A comprehensive study of cytosine-ZnO interactions: Theoretical and experimental insights

IF 2.8 3区 物理与天体物理 Q2 PHYSICS, CONDENSED MATTER Physica B-condensed Matter Pub Date : 2024-11-12 DOI:10.1016/j.physb.2024.416732
Niyazi Bulut , Serhat Keser , Alexandre Zanchet , Piotr S. Zuchowski , Tankut Ates , İrfan Kilic , Omer Kaygili
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Abstract

This paper presents a comprehensive investigation of the adsorption of cytosine, a DNA base, on ZnO model clusters, specifically Zn2O2, Zn3O3, Zn4O4, Zn6O6, Zn8O8 ring (R) and cubic rocksalt. A density functional theory (DFT) method was used to simulate the adsorption of cytosine on ZnO (C/ZnO) clusters. The B3LYP/LanL2DZ method, which includes a correction for the dispersion contribution, was used. The calculated energy gap (Eg) for cytosine showed a strong dependence on the cluster size, highlighting variations corresponding to the dimensions of the clusters. The proposed physisorption mechanism involves the formation of an N...Zn bond between cytosine and the active Zn site on ZnO. In addition, experimental data, including microscopic and spectroscopic evidence, were integrated to further elucidate the interactions between cytosine and ZnO. A composite of C and ZnO was prepared by the wet chemical method and characterised by SEM, XRD and FT-IR analyses. The interaction of cytosine with ZnO nanoparticles was observed by UV–vis spectroscopy. The experimental results were then compared with those obtained from DFT calculations, taking into account the new insights into the cytosine-ZnO interactions. This comparison provided a holistic understanding of the system.
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细胞核-氧化锌相互作用的综合研究:理论与实验见解
本文全面研究了 DNA 碱基胞嘧啶在 ZnO 模型团簇(特别是 Zn2O2、Zn3O3、Zn4O4、Zn6O6、Zn8O8 环状 (R) 和立方岩盐)上的吸附情况。采用密度泛函理论(DFT)方法模拟了胞嘧啶在氧化锌(C/ZnO)簇上的吸附。使用的是 B3LYP/LanL2DZ 方法,其中包括对分散贡献的修正。计算得出的胞嘧啶能隙(Eg)与团簇尺寸有很大的关系,突出显示了与团簇尺寸相对应的变化。提出的物理吸附机制涉及胞嘧啶与氧化锌上的活性锌位点之间形成 N...Zn 键。此外,还综合了包括显微镜和光谱证据在内的实验数据,进一步阐明了胞嘧啶和氧化锌之间的相互作用。采用湿化学方法制备了胞嘧啶和氧化锌的复合材料,并通过扫描电镜、X射线衍射和傅立叶变换红外分析对其进行了表征。通过紫外可见光谱观察了胞嘧啶与氧化锌纳米粒子的相互作用。然后将实验结果与 DFT 计算结果进行比较,同时考虑到对胞嘧啶-氧化锌相互作用的新认识。这种比较提供了对该系统的整体理解。
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来源期刊
Physica B-condensed Matter
Physica B-condensed Matter 物理-物理:凝聚态物理
CiteScore
4.90
自引率
7.10%
发文量
703
审稿时长
44 days
期刊介绍: Physica B: Condensed Matter comprises all condensed matter and material physics that involve theoretical, computational and experimental work. Papers should contain further developments and a proper discussion on the physics of experimental or theoretical results in one of the following areas: -Magnetism -Materials physics -Nanostructures and nanomaterials -Optics and optical materials -Quantum materials -Semiconductors -Strongly correlated systems -Superconductivity -Surfaces and interfaces
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