Gold nanorods as a high-pressure sensor of phase transitions and refractive-index gauge

Runowski, Marcin; Sobczak, Szymon; Marciniak, Jędrzej; Bukalska, Ida; Lis, Stefan; Katrusiak, Andrzej

doi:10.1039/c9nr02792k

Cited by 31 publications

(30 citation statements)

References 74 publications

(58 reference statements)

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“…In addition to their applications in sensing techniques and luminescence enhancements [13][14][15], specifically core−shell nanomaterials with plasmonic materials such as gold, silver, or copper provide extensive employment in surface-enhanced vibrational spectroscopies, especially in SERS [2]. Compared to single metal nanoparticles, core−shell nanoparticles serve extraordinary SERS activities due to their high potential to create unique localized surface plasmon resonance (LSPR).…”

Section: Introductionmentioning

confidence: 99%

Bimetallic Core–Shell Nanoparticles of Gold and Silver via Bioinspired Polydopamine Layer as Surface-Enhanced Raman Spectroscopy (SERS) Platform

Yilmaz

Yılmaz

2020

Nanomaterials

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Despite numerous attempts to fabricate the core–shell nanoparticles, novel, simple, and low-cost approaches are still required to produce these efficient nanosystems. In this study, we propose the synthesis of bimetallic core–shell nanoparticles of gold (AuNP) and silver (AgNP) nanostructures via a bioinspired polydopamine (PDOP) layer and their employment as a surface-enhanced Raman spectroscopy (SERS) platform. Herein, the PDOP layer was used as an interface between nanostructures as well as stabilizing and reducing agents for the deposition of silver ions onto the AuNPs. UV-vis absorption spectra and electron microscope images confirmed the deposition of the silver ions and the formation of core–shell nanoparticles. SERS activity tests indicated that both the PDOP thickness and silver deposition time are the dominant parameters that determine the SERS performances of the proposed core–shell system. In comparison to bare AuNPs, more than three times higher SERS signal intensity was obtained with an enhancement factor of 3.5 × 105.

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Section: Introductionmentioning

confidence: 99%

Bimetallic Core–Shell Nanoparticles of Gold and Silver via Bioinspired Polydopamine Layer as Surface-Enhanced Raman Spectroscopy (SERS) Platform

Yilmaz

Yılmaz

2020

Nanomaterials

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“…Pressure can reduce the size of particles and minimize interparticle spacing which can enhance the quantum confinement effect and interparticle interaction. [13][14][15][16][17] In our previous studies, we have determined that interparticle spacing for electron delocalization of CdSe/ZnS QDs has a greater effect than a decreased size under high-pressure conditions. Based on this result, the interparticle spacing effect for heterostructures under high pressure will be discussed in this article.…”

Section: Introductionmentioning

confidence: 99%

Ultrafast Electron Transfer in Binary Nanoparticle Superlattices under High Pressure

Cheng

Pan

et al. 2021

Physica Rapid Research Ltrs

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The interparticle spacing of a heterostructure is a crucial factor affecting electron transfer (ET) process. Herein, binary nanoparticle superlattices (BNSLs) composed of CdSe/ZnS quantum dots (QDs) and Au nanoclusters (NCs) are prepared. Steady-state and time-resolved spectra illustrate that the ET accelerates as the pressure increases because pressure effectively adjusts the interparticle spacing. The results also demonstrate that the trap state of the CdSe/ZnS QDs affects the ET process of BNSLs.

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“…New information has been gained from highpressure research in structural biology (Fourme et al, 2004) and microbiology (Meersman et al, 2013;Meersman & McMillan, 2014). In the coming years the effects of pressure on the crystal surface will certainly be studied more, which will find applications in sensing devices (Runowski et al, 2019). Another domain of emerging research is processes under dynamically changing pressure (Evans et al, 2007).…”

Section: Discussionmentioning

confidence: 99%

Lab in a DAC – high-pressure crystal chemistry in a diamond-anvil cell

Katrusiak

2019

Acta Crystallogr B Struct Sci Cryst Eng Mater

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The diamond‐anvil cell (DAC) was invented 60 years ago, ushering in a new era for material sciences, extending research into the dimension of pressure. Most structural determinations and chemical research have been conducted at ambient pressure, i.e. the atmospheric pressure on Earth. However, modern experimental techniques are capable of generating pressure and temperature higher than those at the centre of Earth. Such extreme conditions can be used for obtaining unprecedented chemical compounds, but, most importantly, all fundamental phenomena can be viewed and understood from a broader perspective. This knowledge, in turn, is necessary for designing new generations of materials and applications, for example in the pharmaceutical industry or for obtaining super‐hard materials. The high‐pressure chambers in the DAC are already used for a considerable variety of experiments, such as chemical reactions, crystallizations, measurements of electric, dielectric and magnetic properties, transformations of biological materials as well as experiments on living tissue. Undoubtedly, more applications involving elevated pressure will follow. High‐pressure methods become increasingly attractive, because they can reduce the sample volume and compress the intermolecular contacts to values unattainable by other methods, many times stronger than at low temperature. The compressed materials reveal new information about intermolecular interactions and new phases of single‐ and multi‐component compounds can be obtained. At the same time, high‐pressure techniques, and particularly those of X‐ray diffraction using the DAC, have been considerably improved and many innovative developments implemented. Increasingly more equipment of in‐house laboratories, as well as the instrumentation of beamlines at synchrotrons and thermal neutron sources are dedicated to high‐pressure research.

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Gold nanorods as a high-pressure sensor of phase transitions and refractive-index gauge

Abstract: SPR vis-NIR spectroscopy of Au nanorods conveniently detects phase transitions and measures the refractive index under high pressure.

Cited by 31 publications

References 74 publications

Bimetallic Core–Shell Nanoparticles of Gold and Silver via Bioinspired Polydopamine Layer as Surface-Enhanced Raman Spectroscopy (SERS) Platform

Bimetallic Core–Shell Nanoparticles of Gold and Silver via Bioinspired Polydopamine Layer as Surface-Enhanced Raman Spectroscopy (SERS) Platform

Ultrafast Electron Transfer in Binary Nanoparticle Superlattices under High Pressure

Lab in a DAC – high-pressure crystal chemistry in a diamond-anvil cell

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