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Using theoretical and experimental analysis, the study evaluates parallel versus perpendicular dimer configurations and links photothermal behavior to biomedical outcomes, demonstrating photothermal apoptosis of cancerous cells in a mice model. The work frames results within thermoplasmonics and heat-conversion pathways for hyperthermia treatment.",{"@graph":14,"@context":73},[15,34,56],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/document/","Document",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/document/research-report/","Research & 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mechanism enables photothermal manipulation in gold nanorod dimers?","Question",{"text":63,"@type":64},"When two gold nanorods are close enough to interact, collective plasmon modes evolve and near-field enhancement concentrates electromagnetic energy at the interparticle region, producing photothermal effects.","Answer",{"name":66,"@type":61,"acceptedAnswer":67},"How do fringing fields relate to the studied nanorod dimers?",{"text":68,"@type":64},"The fringing field, also described as the 'edge effect,' arises at the edges of the anisotropic nanostructures and is connected to electromagnetic coupling that remains a key unexplored aspect.",{"name":70,"@type":61,"acceptedAnswer":71},"What biomedical outcome is evaluated in the study?",{"text":72,"@type":64},"The study evaluates photothermal apoptosis of cancerous cells using laser heating of gold nanorod dimers in a mice model, supported by both theoretical and experimental 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manipulation of the fringing field in gold nanorod dimers towards the apoptosis of cancerous cells  \nDorothy Bardhan1, Nabanita Maity2, Debarun Sen1, Mahuya Sengupta2 & Sujit Kumar Ghosh3*  \nThe possibility of coherent manipulation of optical and thermal energies in noble metal nanostructures has given birth to an enduring research arena coined by thermoplasmonics. Upon interaction with electromagnetic radiation, the energy of the produced hot electrons in metallic nanostructures is converted into heat and is transferred to the medium as a consequence of numerous relaxation processes. Gold nanorods have, often, been adopted as the classical anisotropic nanostructures owing to excellent shape-selective plasmonic tunability in the vis–NIR region. When a pair of metallic nanostructures are sufficiently close to each other to imbue electromagnetic interaction, there occurs evolution of collective plasmon modes, substantial enhancement of near field and strong squeezing of electromagnetic energy at the interparticle spatial region of the dimeric nanostructures. Recent advances in the ‘tips and tricks’ guide to assembling, even, anisotropic nanostructures in colloidal dispersions have offered the opportunity to interplay with the phenomenological plasmonic and thermal characteristics. The photothermal attributes emerging due to electromagnetic coupling offringing fields have been explored considering parallel and perpendicular configurations of gold nanorod dimers as the prototypical systems from theoretical and experimental perspectives and their biomedical consequences have been realised in a mice model towards the photothermal apoptosis of cancerous cells.  \nSince its ancient usage in 1700 BC where the glowing tip ofa fire drill had been used for breast cancer therapy, the exploration of heat has been borne as an emerging technique towards the hyperthermia treatment of malignant cells1. The conversion of light into heat governed by the law of conservation of energy has attracted enduring research interest that has given birth to the emergence of new subdisciplines recognized as thermoplasmonics2. During the boom of nanotechnology, wide varieties of nanomaterials that offer excellent capabilities of light harvesting and photothermal conversion, have been endowed for exploring fascinating and prospective applications3, ranging from wireless phototherapy4 to photothermal attogram spectroscopy5. Correlated rod-like nanostructures of gold have, often, been chosen as the prototypical anisotropic architectures owing to excellent shape-selective plasmonic characteristics in the vis–NIR region owing to the collective oscillations ofthe free conduction electrons along transverse and longitudinal directions upon interaction with electromagnetic radiation6. Moreover, the ordered arrangement of the nanostructures into numerous plausible statistical assemblies has offered the opportunity to unravel their plasmonic attributes from electromagnetic perspectives and therefore, to design a landscape towards the wide gamut of niche practical applications7. Recent advances in the ‘tips and tricks’guide have extended the opportunity to induce aggregation amongst the rod-like nanostructures, even, in the colloidal dispersion. When a couple of metallic nanorods are proximal to each other sufficient enough to incur electromagnetic interactions, there occurs the evolution of collective plasmon modes, significant enhancement of the near field, and squeezing of light at the interparticle spatial region of the dimeric nanostructures8. The extension of the electric field some distance away at the edges ofthe anisotropic nanostructures is known as the fringing field which has also been coined as the ‘edge effect’ realized in a variety of nanostructures9.  \n1Department of Chemistry, Assam University, Silchar 788011, India. 2Department of Biotechnology, Assam University,","cbCairMkH1OYLYi8","https://ap.wps.com/l/cbCairMkH1OYLYi8","pdf",3427624,11,"English","# Introduction\n## Thermoplasmonics and photothermal conversion\n## Gold nanorods, dimers, and fringing (edge) fields\n# Study aims and approach\n## Photothermal apoptosis in a mice model","[{\"question\":\"What mechanism enables photothermal manipulation in gold nanorod dimers?\",\"answer\":\"When two gold nanorods are close enough to interact, collective plasmon modes evolve and near-field enhancement concentrates electromagnetic energy at the interparticle region, producing photothermal effects.\"},{\"question\":\"How do fringing fields relate to the studied nanorod dimers?\",\"answer\":\"The fringing field, also described as the 'edge effect,' arises at the edges of the anisotropic nanostructures and is connected to electromagnetic coupling that remains a key unexplored aspect.\"},{\"question\":\"What biomedical outcome is evaluated in the study?\",\"answer\":\"The study evaluates photothermal apoptosis of cancerous cells using laser heating of gold nanorod dimers in a mice model, supported by both theoretical and experimental perspectives.\"}]","Photothermal manipulation of the fringing field in gold nanorod dimers towards the apoptosis of cancerous cells | PDF",1789992532,28]