science and Engineering, University
of Wisconsin−Madison, Madison, Wisconsin 53706, United States
| | - Paul M. Voyles
- Department
of Materials Science and Engineering, University
of Wisconsin−Madison, Madison, Wisconsin 53706, United States
| | - Xue Jiang
- State
Key Laboratory of Structural Analysis, Optimization and CAE Software
for Industrial Equipment, Dalian University
of Technology, Dalian, 116024, China
- Key
Laboratory of Materials Modification by Laser, Ion and Electron Beams
(Dalian University of Technology), Ministry
of Education, Dalian 116024, China
| | - Jijun Zhao
- State
Key Laboratory of Structural Analysis, Optimization and CAE Software
for Industrial Equipment, Dalian University
of Technology, Dalian, 116024, China
- Key
Laboratory of Materials Modification by Laser, Ion and Electron Beams
(Dalian University of Technology), Ministry
of Education, Dalian 116024, China
| | - Ching-Wu Chu
- Department
of Physics and Texas Center for Superconductivity, University of Houston, Houston, Texas, 77204, United States
| | - Zheng Gai
- Center
for Nanophase Materials Sciences, Oak Ridge
National Laboratory, Oak Ridge, Tennessee, 37831 United States
| | - Lian Li
- Department
of Physics and Astronomy, West Virginia
University, Morgantown, West Virginia 26506, United States
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3
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Griffin TW, Darsan MA, Collins HI, Holohan BA, Pierce ML, Ward JE. A multi-study analysis of gut microbiome data from the blue mussel (Mytilus edulis) emphasises the impact of depuration on biological interpretation. Environ Microbiol 2023; 25:3435-3449. [PMID: 37941484 DOI: 10.1111/1462-2920.16537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 10/27/2023] [Indexed: 11/10/2023]
Abstract
The blue mussel (Mytilus edulis) is a suspension feeder which has been used in gut-microbiome surveys. Although raw 16S sequence data are often publicly available, unifying secondary analyses are lacking. The present work analysed raw data from seven projects conducted by one group over 7 years. Although each project had different motivations, experimental designs and conclusions, all selected samples were from the guts of M. edulis collected from a single location in Long Island Sound. The goal of this analysis was to determine which independent factors (e.g., collection date, depuration status) were responsible for governing composition and diversity in the gut microbiomes. Results indicated that whether mussels had undergone depuration, defined here as voidance of faeces in a controlled, no-food period, was the primary factor that governed gut microbiome composition. Gut microbiomes from non-depurated mussels were mixtures of resident and transient communities and were influenced by temporal factors. Resident communities from depurated mussels were influenced by the final food source and length of time host mussels were held under laboratory conditions. These findings reinforce the paradigm that gut microbiota are divided into resident and transient components and suggest that depuration status should be taken into consideration when designing and interpreting future experiments.
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Affiliation(s)
- Tyler W Griffin
- Department of Marine Sciences, University of Connecticut, Groton, Connecticut, USA
| | - Mya A Darsan
- Department of Biological Sciences, University at Albany, Albany, New York, USA
- Department of Marine and Environmental Science, Northeastern University, Nahant, Massachusetts, USA
| | - Hannah I Collins
- Department of Marine Sciences, University of Connecticut, Groton, Connecticut, USA
| | - Bridget A Holohan
- Department of Marine Sciences, University of Connecticut, Groton, Connecticut, USA
| | - Melissa L Pierce
- Discovery Partners Institute, Applied R&D, University of Illinois System, Chicago, Illinois, USA
| | - J Evan Ward
- Department of Marine Sciences, University of Connecticut, Groton, Connecticut, USA
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4
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Hall-Thomsen H, Small S, Gavrilov M, Ha T, Schulman R, Moerman PG. Directing Uphill Strand Displacement with an Engineered Superhelicase. ACS Synth Biol 2023; 12:3424-3432. [PMID: 37844274 PMCID: PMC10661026 DOI: 10.1021/acssynbio.3c00452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Indexed: 10/18/2023]
Abstract
The ability to finely tune reaction rates and binding energies between components has made DNA strand displacement circuits promising candidates to replicate the complex regulatory functions of biological reaction networks. However, these circuits often lack crucial properties, such as signal turnover and the ability to transiently respond to successive input signals that require the continuous input of chemical energy. Here, we introduce a method for providing such energy to strand displacement networks in a controlled fashion: an engineered DNA helicase, Rep-X, that transiently dehybridizes specific DNA complexes, enabling the strands in the complex to participate in downstream hybridization or strand displacement reactions. We demonstrate how this process can direct the formation of specific metastable structures by design and that this dehybridization process can be controlled by DNA strand displacement reactions that effectively protect and deprotect a double-stranded complex from unwinding by Rep-X. These findings can guide the design of active DNA strand displacement regulatory networks, in which sustained dynamical behavior is fueled by helicase-regulated unwinding.
