PEMBUATAN LAPISAN TIPIS KAWAT NANO PERAK (AgNWs) PADA SUBSTRAT KACA DENGAN METODE SPIN COATING

NI`MATUL AZIZAH, Dr. Eng. Kuwat Triyana, M.Si.

2016 | Skripsi | S1 FISIKA

Lapisan tipis kawat nano perak atau silver nanowires (AgNWs) telah berhasil dibuat dengan variasi konsentrasi AgNWs menggunakan metode spin coating. Konsentrasi AgNWs yang digunakan, yaitu: 8%, 10%, 15%, dan 20% dalam pelarut alkohol. Pada penelitian ini, pembuatan lapisan tipis AgNWs dilakukan dengan kecepatan spin 1000 rpm selama 30 detik di atas substrat kaca kemudian dipanaskan di atas hotplate pada suhu konstan 95 oC selama 15 menit. Berdasarkan foto scanning electron microscopy (SEM), semakin tinggi konsentrasi AgNWs maka kandungan AgNWs pada lapisan tipis semakin tinggi dan menghasilkan morfologi dengan struktur AgNWs forest-like dimana AgNWs saling menumpuk dan tidak teratur. Hasil karakterisasi menggunakan four-point probe (FPP) dan spektrofotometer UV-Vis juga menunjukkan bahwa semakin tinggi konsentrasi AgNWs, resistansi lembar dan transmitansi lapisan tipis AgNWs semakin rendah. Dari karakterisasi yang telah dilakukan diketahui bahwa sampel S10 merupakan sampel lapisan tipis AgNWs yang paling baik dengan konsentrasi AgNWs sebesar 10%. Sampel S10 menghasilkan morfologi dengan sebaran AgNWs yang cukup rata, nilai resistansi lembar rendah sebesar 3,3 �/sq dan transmitansi sebesar 86,6% di daerah cahaya tampak serta diameter dan panjang rata-rata AgNWs masing-masing sebesar (178 ± 45) nm dan (12 ± 3) µm.

Silver nanowires (AgNWs) thin films have been successfully fabricated with different concentration of AgNWs using a spin-coating method. The concentration of AgNWs used by 8%, 10%, 15%, and 20% in alcohol. In this study, the AgNWs thin films were spin-coated at 1000 rpm for 30 seconds on the glass substrates and heated at a constant temperature hotplate of 95 oC for 15 minutes. From the scanning electron microscopy (SEM) images, it shows that the higher concentration of AgNWs was obtained in increasing AgNWs content in the film and produced a morphology with forest-like AgNWs structure which has the random shape and overlapped AgNWs. Furthermore, from the four-point probe (FPP) and UV-Vis spectrophotometer characterization, it shows that the higher concentration of AgNWs results in lower sheet resistance and transmittance of AgNWs thin film. The result of the characterization showed that the S10 sample was the best AgNWs thin film sample with the AgNWs concentration of 10%. The S10 sample has obtained a morphology with a fairly tight distribution of AgNWs, the low sheet resistance of 3.3 �/sq and transmittance of 86.6% in the visible region with the average diameter and length were (178 ± 45) nm and (12 ± 3) µm, respectively.

Kata Kunci : AgNWs, spin coating, four-point probe, SEM