Unique Photothermal Response and Sustained Photothermal Effect of pH-Responsive Gold-Nanoparticle Aggregates

ChemPhysChem ◽  
2012 ◽  
Vol 13 (18) ◽  
pp. 4105-4109 ◽  
Author(s):  
Jutaek Nam ◽  
Hyoseok Nam ◽  
Sungwook Jung ◽  
Sekyu Hwang ◽  
Taejun Wang ◽  
...  
Keyword(s):  
Gold Nanoparticle ◽  
Photothermal Effect ◽  
Ph Responsive ◽  
Effect Of Ph ◽  
Nanoparticle Aggregates

Preparation of controlled gold nanoparticle aggregates using a dendronization strategy

2012 ◽  
Vol 384 (1) ◽  
pp. 10-21 ◽  
Author(s):  
Julieta I. Paez ◽  
Eduardo A. Coronado ◽  
Miriam C. Strumia
Keyword(s):  
Gold Nanoparticle ◽  
Nanoparticle Aggregates

Dynamic motions and architectural changes in DNA supramolecular aggregates visualized via transmission electron microscopy without liquid cells

Nanoscale ◽  
2021 ◽  
Vol 13 (37) ◽  
pp. 15928-15936
Author(s):  
Zhuoyang Lu ◽  
Xiangyang Liu ◽  
Maogang He ◽  
Jiangang Long ◽  
Jiankang Liu
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Ionic Liquids ◽  
Gold Nanoparticle ◽  
Dynamic Processes ◽  
Nanometer Resolution ◽  
Transmission Electron ◽  
Nanoparticle Aggregates ◽  
Supramolecular Aggregates

The nonvolatility and remarkable solvation property of ionic liquids is exploited to image the dynamic processes of DNA supramolecular aggregates and gold nanoparticle aggregates at nanometer resolution in an unsealed manner.

scholarly journals Plasmon-Enhanced Photothermal and Optomechanical Deformations of a Gold Nanoparticle

Nanomaterials ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1881
Author(s):  
Jiunn-Woei Liaw ◽  
Guanting Liu ◽  
Yun-Cheng Ku ◽  
Mao-Kuen Kuo
Keyword(s):  
Gold Nanoparticle ◽  
Liquid Layer ◽  
Viscoelastic Model ◽  
Dynamics Simulation ◽  
Photothermal Effect ◽  
Continuous Heating ◽  
Heating Process ◽  
Elastic Model ◽  
Linearly Polarized ◽  
Quasi Liquid Layer

Plasmon-enhanced photothermal and optomechanical effects on deforming and reshaping a gold nanoparticle (NP) are studied theoretically. A previous paper (Wang and Ding, ACS Nano 13, 32–37, 2019) has shown that a spherical gold nanoparticle (NP) irradiated by a tightly focused laser beam can be deformed into an elongated nanorod (NR) and even chopped in half (a dimer). The mechanism is supposed to be caused by photothermal heating for softening NP associated with optical traction for follow-up deformation. In this paper, our study focuses on deformation induced by Maxwell’s stress provided by a linearly polarized Gaussian beam upon the surface of a thermal-softened NP/NR. We use an elastic model to numerically calculate deformation according to optical traction and a viscoelastic model to theoretically estimate the following creep (elongation) as temperature nears the melting point. Our results indicate that a stretching traction at the two ends of the NP/NR causes elongation and a pinching traction at the middle causes a dent. Hence, a bigger NP can be elongated and then cut into two pieces (a dimer) at the dent due to the optomechanical effect. As the continuous heating process induces premelting of NPs, a quasi-liquid layer is formed first and then an outer liquid layer is induced due to reduction of surface energy, which was predicted by previous works of molecular dynamics simulation. Subsequently, we use the Young–Laplace model to investigate the surface tension effect on the following deformation. This study may provide an insight into utilizing the photothermal effect associated with optomechanical manipulation to tailor gold nanostructures.

Catalytic oxidation of diorganosilanes to 1,1,3,3-tetraorganodisiloxanes with gold nanoparticle assembly at the water–chloroform interface

2019 ◽  
Vol 43 (2) ◽  
pp. 813-819 ◽  
Author(s):  
Ravi Shankar ◽  
Asmita Sharma ◽  
Bhawana Jangir ◽  
Manchal Chaudhary ◽  
Gabriele Kociok-Köhn
Keyword(s):  
Catalytic Activity ◽  
Ambient Temperature ◽  
Catalytic Oxidation ◽  
Gold Nanoparticle ◽  
Photothermal Effect ◽  
Nanoparticle Assembly

The synthesis of 1,1,3,3-tetraorganodisiloxanes from the hydrolytic oxidation of diorganosilanes, RR1SiH2, using AuNPs as an interfacial catalyst is described. This study provides a manifestation of the photothermal effect in enhancing the catalytic activity at ambient temperature.

Metabolizable dopamine-coated gold nanoparticle aggregates: preparation, characteristics, computed tomography imaging, acute toxicity, and metabolism in vivo

2016 ◽  
Vol 4 (6) ◽  
pp. 1090-1099 ◽  
Author(s):  
Yao Yu ◽  
Youshen Wu ◽  
Jiajun Liu ◽  
Ke Li ◽  
Daocheng Wu
Keyword(s):  
Computed Tomography ◽  
Acute Toxicity ◽  
Gold Nanoparticle ◽  
Circulation Time ◽  
Computed Tomography Imaging ◽  
Lower Toxicity ◽  
Tomography Imaging ◽  
Imaging Results ◽  
Nanoparticle Aggregates

We prepared metabolizable MSA AuNPs@DPA aggregates, which exhibit improved CT imaging results, much lower toxicity and much longer circulation time in vivo.

Synergistic effect of pH-responsive wormlike micelles based on a simple amphiphile

Soft Matter ◽  
2016 ◽  
Vol 12 (20) ◽  
pp. 4549-4556 ◽  
Author(s):  
Xuepeng Wu ◽  
Yining Wu ◽  
Shuai Yang ◽  
Mingwei Zhao ◽  
Mingwei Gao ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Wormlike Micelles ◽  
Ph Responsive ◽  
Effect Of Ph

Reversible Generation of Gold Nanoparticle Aggregates with Changeable Interparticle Interactions by UV Photoactivation

Langmuir ◽  
2004 ◽  
Vol 20 (3) ◽  
pp. 575-578 ◽  
Author(s):  
Anjali Pal ◽  
Sujit Kumar Ghosh ◽  
Kunio Esumi ◽  
Tarasankar Pal
Keyword(s):  
Gold Nanoparticle ◽  
Interparticle Interactions ◽  
Nanoparticle Aggregates

pH-Induced Reversible Expansion/Contraction of Gold Nanoparticle Aggregates

Small ◽  
2008 ◽  
Vol 4 (12) ◽  
pp. 2191-2194 ◽  
Author(s):  
Yi Chen ◽  
Chengde Mao
Keyword(s):  
Gold Nanoparticle ◽  
Nanoparticle Aggregates
Sign in / Sign up

Export Citation Format

Share Document