Synthesis of anisotropic Au–Cu alloy nanostructures and its application in SERS for detection of methylene blue
Au–Cu alloy nanostructures have been synthesized in aqueous phase through co-reduction of HAuCl _4 .3H _2 O and CuCl _2 .2H _2 O by glucose in presence of hexadecylamine at ∼80 °C. By changing the synthesis conditions, nanostructures of various shapes such as nanowires, multiply twinned tripod, tetr...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2020-01-01
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| Series: | Materials Research Express |
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| Online Access: | https://doi.org/10.1088/2053-1591/ab63c7 |
| _version_ | 1797747076120969216 |
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| author | Manish Kumar Singh Prajwal Chettri Joysurya Basu Ajay Tripathi Bratindranath Mukherjee Archana Tiwari R K Mandal |
| author_facet | Manish Kumar Singh Prajwal Chettri Joysurya Basu Ajay Tripathi Bratindranath Mukherjee Archana Tiwari R K Mandal |
| author_sort | Manish Kumar Singh |
| collection | DOAJ |
| description | Au–Cu alloy nanostructures have been synthesized in aqueous phase through co-reduction of HAuCl _4 .3H _2 O and CuCl _2 .2H _2 O by glucose in presence of hexadecylamine at ∼80 °C. By changing the synthesis conditions, nanostructures of various shapes such as nanowires, multiply twinned tripod, tetrapod, etc were observed. Systematic variation of the synthesis condition not only leads to change in size and particle morphology but also develops various other crystallographic characters in the nanoparticles. Alloying behavior of Au–Cu has been examined through transmission electron microscope operating in its conventional and analytical modes coupled with high resolution phase contrast microscopy. These results suggested that nanostructures are composed of homogeneous Au–Cu alloy. Preferential attachment along {111} and {100} crystallographic facets of Au–Cu alloy nanoparticles led to the formation of nanowires. Multiply twinned branched shape Au–Cu (width of branch ∼30 nm) nanostructures exhibit localized surface plasmon resonance maxima in the near-infrared region. The branched shape Au–Cu alloy nanostructures display better surface enhanced Raman scattering response in the detection of methylene blue as compared to spherical Au nanoparticles. |
| first_indexed | 2024-03-12T15:46:01Z |
| format | Article |
| id | doaj.art-67b81f1170ae49dcae885d1697327511 |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:46:01Z |
| publishDate | 2020-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-67b81f1170ae49dcae885d16973275112023-08-09T15:24:54ZengIOP PublishingMaterials Research Express2053-15912020-01-017101505210.1088/2053-1591/ab63c7Synthesis of anisotropic Au–Cu alloy nanostructures and its application in SERS for detection of methylene blueManish Kumar Singh0https://orcid.org/0000-0001-5004-7809Prajwal Chettri1Joysurya Basu2Ajay Tripathi3Bratindranath Mukherjee4Archana Tiwari5R K Mandal6Department of Metallurgical Engineering, Indian Institute of Technology (BHU), Varanasi-221005, Uttar Pradesh, IndiaDepartment of Physics, School of Physical Sciences, Sikkim University , Gangtok-737102, Sikkim, IndiaDepartment of Metallurgical Engineering, Indian Institute of Technology (BHU), Varanasi-221005, Uttar Pradesh, IndiaDepartment of Physics, School of Physical Sciences, Sikkim University , Gangtok-737102, Sikkim, IndiaDepartment of Metallurgical Engineering, Indian Institute of Technology (BHU), Varanasi-221005, Uttar Pradesh, IndiaDepartment of Physics, School of Physical Sciences, Sikkim University , Gangtok-737102, Sikkim, IndiaDepartment of Metallurgical Engineering, Indian Institute of Technology (BHU), Varanasi-221005, Uttar Pradesh, IndiaAu–Cu alloy nanostructures have been synthesized in aqueous phase through co-reduction of HAuCl _4 .3H _2 O and CuCl _2 .2H _2 O by glucose in presence of hexadecylamine at ∼80 °C. By changing the synthesis conditions, nanostructures of various shapes such as nanowires, multiply twinned tripod, tetrapod, etc were observed. Systematic variation of the synthesis condition not only leads to change in size and particle morphology but also develops various other crystallographic characters in the nanoparticles. Alloying behavior of Au–Cu has been examined through transmission electron microscope operating in its conventional and analytical modes coupled with high resolution phase contrast microscopy. These results suggested that nanostructures are composed of homogeneous Au–Cu alloy. Preferential attachment along {111} and {100} crystallographic facets of Au–Cu alloy nanoparticles led to the formation of nanowires. Multiply twinned branched shape Au–Cu (width of branch ∼30 nm) nanostructures exhibit localized surface plasmon resonance maxima in the near-infrared region. The branched shape Au–Cu alloy nanostructures display better surface enhanced Raman scattering response in the detection of methylene blue as compared to spherical Au nanoparticles.https://doi.org/10.1088/2053-1591/ab63c7multiply twinnednanowiresoriented attachmentlocalized surface plasmon resonancesurface enhanced Raman scattering |
| spellingShingle | Manish Kumar Singh Prajwal Chettri Joysurya Basu Ajay Tripathi Bratindranath Mukherjee Archana Tiwari R K Mandal Synthesis of anisotropic Au–Cu alloy nanostructures and its application in SERS for detection of methylene blue Materials Research Express multiply twinned nanowires oriented attachment localized surface plasmon resonance surface enhanced Raman scattering |
| title | Synthesis of anisotropic Au–Cu alloy nanostructures and its application in SERS for detection of methylene blue |
| title_full | Synthesis of anisotropic Au–Cu alloy nanostructures and its application in SERS for detection of methylene blue |
| title_fullStr | Synthesis of anisotropic Au–Cu alloy nanostructures and its application in SERS for detection of methylene blue |
| title_full_unstemmed | Synthesis of anisotropic Au–Cu alloy nanostructures and its application in SERS for detection of methylene blue |
| title_short | Synthesis of anisotropic Au–Cu alloy nanostructures and its application in SERS for detection of methylene blue |
| title_sort | synthesis of anisotropic au cu alloy nanostructures and its application in sers for detection of methylene blue |
| topic | multiply twinned nanowires oriented attachment localized surface plasmon resonance surface enhanced Raman scattering |
| url | https://doi.org/10.1088/2053-1591/ab63c7 |
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