1
|
Sakamoto M, Terada S, Mizutani T, Saitow KI. Large Field Enhancement of Nanocoral Structures on Porous Si Synthesized from Rice Husks. ACS APPLIED MATERIALS & INTERFACES 2021; 13:1105-1113. [PMID: 33332080 DOI: 10.1021/acsami.0c14248] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Silicon (Si) is a highly abundant, environmentally benign, and durable material and is the most popular semiconductor material; and it is used for the field enhancement of dielectric materials. Porous Si (PSi) exhibits high functionality due to its specific structure. However, the field enhancement of PSi has not been clarified sufficiently. Herein, we present the field enhancement of PSi by the fluorescence intensity enhancement of a dye molecule. The raw material used for producing PSi was rice husk, a biomass material. A nanocoral structure, consisting of spheroidal structures on the surface of PSi, was observed when PSi was subjected to chemical processes and pulsed laser melting, and it demonstrated large field enhancement with an enhancement factor (EF) of up to 545. Confocal microscopy was used for EF mapping of samples before and after laser melting, and the maps were superimposed on nanoscale scanning electron microscope images to highlight the EF effect as a function of microstructure. Nanocoral Si with high EF values were also evaluated by analyzing the porosity from gas adsorption measurements. Nanocoral Si was responsible for the high EF, according to thermodynamic calculations and agreement between experimental and calculation results as determined by Mie scattering theory.
Collapse
Affiliation(s)
- Masanori Sakamoto
- Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Shiho Terada
- Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Tomoya Mizutani
- Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Ken-Ichi Saitow
- Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
- Natural Science Center for Basic Research and Development (N-BARD), Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
- Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| |
Collapse
|
2
|
Biomimetic Nanopillar-Based Biosensor for Label-Free Detection of Influenza A Virus. BIOCHIP JOURNAL 2021; 15:260-267. [PMID: 34122741 PMCID: PMC8184868 DOI: 10.1007/s13206-021-00027-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 05/12/2021] [Accepted: 05/17/2021] [Indexed: 02/08/2023]
Abstract
Since the first emergence of influenza viruses, they have caused the flu seasonally worldwide. Precise detection of influenza viruses is required to prevent the spreading of the disease. Herein, we developed an optical biosensor using peptide-immobilized nanopillar structures for the label-free detection of influenza viruses. The spin-on-glass nanopillar structures were fabricated by nanoimprint lithography. A sialic acid-mimic peptide, which can specifically bind to hemagglutinin on the surface of the influenza virus, was immobilized onto the nanopillars via polymerized dopamine. The constructed nanopillar sensor enabled us to detect influenza A viruses in the range of 103-105 plaque-forming units through simple measurements of reflectance. Our findings suggest that biomimetic modification of nanopillar structures can be an alternative method for the immunodiagnosis of influenza viruses.
Collapse
|
3
|
Lincoln D, Charlton JJ, Hatab NA, Skyberg B, Lavrik NV, Kravchenko II, Bradshaw JA, Sepaniak MJ. Surface Modification of Silicon Pillar Arrays To Enhance Fluorescence Detection of Uranium and DNA. ACS OMEGA 2017; 2:7313-7319. [PMID: 30023546 PMCID: PMC6045356 DOI: 10.1021/acsomega.7b00912] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Accepted: 10/18/2017] [Indexed: 06/08/2023]
Abstract
There is an ever-growing need for detection methods that are both sensitive and efficient, such that reagent and sample consumption is minimized. Nanopillar arrays offer an attractive option to fill this need by virtue of their small scale in conjunction with their field enhancement intensity gains. This work investigates the use of nanopillar substrates for the detection of the uranyl ion and DNA, two analytes unalike but for their low quantum efficiencies combined with the need for high-throughput analyses. Herein, the adaptability of these platforms was explored, as methods for the successful surface immobilization of both analytes were developed and compared, resulting in a limit of detection for the uranyl ion of less than 1 ppm with a 0.2 μL sample volume. Moreover, differentiation between single-stranded and double-stranded DNA was possible, including qualitative identification between double-stranded DNA and DNA of the same sequence, but with a 10-base-pair mismatch.
Collapse
Affiliation(s)
- Danielle
R. Lincoln
- Department
of Chemistry, The University of Tennessee
Knoxville, 552 Buehler
Hall, 1420 Circle Dr., Knoxville, Tennessee 37996, United States
| | - Jennifer J. Charlton
- Department
of Chemistry, The University of Tennessee
Knoxville, 552 Buehler
Hall, 1420 Circle Dr., Knoxville, Tennessee 37996, United States
| | - Nahla A. Hatab
- Department
of Chemistry, The University of Tennessee
Knoxville, 552 Buehler
Hall, 1420 Circle Dr., Knoxville, Tennessee 37996, United States
| | - Brittany Skyberg
- Department
of Chemistry, The University of Tennessee
Knoxville, 552 Buehler
Hall, 1420 Circle Dr., Knoxville, Tennessee 37996, United States
| | - Nickolay V. Lavrik
- The
Center for Nanophase Material Sciences, Oak Ridge National Laboratory, P.O.
Box 2008, Oak Ridge, Tennessee 37830, United States
| | - Ivan I. Kravchenko
- The
Center for Nanophase Material Sciences, Oak Ridge National Laboratory, P.O.
Box 2008, Oak Ridge, Tennessee 37830, United States
| | - James A. Bradshaw
- Y-12
National Security Complex, Oak Ridge Metrology Organization, P.O. Box 2009, Oak Ridge, Tennessee 37830, United States
| | - Michael J. Sepaniak
- Department
of Chemistry, The University of Tennessee
Knoxville, 552 Buehler
Hall, 1420 Circle Dr., Knoxville, Tennessee 37996, United States
| |
Collapse
|
4
|
Crane NA, Lavrik NV, Sepaniak MJ. Manipulating the inter pillar gap in pillar array ultra-thin layer planar chromatography platforms. Analyst 2016; 141:1239-45. [DOI: 10.1039/c5an02274f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An advantage of separation platforms based on deterministic micro- and nano-fabrications, relative to traditional systems based on packed beds of particles, is the exquisite control of all morphological parameters.
Collapse
Affiliation(s)
| | - Nickolay V. Lavrik
- Center for Nanophase Materials Sciences
- Oak Ridge National Laboratory
- Oak Ridge
- USA
| | | |
Collapse
|