NOVEL APPROACH FOR ONE-POT SELF-ASSEMBLED MONOLAYER PREPARATION OF GOLD TIPPED CdSe/CdS NANORODS

Year 2024, Volume: 25 Issue: 1, 99 - 107, 28.03.2024

Zeynep Dikmen

https://doi.org/10.18038/estubtda.1363791

Abstract

In this study, CdSe/CdS nanorods (NRs) were synthesized via hot injection method to perform simultaneous self-assembly studies with gold tip formation on the nanorods. In this new approach, we propose and demonstrate reductant chemical and gold organosol-free synthesis of gold-tipped nanocrystals on the subphase. Instead of gold organosol usage, gold precursor was prepared by addition of gold source into subphase, and photocatalytic reduction of gold on the tip of nanorods was achieved by exciting the samples under UV-light excitation. Reduction of gold nanoparticles on the tip of NRs was also tried by heating effect, which results in nanopillar formation. The optical properties of these nanorods were determined by spectrophotometric measurements, and gold-tipped nanorods were imaged by TEM analysis. This method enables self-assembly of nanorods and following gold tip formation on the subphase, and it can pave the way to prepare well-defined metal-tipped oriented surfaces that can be used for optical and photocatalysis applications.

Keywords

Gold-tipped nanorod, Self-assembly, CdSe/CdS nanorod

References

• [1] de Mello Donegá C, Liljeroth P, Vanmaekelbergh D. Physicochemical Evaluation of the Hot-Injection Method, a Synthesis Route for Monodisperse Nanocrystals. Small 2005; 1: 1152-1162.
• [2] Hadar I, Hitin GB, Sitt A, Faust A, Banin U. Polarization Properties of Semiconductor Nanorod Heterostructures: From Single Particles to the Ensemble. J. Phys. Chem. Lett. 2013; 4: 502-507.
• [3] Alivisatos AP. Semiconductor Clusters, Nanocrystals, and Quantum Dots. Science (New York, N.Y.) 1996; 271: 933-937.
• [4] Murray CB, Norris DJ, Bawendi MG. Synthesis and characterization of nearly monodisperse CdE (E = sulfur, selenium, tellurium) semiconductor nanocrystallites. J Am Chem Soc 1993; 115: 8706-8715.
• [5] Planelles J, Rajadell F, Climente JI. Electronic Origin of Linearly Polarized Emission in CdSe/CdS Dot-in-Rod Heterostructures. J Phys Chem Lett C 2016; 120: 27724-27730.
• [6] Donegá CdM. Synthesis and properties of colloidal heteronanocrystals. Chem Soc Rev 2011; 40: 1512-1546.
• [7] Dikmen Z. Gold-tipped CdSe/CdZnS colloidal quantum wells as non-quenching plasmonic particles for optical applications. Opt Mater 2024; 147: 114761.
• [8] Sheldon MT, Trudeau P-E, Mokari T, Wang L-W, Alivisatos AP. Enhanced Semiconductor Nanocrystal Conductance via Solution Grown Contacts. Nano Lett 2009; 9: 3676-3682.
• [9] Deka S, Falqui A, Bertoni G, Sangregorio C, Poneti G, Morello G, Giorgi MD, Giannini C, Cingolani R, Manna L, Cozzoli PD. Fluorescent Asymmetrically Cobalt-Tipped CdSe@CdS Core@Shell Nanorod Heterostructures Exhibiting Room-Temperature Ferromagnetic Behavior. J Am Chem Soc 2009; 131: 12817-12828.
• [10] Chakrabortty S, Xing G, Xu Y, Ngiam SW, Mishra N, Sum TC, Chan Y. Engineering Fluorescence in Au-Tipped, CdSe-Seeded CdS Nanoheterostructures. Small 2011; 7: 2847-2852.
• [11] Figuerola A, Franchini IR, Fiore A, Mastria R, Falqui A, Bertoni G, Bals S, Van Tendeloo G, Kudera S, Cingolani R, Manna L. End-to-End Assembly of Shape-Controlled Nanocrystals via a Nanowelding Approach Mediated by Gold Domains. Adv Mater 2009; 21: 550-554.
• [12] Müller J, Lupton JM, Lagoudakis PG, Schindler F, Koeppe R, Rogach AL, Feldmann J, Talapin DV, Weller H. Wave Function Engineering in Elongated Semiconductor Nanocrystals with Heterogeneous Carrier Confinement. Nano Lett 2005; 5: 2044-2049.
