نانومقیاس

نانومقیاس

ضریب تضعیف جرمی و مدهای فونونی نوری نانوخوشه‌های اکسید گرافن عامل‌دار شده با سیستئین

نوع مقاله : مقاله پژوهشی

نویسندگان
1 گروه فیزیک دانشگاه نیشابور ، نیشابور، ایران
2 دانشکده فیزیک دانشگاه یزد ، صفائیه، بلوار دانشگاه ، یزد، ایران
چکیده
در این پژوهش، نانوخوشه‌های اکسید گرافن با عامل پوششی سیستئین با اندازه ذرات در حدود ۱ نانومتر سنتز و بررسی شدند. طیف‌نگاری گاما نشان داد که این نانوخوشه‌ها دارای ضرایب تضعیف جرمی بالایی در محدوده انرژی‌های مختلف پرتوهای گاما هستند که نشان‌دهنده پتانسیل آن‌ها در کاربردهای حفاظتی اشعه‌های پرانرژی است. بررسی طیف‌سنجی مادون قرمز تبدیل فوریه (FTIR) تأیید کرد که حضور سیستئین منجر به اصلاح خواص شیمیایی نانوخوشه‌ها، از جمله تغییر در پیوندهای موجود و افزایش ترکیب نیتروژن و گوگرد در ساختار گرافنی می‌شود. چنین اصلاحاتی می‌توانند بر روی خواص الکترونیکی و اپتیکی ماده تأثیر بسزایی داشته باشند. علاوه بر این، با استفاده از روش کرامرز-کرونینگ، ضرایب اپتیکی شامل ضریب شکست، ضریب خاموشی و ضریب دی‌الکتریک این نانوخوشه‌ها تعیین شدند. تحلیل دقیق این ضرایب، امکان استخراج مدهای فونونی نوری عرضی (TO) و طولی (LO) را فراهم کرد که به‌ترتیب در cm⁻¹ 1670 و cm⁻¹ 1730 قرار دارند. این نتایج، تأییدکننده تأثیر حضور لیگاند سیستئین بر ساختار الکترونی و اپتیکی نانوخوشه‌های اکسید گرافن است.
کلیدواژه‌ها
موضوعات

عنوان مقاله English

Mass Attenuation Coefficient and Optical Phonon Modes of Cysteine-Functionalized Graphene Oxide Nanoclusters

نویسندگان English

Zahra Dehghani 1
Maryam Asaee 1
Alireza Vejdani Noghreiyan 1
Hakimeh Zare 2
Ahad Amiri 2
1 Department of Physics, University of Neyshabur, Neyshabur
2 Department of Physics, Yazd University, Yazd, Iran
چکیده English

: In this study, graphene oxide nanoclusters with a cysteine-capping agent, having a particle size of approximately 1 nm, were synthesized and analyzed. Gamma-ray spectroscopy revealed that these nanoclusters exhibit high mass attenuation coefficients across different gamma-ray energy ranges, indicating their potential for shielding applications against high-energy radiation. Fourier Transform Infrared (FTIR) spectroscopy confirmed that the presence of cysteine modifies the chemical properties of the nanoclusters, including alterations in existing bonds and an increased incorporation of nitrogen and sulfur within the graphene structure. These modifications can significantly influence the electronic and optical properties of the material. Furthermore, using the Kramers-Kronig method, the optical parameters, including refractive index, extinction coefficient, and dielectric function of these nanoclusters, were determined. A detailed analysis of these coefficients enabled the extraction of transverse optical (TO) and longitudinal optical (LO) phonon modes, which were found at 1670 cm⁻¹ and 1730 cm⁻¹, respectively. These findings confirm the influence of the cysteine ligand on the electronic and optical structure of graphene oxide nanoclusters.

