डहलिया पत्ती अर्क से हरित-संश्लेषित ZnO नैनोकण: संरचनात्मक, प्रकाशीय, वेट्टेबिलिटी एवं तापमान-निर्भर केशिकीय द्रव परिवहन का अध्ययन
DOI:
https://doi.org/10.66346/ev.v3i1.2026.5Keywords:
- ZnO नैनोकण, डहलिया पत्तियाँ, वेट्टेबिलिटी, केशिकीय क्रिया , जल-विकर्षी सतह, जैव-संश्लेषण।
Abstract
सतह रसायन (Surface Chemistry) को अनुकूलित करने हेतु नैनोकण (Nanoparticle) कोटिंग्स पर आधारित अनुसंधान ने हाल के वर्षों में व्यापक ध्यान आकर्षित किया है। नैनोकण कोटिंग्स यांत्रिक, विद्युत, प्रकाशीय तथा अग्निरोधी गुणों में सुधार प्रदान करती हैं, जिसके कारण इनका उपयोग विभिन्न औद्योगिक क्षेत्रों में व्यापक रूप से किया जाता है। इसके अतिरिक्त, इनका उपयोग जल-विकर्षी (Hydrophobic) एवं खरोंच-प्रतिरोधी सतहों के निर्माण में भी किया जाता है। विभिन्न नैनो-सामग्रियों में जिंक ऑक्साइड (ZnO) नैनोकण लगभग 3.3 eV के विस्तृत बैंड गैप के कारण विशेष महत्व रखते हैं और अनेक क्षेत्रों में उपयोग किए जाते हैं। साथ ही, नैनोकण कोटिंग्स लेपित सतहों एवं इंटरफेस की आयु, स्थायित्व तथा यांत्रिक स्थिरता को बढ़ाती हैं। वर्तमान अध्ययन में, डहलिया (Dahlia) पत्तियों के अर्क की सहायता से संश्लेषित ZnO नैनोकणों को 1.15 मिमी बाहरी व्यास वाली काँच की केशिका (Glass Capillary) नलिकाओं की आंतरिक सतह पर लेपित किया गया। इस कोटिंग का उद्देश्य सतह को जल-विकर्षी बनाना तथा केशिकीय क्रिया (Capillarity) पर इसके प्रभाव का अध्ययन करना था। ZnO नैनोकण कोटिंग के केशिकीय व्यवहार पर प्रभाव का मूल्यांकन करने के लिए तीन विभिन्न द्रवों—डी-आयोनाइज्ड जल (DW), मेथेनॉल तथा एथेनॉल—का उपयोग करते हुए तुलनात्मक अध्ययन किया गया। संश्लेषित ZnO नैनोकणों का विश्लेषण फूरियर ट्रांसफॉर्म इन्फ्रारेड (FTIR) स्पेक्ट्रोस्कोपी द्वारा रासायनिक संघटन एवं शुद्धता की जाँच हेतु, एक्स-रे विवर्तन (XRD) द्वारा उनकी क्रिस्टलीय प्रकृति के अध्ययन हेतु, UV–Vis–NIR स्पेक्ट्रोस्कोपी द्वारा प्रकाशीय गुणों एवं बैंड गैप के निर्धारण हेतु तथा स्कैनिंग इलेक्ट्रॉन माइक्रोस्कोपी (SEM) द्वारा सतही संरचना एवं आकृति-विज्ञान के विश्लेषण हेतु किया गया। प्राप्त परिणाम दर्शाते हैं कि जैव-संश्लेषित ZnO नैनोकण कोटिंग्स काँच की सूक्ष्म-नलिकाओं में सतह की वेट्टेबिलिटी (Wettability) को नियंत्रित करने तथा केशिकीय व्यवहार को अनुकूलित करने की महत्वपूर्ण क्षमता रखती हैं।
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