1
|
Chu C, Wu P, Chen J, Tsou N, Lin Y, Lo Y, Li S, Chang C, Chen B, Tsai C, Chen Y, Liu T, Chen S. Flexible Optogenetic Transducer Device for Remote Neuron Modulation Using Highly Upconversion-Efficient Dendrite-Like Gold Inverse Opaline Structure. Adv Healthc Mater 2022; 11:e2101310. [PMID: 34971080 DOI: 10.1002/adhm.202101310] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 12/10/2021] [Indexed: 01/14/2023]
Abstract
A remote optogenetic device for analyzing freely moving animals has attracted extensive attention in optogenetic engineering. In particular, for peripheral nerve regions, a flexible device is needed to endure the continuous bending movements of these areas. Here, a remote optogenetic optical transducer device made from a gold inverse opaline skeleton grown with a dendrite-like gold nanostructure (D-GIOF) and chemically grafted with upconversion nanoparticles (UCNPs) is developed. This implantable D-GIOF-based transducer device can achieve synergistic interaction of the photonic crystal effect and localized surface plasmon resonance, resulting in considerable UCNP conversion efficiency with a negligible thermal effect under low-intensity 980 nm near-infrared (NIR) light excitation. Furthermore, the D-GIOF-based transducer device exhibits remarkable emission power retention (≈100%) under different bending states, indicating its potential for realizing peripheral nerve stimulation. Finally, the D-GIOF-based transducer device successfully stimulates neuronal activities of the sciatic nerve in mice. This study demonstrates the potential of the implantable device to promote remote NIR stimulation for modulation of neural activity in peripheral nerve regions and provides proof of concept for its in vivo application in optogenetic engineering.
Collapse
Affiliation(s)
- Chao‐Yi Chu
- Department of Materials Science and Engineering National Yang Ming Chiao Tung University Hsinchu 300 Taiwan, ROC
| | - Pu‐Wei Wu
- Department of Materials Science and Engineering National Yang Ming Chiao Tung University Hsinchu 300 Taiwan, ROC
| | - Jung‐Chih Chen
- Department of Electrical and Computer Engineering National Yang Ming Chiao Tung University Hsinchu 300 Taiwan, ROC
- Department of Biological Science and Technology National Yang Ming Chiao Tung University Hsinchu 300 Taiwan, ROC
- Catholic Mercy Hospital Catholic Mercy Medical Foundation Hsinchu 303 Taiwan, ROC
| | - Nien‐Ti Tsou
- Department of Materials Science and Engineering National Yang Ming Chiao Tung University Hsinchu 300 Taiwan, ROC
| | - You‐Yi Lin
- Material and Chemical Research Laboratories Industrial Technology Research Institute Hsinchu 300 Taiwan, ROC
| | - Yu‐Chun Lo
- The Ph.D. Program for Neural Regenerative Medicine College of Medical Science and Technology Taipei Medical University No. 250 Wu‐Xing St. Taipei 110 Taiwan, ROC
| | - Ssu‐Ju Li
- Department of Biomedical Engineering National Yang Ming Chiao Tung University No.155, Sec. 2, Linong St. Taipei 112 Taiwan, ROC
| | - Ching‐Wen Chang
- Department of Biomedical Engineering National Yang Ming Chiao Tung University No.155, Sec. 2, Linong St. Taipei 112 Taiwan, ROC
| | - Bo‐Wei Chen
- Department of Biomedical Engineering National Yang Ming Chiao Tung University No.155, Sec. 2, Linong St. Taipei 112 Taiwan, ROC
| | - Chia‐Lin Tsai
- Department of Materials Science and Engineering National Yang Ming Chiao Tung University Hsinchu 300 Taiwan, ROC
| | - You‐Yin Chen
- The Ph.D. Program for Neural Regenerative Medicine College of Medical Science and Technology Taipei Medical University No. 250 Wu‐Xing St. Taipei 110 Taiwan, ROC
- Department of Biomedical Engineering National Yang Ming Chiao Tung University No.155, Sec. 2, Linong St. Taipei 112 Taiwan, ROC
| | - Ta‐Chung Liu
- Department of Chemical Engineering Stanford University 450 Serra Mall Stanford CA 94305 USA
| | - San‐Yuan Chen
- Department of Materials Science and Engineering National Yang Ming Chiao Tung University Hsinchu 300 Taiwan, ROC
- Frontier Research Center on Fundamental and Applied Sciences of Matters National Tsing Hua University Hsinchu 300 Taiwan, ROC
- School of Dentistry College of Dental Medicine Kaohsiung Medical University Kaohsiung 807 Taiwan, ROC
- Graduate Institute of Biomedical Science China Medical University Taichung 406 Taiwan, ROC
| |
Collapse
|
2
|
Morebodi KB, Reddy L, Letswalo MLA, Balakrishna A, Erasmus LJB, Swart HC, Masiteng PL. Synthesis and investigation of energy transfer mechanism in Sm 3+ and Eu 3+ doped Na 6Mg(SO 4) 4 nanophosphors via solution combustion technique. INORG NANO-MET CHEM 2022. [DOI: 10.1080/24701556.2022.2081196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- K. B. Morebodi
- Department of Physics, University of Johannesburg, Johannesburg, South Africa
| | - L. Reddy
- Department of Physics, University of Johannesburg, Johannesburg, South Africa
| | - M. L. A. Letswalo
- Department of Physics, University of Johannesburg, Johannesburg, South Africa
| | - A. Balakrishna
- Department of Physics, University of Johannesburg, Johannesburg, South Africa
| | - L. J. B. Erasmus
- Department of Physics, University of the Free State, Bloemfontein, South Africa
| | - H. C. Swart
- Department of Physics, University of the Free State, Bloemfontein, South Africa
| | - P. L. Masiteng
- Department of Physics, University of Johannesburg, Johannesburg, South Africa
| |
Collapse
|
3
|
|
4
|