کلیدواژه‌ها English

Nanocluster
Graphene oxide
Cysteine
Mass attenuation coefficients
Kramers-Kronig method
Optical phonon modes
[1] D. Chen, H. Feng, J. Li, “Graphene Oxide: Preparation, Functionalization, and Electrochemical Applications,” Chem. Rev. 112:6027–6053, 2012. doi:10.1021/cr300115g
[2] P. Gozali Balkanloo, K.M. Sharifi, A. Poursattar Marjani, “Graphene quantum dots: synthesis, characterization, and application in wastewater treatment: a review,” Mater. Adv. 4:4272–4293, 2023. doi:10.1039/D3MA00372H
[3] C. Zhao, X. Song, Y. Liu, Y. Fu, L. Ye, N. Wang, F. Wang, L. Li, M. Mohammadniaei, M. Zhang, Q. Zhang, J. Liu, “Synthesis of graphene quantum dots and their applications in drug delivery,” J. Nanobiotechnol. 18:142, 2020. doi:10.1186/s12951-020-00698-z
[4] T. Van Tam, S.H. Hong, W.M. Choi, “Facile synthesis of cysteine-functionalized graphene quantum dots for a fluorescence probe for mercury ions,” RSC Adv. 5:97598–97603, 2015. doi:10.1039/C5RA18495A
[5] A.Z. Sherzad, H. Zare, Z. Shahedi, F. Ostovari, Y. Fazaeli, “One-step preparation and characterization of graphene oxide quantum dots and investigation of the effect of thiourea and ammonia (S,N) on the optical properties of the synthesized quantum dots,” Nanomeghyas 7(3):48–54, 2020 (in Persian).
[6] A. Sherzad, H. Zare, Z. Shahedi, F. Ostovari, Y. Fazaeli, Z. Pourghobadi, “Effect of pH on Optical Properties of Graphene Oxide Quantum Dots,” Int. J. Opt. Photonics 14:135–142, 2020. doi:10.52547/ijop.14.2.135
[7] M.R. Younis, G. He, J. Lin, P. Huang, “Recent Advances on Graphene Quantum Dots for Bioimaging Applications,” Front. Chem. 8:1–25, 2020. doi:10.3389/fchem.2020.00424
[8] G. Muruganandi, M. Saravanan, G. Vinitha, M.B. Jessie Raj, T.C. Sabari Girisun, “Barium borate nanorod decorated reduced graphene oxide for optical power limiting applications,” Opt. Mater. 75:612–618, 2018. doi:10.1016/j.optmat.2017.11.017
[9] S. Bak, D. Kim, H. Lee, “Graphene quantum dots and their possible energy applications: A review,” Curr. Appl. Phys. 16:1192–1201, 2016. doi:10.1016/j.cap.2016.03.026
[10] S. Chung, R.A. Revia, M. Zhang, “Graphene Quantum Dots and Their Applications in Bioimaging, Biosensing, and Therapy,” Adv. Mater. 33, 2021. doi:10.1002/adma.201904362
[11] S.A. Ansari, “Graphene Quantum Dots: Novel Properties and Their Applications for Energy Storage Devices,” Nanomaterials 12:3814, 2022. doi:10.3390/nano12213814
[12] J.A. Van Vechten, T.K. Bergstresser, “Electronic Structures of Semiconductor Alloys,” Phys. Rev. B 1:3351–3358, 1970. doi:10.1103/PhysRevB.1.3351
[13] F. Gervais, B. Piriou, “Temperature dependence of transverse- and longitudinal-optic modes in TiO2 (rutile),” Phys. Rev. B 10:1642–1654, 1974. doi:10.1103/PhysRevB.10.1642
[14] J.A. Ridley, N.A. Zakhleniuk, C.R. Bennett, M. Babiker, D.R. Anderson, “Piezoelectric Scattering in Large-Bandgap Semiconductors and Low-Dimensional Heterostructures,” MRS Proc. 572:507, 1999. doi:10.1557/PROC-572-507
[15] S.P.D., M. Srinivasan, K. Fujiwara, “Understanding the role of non-analytical corrections in phonon transport and thermal conductivity in half-Heusler alloys,” J. Appl. Phys. 137, 2025. doi:10.1063/5.0271643
