SUKMA, YOLLANDA UTAMI (2023) PEMBUATAN SENSOR ZnO-Ag UNTUK MENGIDENTIFIKASI BERBAGAI JENIS GULA. S1 thesis, Fakultas Teknik Universitas Sultan Ageng Tirtayasa.
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Abstract
Sugar consumption plays an important role in the human body. The World Health Organization (WHO) recommends consuming 5% of your energy intake per day. Excessive consumption of sugar can lead to various chronic diseases, such as diabetes mellitus. Meanwhile, lack of sugar intake can cause brain dysfunction. Therefore, control of sugar intake is very important in the food industry. The problem can be solved by detecting sugar using sensors. One sensor that is often studied is a capacitive sensor based on metal semiconductor material zinc oxide (ZnO) with the addition of silver (Ag). Synthesis of semiconductor thin films was carried out on the surface of polymethylmethacrylate (PMMA) by spray coating and chemical bath deposition (CBD) methods. The spray coating process becomes a seeding stage by spraying the precursor solution onto the substrate with a distance of 5 cm, then the growing stage is carried out by the CBD method. The substrate that has been spray coated will be heated in an oven at 110˚C for 5 hours. The ZnO-Ag semiconductor is then fabricated to form it into a sensor. The sensor performance test is carried out by taking air and aquabides data first for standardization values in the frequency range of 100 kHz - 6 GHz. Furthermore, data was taken with granulated sugar solution, palm sugar solution, Stevia sugar solution, Tropicana sugar solution, and biang sugar solution. The difference in molecular arrangement of each sugar will result in different dielectric permittivity values. The results of sensor performance testing, showing impedance values for air, water, granulated sugar solution, palm sugar solution, stevia sugar solution, Tropicana sugar solution, and biang sugar solution are sequentially 1.26 x 10-1 Ω; 0.79 x 10-1 Ω; 1.02 x 10-1 Ω; 0.90 x 10-1 Ω; 1.10 x 10-1 Ω; 1.52 x 10-1 Ω; and 1. 70 x 10-1 Ω While the capacitance value in air, water, granulated sugar solution, palm sugar solution, Stevia sugar solution, Tropicana sugar solution, and biang sugar solution are respectively 1.30 x 106 pF; 1.63 x 106 pF; 2.53 x 106 pF; 2.85 x 106 pF; 1.46 x 106 pF; 7.40 x 105 pF; and 5.63 x 105 pF. After normalization, the results of the fingerprint pattern on the sugar solution are the most different from the sugar solution by producing absorption peaks in the range of 90 MHz to 105 MHz; 204 MHz to 238 MHz; and forming valleys at 177 MHz to 195 MHz; 245 MHz to 266 MHz. In addition, the Tropicana sugar solution also produced an additional peak at 570 MHz. Unlike inorganic molecules, sugar molecules dissolved in water cannot produce ions because sugar only dissolves as a result of hydrogen bonding. Based on these results, it can be proven that the impedance method can be used to identify the type of sugar based on differences in dielectric properties possessed by sugar. Keywords : Keywords: Capacitive sensor, ZnO-Ag, Impedance, Capacitance, Water, Air, Sugar Solution, Sucrose
| Item Type: | Thesis (S1) | |||||||||
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| Additional Information: | Konsumsi gula memiliki peranan yang penting dalam tubuh manusia. World Health Organization (WHO) menyarankan konsumsi gula sebanyak 5% dari asupan energi per hari. Pengonsumsian gula secara berlebih dapat menimbulkan beragam penyakit kronis, seperti diabetes melitus. Sedangkan kekurangan asupan gula dapat menimbulkan disfungsi kerja otak. Oleh karena itu kontrol asupan gula sangat penting dilakukan dalam industri makanan. Permasalahan tersebut dapat diselesaikan dengan pendeteksian gula menggunakan sensor. Salah satu sensor yang sering kali diteliti yaitu sensor kapasitif berbasis logam material semikonduktor seng oksida (ZnO) dengan penambahan perak (Ag). Sintesis lapisan tipis semikonduktor dilakukan pada permukaan polymethylmethacrylate (PMMA) dengan metode spray coating dan chemcical bath deposition (CBD). Proses spray coating menjadi tahapan seeding dengan menyemprotkan larutan prekusor ke substrat dengan jarak 5 cm, kemudian tahapan growing dilakukan dengan metode CBD. Susbtrat yang telah dilakukan spray coating, akan dipanaskan dalam oven dengan temperatur 110˚C selama 5 jam. Semikonduktor ZnO-Ag selanjutnya difabrikasi untuk membentuknya menjadi sensor. Uji performa sensor dilakukan dengan mengambil data udara dan air aquabides terlebih dahulu untuk nilai standarisasi dalam rentang frekuensi 100 kHz- 6 GHz. Selanjutnya dilakukan pengambilan data dengan larutan gula pasir, larutan gula aren, larutan gula Stevia, larutan gula Tropicana, dan larutan gula biang. Perbedaan susunan molekul yang dimiliki oleh tiap gula akan menghasilkan nilai permitivitas dielektrik yang berbeda. Hasil pengujian performa sensor, menunjukkan nilai impedansi untuk udara, air, larutan gula pasir, larutan gula aren, larutan gula stevia, larutan gula Tropicana, dan larutan gula biang secara berurutan 1,26 x 10-1 Ω ; 0,79 x 10-1 Ω; 1.02 x 10-1 Ω; 0.90 x 10-1 Ω; 1.10 x 10-1 Ω; 1.52 x 10-1 Ω; dan 1.70 x 10-1 Ω Sedangkan nilai kapasitansi pada udara, air larutan gula pasir, larutan gula aren, larutan gula Stevia, larutan gula Tropicana, dan larutan gula biang secara berurutan sebesar 1.30 x 106 pF; 1.63 x 106 pF; 2.53 x 106 pF; 2.85 x 106 pF; 1.46 x 106 pF; 7.40 x 105 pF; dan 5.63 x 105 pF. Setelah dilakukan normalisasi, diperoleh hasil pola sidik jari pada larutan gula biang yang paling berbeda dengan dengan dengan menghasilkan puncak tanda serapan dalam rentang 90 MHz hingga 105 MHz; 204 MHz hingga 238 MHz; dan membentuk lembah pada 177 MHz hingga 195 MHz; 245 MHz hingga 266 MHz. Selain itu, larutan gula Tropicana juga menghasilkan puncak tambahan pada titik 570 MHz. Tidak seperti molekul anorganik, molekul gula yang terlarut dalam air tidak dapat menghasilkan ion karena gula hanya larut akibat dari ikatan hidrogen.. Berdasarkan hasil tersebut, dapat dibuktikan bahwa metode impedansi dapat digunakan untuk mengidentifikasi jenis gula berdasarkan perbedaan sifat dielektrik yang dimiliki oleh gula. Kata Kunci: Sensor kapasitif, ZnO-Ag, Impedansi, Kapasitansi, Air, Udara, Larutan Gula, Sukrosa | |||||||||
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering T Technology > TN Mining engineering. Metallurgy |
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| Divisions: | 03-Fakultas Teknik 03-Fakultas Teknik > 27201-Jurusan Teknik Metalurgi |
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| Depositing User: | Mrs Yollanda Utami Sukma | |||||||||
| Date Deposited: | 17 Oct 2023 13:43 | |||||||||
| Last Modified: | 17 Oct 2023 13:43 | |||||||||
| URI: | http://eprints.untirta.ac.id/id/eprint/30490 |
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