Page 14 - tech fest 2025 ב״ש חוברת תקצירים

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Evaluation of Parameters Required for Production of a Cu+-Based Gel Formulation for Bacterial Surface Disinfection
ChE-B-03
Inbar Regev; inbarregev98@gmail.com
Advisors: Dr. Oshra Ilan Saphier1, Dr. Magal Saphier2 1SCE - Shamoon College of Engineering, Be’er-Sheva 2Coppter Ltd.
Gel is widely used in medical, cosmetic and skincare applications to enhance ingredient absorption and provide a protective layer. It also serves as a carrier for antibacterial agents like monovalent copper, which is known for its disinfecting properties.
Researchers at SCE developed a Vaseline-based formula that maintains effective monovalent copper ion concentration that led to a patented antibacterial gel. This project evaluated gel composition, copper ion concentrations, salicylic acid, ascorbic acid, viscosity and stability.
Over 20 formulations were tested. The most effective gel, containing aloe vera and copper, exhibited the largest bacterial inhibition radius. The optimal formula included 1% copper glutamate, 5% ascorbic acid, 10% salicylic acid, 0.5% vitamin E, 15.5% shea butter, 2.5% aloe vera extract, 1.5% glycerin, 6% ethanol and 12% iso-propyl myristate.
Keywords: antibacterial gel, bacterial inhibition, gel formulations, monovalent copper
Development of an Electrochemical Sensor Based on the DAN-1,8 Ligand Using the DPN Method for Lead Detection
ChE-B-04
Hila Perez; hilaperez16@gmail.com
Advisors: Prof. Ariela Burg1, Ms. Ron Peretz1 1SCE - Shamoon College of Engineering, Be’er-Sheva
The most common contaminants in water reservoirs are heavy metals, which exhibit high toxicity even at low concentrations. Several methods exist for monitoring these metals, although they have various disadvantages: some are not portable; others lack sufficient accuracy; and some can only detect specific metals.
This project is dedicated to the development of a portable electrochemical sensor using Dip-Pen Nanolithography (DPN) for detecting lead at ppb levels. This method facilitates expatiated identification and requires minimal materials.
Optimal performance was achieved at a pH of 4.9, with a ‘limit of detection’ (LoD) of 0.350 ppb and, with a pattern pitch of 6.6μm, yielding a LoD of 0.156 ppb. These results indicate that the sensor can effectively detect lead in compliance with the regulatory standards in Israel.
Keywords: DPN, heavy metals, lead, LoD, pattern pitch, pH