[16] T. Sohier, M. Gibertini, M. Calandra, F. Mauri, N. Marzari, “Breakdown of Optical Phonons’ Splitting in Two-Dimensional Materials,” Nano Lett. 17:3758–3763, 2017. doi:10.1021/acs.nanolett.7b01090
[17] J. Li, T. Qiao, Q. Wu, Y. Li, W. Du, J. Li, H. Xu, “Observation of the nonanalytic behavior of optical phonons in monolayer hexagonal boron nitride,” Nat. Commun. 15:1938, 2024. doi:10.1038/s41467-024-46229-4
[18] T. Zaki, K.I. Kabel, H. Hassan, “Using modified Pechini method to synthesize α-Al2O3 nanoparticles of high surface area,” Ceram. Int. 38:4861–4866, 2012. doi:10.1016/j.ceramint.2012.02.076
[19] Kramers-Kronig Relations in Optical Materials Research, vol. 110, Springer-Verlag, 2005.
[20] Z. Dehghani, F. Ostovari, S. Sharifi, “A comparison of the crystal structure and optical properties of reduced graphene oxide and aminated graphene nanosheets for optoelectronic device applications,” Optik 274:170551, 2023. doi:10.1016/j.ijleo.2023.170551
[21] National Institute of Standards and Technology (NIST), “XCOM: Photon Cross Sections Database,” Available online.
[22] K. Filak-Mędoń, M. Dąbrowski, A.M. Olszewska, M. Kremzer, “Graphene-based nanocomposites as gamma- and X-ray radiation shield,” Sci. Rep. 14:18998, 2024. doi:10.1038/s41598-024-69628-5
[23] H.M. Rusli, N.A.S. Mohd Sabri, N.A. Abdullah, M.Z.A. Rahman, “Fabrication and evaluation of graphene oxide-enhanced polymer composites for effective radiation shielding in medical applications,” Radiat. Phys. Chem. 239:113331, 2026. doi:10.1016/j.radphyschem.2025.113331
[24] A. Amiri, H. Zare, Y. Fazaeli, Z. Dehghani, M. Eslami-Kalantari, “Investigating the optical and magnetic properties of engineered multifunctional graphene oxide and potential application in medical physics and nonlinear optics,” J. Mol. Struct. 1319:139396, 2025. doi:10.1016/j.molstruc.2024.139396
[25] M. Milenković, J.C. da Silva, S.D. Kovačević, D.V. Jovanović, “Facile Synthesis of L-Cysteine Functionalized Graphene Quantum Dots as a Bioimaging and Photosensitive Agent,” Nanomaterials 11:1879, 2021. doi:10.3390/nano11081879
[26] A. Amiri, H. Zare, Y. Fazaeli, Z. Dehghani, M. Eslami-Kalantari, “Investigations on Synthesis, Structural, Dielectric and Nonlinear Optical Properties of GO@MgFe2O4-TMSP-CdTe QDs for Optoelectronic Devices,” J. Nonlinear Opt. Phys. Mater., 2025. doi:10.1142/S0218863525500122
[27] Z. Dehghani, F. Ostovari, M. Nadafan, “Investigation of the structural, dielectric, and optical properties of MoSe2 nanosheets,” J. Appl. Phys. 1312, 2022. doi:10.1063/5.0088016
[28] A. Amiri, H. Zare, Y. Fazaeli, Z. Dehghani, M. Eslami-Kalantari, “Investigations on synthesis, structural, dielectric and nonlinear optical properties of GO@MgFe2O4-TMSP-CdTe QDs for optoelectronic devices,” J. Nonlinear Opt. Phys. Mater., 2025. doi:10.1142/S0218863525500122
[29] Nurhasmi, E.S. Wibowo, H. Harmami, “Study on optical phonon vibration and gamma ray shielding properties of composite geopolymer fly ash-metal,” Radiat. Phys. Chem. 180:109250, 2021. doi:10.1016/j.radphyschem.2020.109250
[30] S. Lyu, W.R.L. Lambrecht, “First-principles calculations of phonons and Raman and infrared spectra in Cd-IV-N2 compounds,” J. Appl. Phys. 123, 2018. doi:10.1063/1.5030216
دوره 12، شماره 2
تابستان 1404
صفحه 229-239

  • تاریخ دریافت 05 فروردین 1404
  • تاریخ بازنگری 27 مهر 1404
  • تاریخ پذیرش 05 آذر 1404