Laser-fabricated superhydrophobic/superhydrophilic surfaces on silicon wafer for terahertz spectroscopic detection of aqueous solutions
Terahertz (THz) spectroscopic detection technology is regarded as an ideal approach for detecting biological substances due to its unique advantages of non-ionization, high penetrability, and fingerprint spectra. However, because of the strong absorption of THz waves by polar molecules, such as wate...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2023-04-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/5.0138450 |
| _version_ | 1797771875199221760 |
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| author | Xikang Zhou Jiajie Wang Hanghang Zhang Xiaopeng Zhou Yiping Han |
| author_facet | Xikang Zhou Jiajie Wang Hanghang Zhang Xiaopeng Zhou Yiping Han |
| author_sort | Xikang Zhou |
| collection | DOAJ |
| description | Terahertz (THz) spectroscopic detection technology is regarded as an ideal approach for detecting biological substances due to its unique advantages of non-ionization, high penetrability, and fingerprint spectra. However, because of the strong absorption of THz waves by polar molecules, such as water, detecting target substances dissolved in water is challenging. We propose a new method of tuning the thickness of an aqueous solution film using a superhydrophobic/superhydrophilic (SHB/SHL) surface to improve the ability to obtain the THz spectral information of hydrated substances. The SHB/SHL surface is fabricated on a silicon wafer by regulating cross-grooved micro-/nano-structures with laser texturing. Droplets of the solution can be fixed in a controlled way in a region on the SHB/SHL surface, and then the thickness of the liquid film can be adjusted to optimize the THz transmission signal. This method for detecting target substances dissolved in water focuses more on the coordination between the thickness of the aqueous solution and the THz intensity than the radiation energy. Furthermore, we detect α-lactose in solutions through different thicknesses of the film, which shows the method to be effective for dilute solutions. |
| first_indexed | 2024-03-12T21:43:54Z |
| format | Article |
| id | doaj.art-fd8fb2ca1b1940b2a334b653808e5251 |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-03-12T21:43:54Z |
| publishDate | 2023-04-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-fd8fb2ca1b1940b2a334b653808e52512023-07-26T14:57:20ZengAIP Publishing LLCAIP Advances2158-32262023-04-01134045320045320-710.1063/5.0138450Laser-fabricated superhydrophobic/superhydrophilic surfaces on silicon wafer for terahertz spectroscopic detection of aqueous solutionsXikang Zhou0Jiajie Wang1Hanghang Zhang2Xiaopeng Zhou3Yiping Han4School of Physics, Xidian University, Xi’an 710071, ChinaSchool of Physics, Xidian University, Xi’an 710071, ChinaSchool of Physics, Xidian University, Xi’an 710071, ChinaCollege of Mechanical and Electrical Engineering, Wenzhou University, Wenzhou 325035, ChinaSchool of Physics, Xidian University, Xi’an 710071, ChinaTerahertz (THz) spectroscopic detection technology is regarded as an ideal approach for detecting biological substances due to its unique advantages of non-ionization, high penetrability, and fingerprint spectra. However, because of the strong absorption of THz waves by polar molecules, such as water, detecting target substances dissolved in water is challenging. We propose a new method of tuning the thickness of an aqueous solution film using a superhydrophobic/superhydrophilic (SHB/SHL) surface to improve the ability to obtain the THz spectral information of hydrated substances. The SHB/SHL surface is fabricated on a silicon wafer by regulating cross-grooved micro-/nano-structures with laser texturing. Droplets of the solution can be fixed in a controlled way in a region on the SHB/SHL surface, and then the thickness of the liquid film can be adjusted to optimize the THz transmission signal. This method for detecting target substances dissolved in water focuses more on the coordination between the thickness of the aqueous solution and the THz intensity than the radiation energy. Furthermore, we detect α-lactose in solutions through different thicknesses of the film, which shows the method to be effective for dilute solutions.http://dx.doi.org/10.1063/5.0138450 |
| spellingShingle | Xikang Zhou Jiajie Wang Hanghang Zhang Xiaopeng Zhou Yiping Han Laser-fabricated superhydrophobic/superhydrophilic surfaces on silicon wafer for terahertz spectroscopic detection of aqueous solutions AIP Advances |
| title | Laser-fabricated superhydrophobic/superhydrophilic surfaces on silicon wafer for terahertz spectroscopic detection of aqueous solutions |
| title_full | Laser-fabricated superhydrophobic/superhydrophilic surfaces on silicon wafer for terahertz spectroscopic detection of aqueous solutions |
| title_fullStr | Laser-fabricated superhydrophobic/superhydrophilic surfaces on silicon wafer for terahertz spectroscopic detection of aqueous solutions |
| title_full_unstemmed | Laser-fabricated superhydrophobic/superhydrophilic surfaces on silicon wafer for terahertz spectroscopic detection of aqueous solutions |
| title_short | Laser-fabricated superhydrophobic/superhydrophilic surfaces on silicon wafer for terahertz spectroscopic detection of aqueous solutions |
| title_sort | laser fabricated superhydrophobic superhydrophilic surfaces on silicon wafer for terahertz spectroscopic detection of aqueous solutions |
| url | http://dx.doi.org/10.1063/5.0138450 |
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