Mahata MK, Koppe T, Kumar K, Hofsäss H, Vetter U. Upconversion photoluminescence of Ho 3+-Yb 3+ doped barium titanate nanocrystallites: Optical tools for structural phase detection and temperature probing. Sci Rep 2020; 10:8775. [PMID: 32472062 PMCID: PMC7260367 DOI: 10.1038/s41598-020-65149-z] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Accepted: 04/27/2020] [Indexed: 12/31/2022] Open
Abstract
Authors have explored the photo-physical properties of Ho3+-Yb3+ doped BaTiO3 nanocrystals and proposed an intuitive method to probe temperature and crystal phase structure of the matrix. Structural phase change of doped crystals was analyzed in terms of their X-ray diffraction, and it was confirmed through second harmonic generation. We give insights on upconversion of energy of light-emission in Ho3+-Yb3+: BaTiO3 nanocrystals upon a 980 nm laser-light excitation and subsequently, the excited state dynamics were studied with the help of dependence of upconversion luminescence on excitation power and measuring-temperature. To understand the nature of occupancies of the Ho3+ ions at the Ti- and Ba-sites, we performed site-selective, time-resolved spectroscopic measurements at various crystal phases. Based on the lifetime analysis, it is inferred that the Ho3+ ions are present at two types of sites in barium titanate lattice. One of those is the 6-coordinated Ti-site of low symmetry, while the other one is the 12-coordinated Ba-site of higher symmetry. The upconversion emission of the nanocrystals are found to be temperature-sensitive (12 to 300 K), indicating possible use as a self-referenced temperature probe. An analysis of the temperature dependent emissions from 5F4 and 5S2 levels of Ho3+ ions, gives a maximum value of temperature sensitivity ~ 0.0095 K−1 at 12 K. Furthermore, we observe a sharp change in the luminescence intensity at ~180 K due to a ferroelectric phase change of the sample. The correlation of upconversion luminescence with the results of X-ray diffraction and second harmonic generation at different crystal phases implies that the frequency upconversion may be used as a probe of structural change of the lattice.
Collapse
Affiliation(s)
- Manoj Kumar Mahata
- Second Institute of Physics, University of Göttingen, Friedrich-Hund-Platz 1, 37077, Göttingen, Germany.
| | - Tristan Koppe
- Second Institute of Physics, University of Göttingen, Friedrich-Hund-Platz 1, 37077, Göttingen, Germany
| | - Kaushal Kumar
- Department of Physics, Indian Institute of Technology (Indian School of Mines), Dhanbad, 826004, India
| | - Hans Hofsäss
- Second Institute of Physics, University of Göttingen, Friedrich-Hund-Platz 1, 37077, Göttingen, Germany
| | - Ulrich Vetter
- Second Institute of Physics, University of Göttingen, Friedrich-Hund-Platz 1, 37077, Göttingen, Germany
| |
Collapse
|
5
|
Structural, optical and photoluminescence properties of Eu doped ZnO thin films prepared by spin coating. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.04.128] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
6
|
Pathak TK, Kumar A, Erasmus LJB, Pandey A, Coetsee E, Swart HC, Kroon RE. Highly efficient infrared to visible up-conversion emission tuning from red to white in Eu/Yb co-doped NaYF 4 phosphor. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 207:23-30. [PMID: 30195182 DOI: 10.1016/j.saa.2018.08.064] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 08/17/2018] [Accepted: 08/30/2018] [Indexed: 06/08/2023]
Abstract
Eu/Yb co-doped NaYF4 phosphors have been synthesized by the combustion method. The Eu doping was fixed and the effect of Yb doping concentration on the structural, morphological and luminescence properties has been investigated. X-ray diffraction analysis revealed that the phosphors consisted of mixed α- and β-phases, but the β-phase was dominant. All elements of the host and dopants, as well as adventitious C, were detected using X-ray photoelectron spectroscopy. The surface morphology showed a microrod-like structure with sharp hexagonal edges. Energy dispersive X-ray spectroscopy spectra proved the formation of the desired materials. The photoluminescence spectra illustrated the optical emission properties of Eu3+ in the red region when excited at 394 nm, while, under the same excitation, Yb3+ ions gave emission at 980 nm. The up-conversion (UC) emission of Eu/Yb co-doped NaYF4 produced a white color at the higher concentration of Yb excited by a 980 nm laser, which was made possible by green emission of Er contamination (from Yb source) and blue emission of Eu2+ ions. The lifetime of the Eu3+ UC luminescence at 615 nm was also affected by the Yb doping concentration. The temperature sensitivity associated with the Er3+ peaks at 520 and 542 nm was assessed as a function of temperature and the maximum of 0.0040 K-1 occurred at 463 K.
Collapse
Affiliation(s)
- Trilok K Pathak
- Department of Physics, University of the Free State, Bloemfontein, South Africa; Department of Physics, TKCOE Teerthanker Mahaveer University, Moradabad, India.
| | - Ashwini Kumar
- Department of Physics, University of the Free State, Bloemfontein, South Africa.
| | - L J B Erasmus
- Department of Physics, University of the Free State, Bloemfontein, South Africa
| | - Anurag Pandey
- Department of Physics, University of the Free State, Bloemfontein, South Africa
| | - E Coetsee
- Department of Physics, University of the Free State, Bloemfontein, South Africa
| | - H C Swart
- Department of Physics, University of the Free State, Bloemfontein, South Africa
| | - R E Kroon
- Department of Physics, University of the Free State, Bloemfontein, South Africa.
| |
Collapse
|