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Affiliation(s)
- Helena Hall-Thomsen
- Chemical
& Biomolecular Engineering, Johns Hopkins
University, Baltimore, Maryland 21218, United States
| | - Shavier Small
- Chemical
& Biomolecular Engineering, Johns Hopkins
University, Baltimore, Maryland 21218, United States
| | - Momcilo Gavrilov
- Biophysics
and Biophysical Chemistry, Johns Hopkins
University, Baltimore, Maryland 21218, United States
| | - Taekjip Ha
- Biophysics
and Biophysical Chemistry, Johns Hopkins
University, Baltimore, Maryland 21218, United States
- Biomedical
Engineering, Johns Hopkins University, Baltimore, Maryland 21218, United States
- Howard
Hughes Medical Institute, Chevy
Chase, Maryland 20815, United States
| | - Rebecca Schulman
- Chemical
& Biomolecular Engineering, Johns Hopkins
University, Baltimore, Maryland 21218, United States
- Computer
Science, Johns Hopkins University, Baltimore, Maryland 21218, United States
- Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Pepijn Gerben Moerman
- Chemical
& Biomolecular Engineering, Johns Hopkins
University, Baltimore, Maryland 21218, United States
- Chemical
Engineering and Chemistry, Eindhoven University
of Technology, Eindhoven 5612 AP, Netherlands
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5
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Kim Y, Jahan UM, Deltchev AP, Lavrik N, Reukov V, Minko S. Strategy for Nonenzymatic Harvesting of Cells via Decoupling of Adhesive and Disjoining Domains of Nanostructured Stimulus-Responsive Polymer Films. ACS Appl Mater Interfaces 2023; 15:49012-49021. [PMID: 37824473 PMCID: PMC10614186 DOI: 10.1021/acsami.3c11296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Accepted: 09/28/2023] [Indexed: 10/14/2023]
Abstract
The nanostructured polymer film introduces a novel mechanism of nonenzymatic cell harvesting by decoupling solid cell-adhesive and soft stimulus-responsive cell-disjoining areas on the surface. The key characteristics of this architecture are the decoupling of adhesion from detachment and the impermeability to the integrin protein complex of the adhesive domains. This surface design eliminates inherent limitations of thermoresponsive coatings, namely, the necessity for the precise thickness of the coating, grafting or cross-linking density, and material of the basal substrate. The concept is demonstrated with nanostructured thermoresponsive films made of cell-adhesive epoxy photoresist domains and cell-disjoining poly(N-isopropylacrylamide) brush domains.
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Affiliation(s)
- Yongwook Kim
- Nanostructured
Material Lab, University of Georgia, Athens, Georgia 30602, United States
- Department
of Chemistry, University of Georgia, Athens, Georgia 30602, United States
- Lawrence
Livermore National Lab, Livermore, California 94500, United States
| | - Ummay Mowshome Jahan
- Department
of Textiles, Merchandising, and Interiors, University of Georgia, Athens, Georgia 30602, United States
- Department
of Textile Engineering, Chemistry and Science, North Carolina State University, Raleigh, North Carolina 27606, United States
| | - Alexander Pennef Deltchev
- Nanostructured
Material Lab, University of Georgia, Athens, Georgia 30602, United States
- Department
of Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | - Nickolay Lavrik
- Center
for Nanophase Materials Sciences, Oak Ridge
National Lab, Oak Ridge, Tennessee 37831, United States
| | - Vladimir Reukov
- Department
of Textiles, Merchandising, and Interiors, University of Georgia, Athens, Georgia 30602, United States
| | - Sergiy Minko
- Nanostructured
Material Lab, University of Georgia, Athens, Georgia 30602, United States
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