Gold Nanoplates for a Localized Surface Plasmon Resonance-Based Boric Acid Sensor
Localized surface plasmon resonance (LSPR) properties of metallic nanostructures, such as gold, are very sensitive to the dielectric environment of the material, which can simply be adjusted by changing its shape and size through modification of the synthesizing process. Thus, these unique propertie...
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MDPI AG
2017-04-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/17/5/947 |
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| author | Marlia Morsin Muhamad Mat Salleh Akrajas Ali Umar Mohd Zainizan Sahdan |
| author_facet | Marlia Morsin Muhamad Mat Salleh Akrajas Ali Umar Mohd Zainizan Sahdan |
| author_sort | Marlia Morsin |
| collection | DOAJ |
| description | Localized surface plasmon resonance (LSPR) properties of metallic nanostructures, such as gold, are very sensitive to the dielectric environment of the material, which can simply be adjusted by changing its shape and size through modification of the synthesizing process. Thus, these unique properties are very promising, particularly for the detection of various types of chemicals, for example boric acid which is a non-permitted preservative employed in food preparations. For the sensing material, gold (Au) nanoplates with a variety of shapes, i.e., triangular, hexagonal, truncated pentagon and flat rod, were prepared using a seed-mediated growth method. The yield of Au nanoplates was estimated to be ca. 63% over all areas of the sensing material. The nanoplates produced two absorption bands, i.e., the transverse surface plasmon resonance (t-SPR) and the longitudinal surface plasmon resonance (l-SPR) at 545 nm and 710 nm, respectively. In the sensing study, these two bands were used to examine the response of gold nanoplates to the presence of boric acid in an aqueous environment. In a typical process, when the sample is immersed into an aqueous solution containing boric acid, these two bands may change their intensity and peak centers as a result of the interaction between the boric acid and the gold nanoplates. The changes in the intensities and peak positions of t-SPR and l-SPR linearly correlated with the change in the boric acid concentration in the solution. |
| first_indexed | 2024-04-14T05:12:07Z |
| format | Article |
| id | doaj.art-d9a194e839164a31bd932a8b2f036c9b |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-14T05:12:07Z |
| publishDate | 2017-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-d9a194e839164a31bd932a8b2f036c9b2022-12-22T02:10:30ZengMDPI AGSensors1424-82202017-04-0117594710.3390/s17050947s17050947Gold Nanoplates for a Localized Surface Plasmon Resonance-Based Boric Acid SensorMarlia Morsin0Muhamad Mat Salleh1Akrajas Ali Umar2Mohd Zainizan Sahdan3Microelectronics & Nanotechnology-Shamsuddin Research Centre (MiNT-SRC), Institute of Integrated Engineering (I2E), Universiti Tun Hussien Onn Malaysia, Batu Pahat, Johor 86400, MalaysiaInstitute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia, Bangi, Selangor 43600, MalaysiaInstitute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia, Bangi, Selangor 43600, MalaysiaMicroelectronics & Nanotechnology-Shamsuddin Research Centre (MiNT-SRC), Institute of Integrated Engineering (I2E), Universiti Tun Hussien Onn Malaysia, Batu Pahat, Johor 86400, MalaysiaLocalized surface plasmon resonance (LSPR) properties of metallic nanostructures, such as gold, are very sensitive to the dielectric environment of the material, which can simply be adjusted by changing its shape and size through modification of the synthesizing process. Thus, these unique properties are very promising, particularly for the detection of various types of chemicals, for example boric acid which is a non-permitted preservative employed in food preparations. For the sensing material, gold (Au) nanoplates with a variety of shapes, i.e., triangular, hexagonal, truncated pentagon and flat rod, were prepared using a seed-mediated growth method. The yield of Au nanoplates was estimated to be ca. 63% over all areas of the sensing material. The nanoplates produced two absorption bands, i.e., the transverse surface plasmon resonance (t-SPR) and the longitudinal surface plasmon resonance (l-SPR) at 545 nm and 710 nm, respectively. In the sensing study, these two bands were used to examine the response of gold nanoplates to the presence of boric acid in an aqueous environment. In a typical process, when the sample is immersed into an aqueous solution containing boric acid, these two bands may change their intensity and peak centers as a result of the interaction between the boric acid and the gold nanoplates. The changes in the intensities and peak positions of t-SPR and l-SPR linearly correlated with the change in the boric acid concentration in the solution.http://www.mdpi.com/1424-8220/17/5/947localized surface plasmon resonanceplasmonic sensorgold nanoparticlesgold nanoplatesboric acid |
| spellingShingle | Marlia Morsin Muhamad Mat Salleh Akrajas Ali Umar Mohd Zainizan Sahdan Gold Nanoplates for a Localized Surface Plasmon Resonance-Based Boric Acid Sensor Sensors localized surface plasmon resonance plasmonic sensor gold nanoparticles gold nanoplates boric acid |
| title | Gold Nanoplates for a Localized Surface Plasmon Resonance-Based Boric Acid Sensor |
| title_full | Gold Nanoplates for a Localized Surface Plasmon Resonance-Based Boric Acid Sensor |
| title_fullStr | Gold Nanoplates for a Localized Surface Plasmon Resonance-Based Boric Acid Sensor |
| title_full_unstemmed | Gold Nanoplates for a Localized Surface Plasmon Resonance-Based Boric Acid Sensor |
| title_short | Gold Nanoplates for a Localized Surface Plasmon Resonance-Based Boric Acid Sensor |
| title_sort | gold nanoplates for a localized surface plasmon resonance based boric acid sensor |
| topic | localized surface plasmon resonance plasmonic sensor gold nanoparticles gold nanoplates boric acid |
| url | http://www.mdpi.com/1424-8220/17/5/947 |
| work_keys_str_mv | AT marliamorsin goldnanoplatesforalocalizedsurfaceplasmonresonancebasedboricacidsensor AT muhamadmatsalleh goldnanoplatesforalocalizedsurfaceplasmonresonancebasedboricacidsensor AT akrajasaliumar goldnanoplatesforalocalizedsurfaceplasmonresonancebasedboricacidsensor AT mohdzainizansahdan goldnanoplatesforalocalizedsurfaceplasmonresonancebasedboricacidsensor |