• [13] Kraus RM, Lagoudakis PG, Rogach AL, Talapin DV, Weller H, Lupton JM, Feldmann J. Room-Temperature Exciton Storage in Elongated Semiconductor Nanocrystals. Phys Rev Lett 2007; 98: 017401.
• [14] Menagen G, Macdonald JE, Shemesh Y, Popov I, Banin U. Au Growth on Semiconductor Nanorods: Photoinduced versus Thermal Growth Mechanisms. J Am Chem Soc 2009; 131: 17406-17411. [15] Amirav LAlivisatos AP. Photocatalytic Hydrogen Production with Tunable Nanorod Heterostructures. J. Phys. Chem. Lett. 2010; 1: 1051-1054.
• [16] Talapin DV, Shevchenko EV, Murray CB, Kornowski A, Förster S, Weller H. CdSe and CdSe/CdS Nanorod Solids. J Am Chem Soc 2004; 126: 12984-12988.
• [17] Carbone L, Nobile C, De Giorgi M, Sala FD, Morello G, Pompa P, Hytch M, Snoeck E, Fiore A, Franchini IR, et al. Synthesis and Micrometer-Scale Assembly of Colloidal CdSe/CdS Nanorods Prepared by a Seeded Growth Approach. Nano Lett 2007; 7: 2942-2950.
• [18] Dikmen Z, Işık AT, Bozkaya İ, Dehghanpour Baruj H, Canımkurbey B, Shabani F, Ahmad M, Demir HV. Vertically oriented self-assembly of colloidal CdSe/CdZnS quantum wells controlled via hydrophilicity/lipophilicity balance: optical gain of quantum well stacks for amplified spontaneous emission and random lasing. Nanoscale 2023; 15: 9745-9751.
• [19] Hao J, Liu H, Wang K, Sun XW, Delville J-P, Delville M-H. Hole Scavenging and Electron–Hole Pair Photoproduction Rate: Two Mandatory Key Factors to Control Single-Tip Au–CdSe/CdS Nanoheterodimers. ACS Nano 2021; 15: 15328-15341.
• [20] Peng X, Schlamp MC, Kadavanich AV, Alivisatos AP. Epitaxial Growth of Highly Luminescent CdSe/CdS Core/Shell Nanocrystals with Photostability and Electronic Accessibility. J Am Chem Soc 1997; 119: 7019-7029.
• [21] Duan T, Ai J, Cui X, Feng X, Duan Y, Han L, Jiang J, Che S. Spontaneous chiral self-assembly of CdSe@CdS nanorods. Chem 2021; 7: 2695-2707.
• [22] Pietra F, Rabouw FT, van Rhee PG, van Rijssel J, Petukhov AV, Erné BH, Christianen PCM, de Mello Donegá C, Vanmaekelbergh D. Self-Assembled CdSe/CdS Nanorod Sheets Studied in the Bulk Suspension by Magnetic Alignment. ACS Nano 2014; 8: 10486-10495.
• [23] Wang T, Zhuang J, Lynch J, Chen O, Wang Z, Wang X, LaMontagne D, Wu H, Wang Z, Cao YC. Self-Assembled Colloidal Superparticles from Nanorods. Science (New York, N.Y.) 2012; 338: 358-363.
• [24] Zavelani-Rossi M, Krahne R, Della Valle G, Longhi S, Franchini IR, Girardo S, Scotognella F, Pisignano D, Manna L, Lanzani G, Tassone F. Self-assembled CdSe/CdS nanorod micro-lasers fabricated from solution by capillary jet deposition. Laser & Photonics Rev 2012; 6: 678-683.
• [25] Salant A, Amitay-Sadovsky E, Banin U. Directed Self-Assembly of Gold-Tipped CdSe Nanorods. J Am Chem Soc 2006; 128: 10006-10007.
• [26] Zhao N, Liu K, Greener J, Nie Z, Kumacheva E. Close-Packed Superlattices of Side-by-Side Assembled Au-CdSe Nanorods. Nano Lett 2009; 9: 3077-3081.
• [27] Zhao N, Vickery J, Guerin G, Park JI, Winnik MA, Kumacheva E. Self-Assembly of Single-Tip Metal–Semiconductor Nanorods in Selective Solvents. Angew Chem Int Ed Engl 2011; 50: 4606-4610.
• [28] Mokari T, Rothenberg E, Popov I, Costi R, Banin U. Selective Growth of Metal Tips onto Semiconductor Quantum Rods and Tetrapods. Science 2004; 304: 1787-1790.
• [29] Mokari T, Sztrum CG, Salant A, Rabani E, Banin U. Formation of asymmetric one-sided metal-tipped semiconductor nanocrystal dots and rods. Nat Mat 2005; 4: 855-863.