Unger, Gabriel
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Publication Electrical Characterization of Solar Cell using Arduino and Polarization Film(Singh Center for Nanotechnology, 2022-08-24) Lancaster, Mark; Jhamb, Ahana; Song, Xilai; Unger, Gabriel; Youderian, Marissa; Kim, Gyuseok L.A solar cell laboratory course for high school and college undergraduate students is proposed. The electrical characterization of the solar cell is performed to confirm the functionality of the device as both a diode and a power source. The efficiency of the solar cell in the illuminated condition is found to be 13.1 %. We find the efficiency of the solar cell slightly decreases as the intensity of light decreases. However, there is no significant difference in efficiency except for in the opaque condition. A calibrated solar cell, multimeter, current sensor, Arduino, coding and polarization are used to perform the experiment.Publication Exploring Hydrophobic and Lipophilic Properties of Magic Sand: Implications for Oil Spill Cleanup(Singh Center for Nanotechnology) Unger, Gabriel; Song, Ethan; Kim, GyuseokIn this study, we investigate the hydrophobic and lipophilic properties of magic sand by examining the behavior of water and oil droplets on magic sand surfaces. The contact angle between water and magic sand exceeds 120 degrees, indicating hydrophobic behavior, while the contact angle between oil and magic sand is significantly less than 90 degrees, suggesting lipophilic characteristics. To establish a comparative analysis, we performed similar tests using regular sand, demonstrating hydrophilic and lipophilic properties with contact angles against water and oil of less than 90 degrees. Leveraging these divergent properties, we conducted a simulated oil spill cleanup employing magic sand, resulting in a notable reduction of oil levels in water as the magic sand readily absorbed and sank with the oil.Publication MEMS Device Demonstration for High School Students or Nonspecialists(2021-10-28) Kim, Gyuseok L.; Meng, Jeffrey; Unger, GabrielMicro-electromechanical systems (MEMS) devices have many unique advantages, and offer an exciting entrance for students into the field of nanotechnology and nanofabrication. In this article, an educational hands-on laboratory protocol with MEMS devices is proposed. Using a paper airplane, an Arduino, and the MPU 6050 MEMS accelerometer/gyroscope sensor students are able to create a graphical aircraft attitude indicator. The data is then processed on the Arduino, which is connected to a computer. The computer can then run graphics software displaying a digital aircraft attitude indicator showing the roll and pitch of the aircraft live.