Nanomanipulation, nanotribology and nanomechanics of Au nanorods in dry and liquid environments using an AFM and depth sensing nanoindenter

Nanoscale ◽  
2014 ◽  
Vol 6 (11) ◽  
pp. 5838-5852 ◽  
Author(s):  
Dave Maharaj ◽  
Bharat Bhushan
Keyword(s):  
Gold Nanorods ◽  
Friction And Wear ◽  
Depth Sensing ◽  
Au Nanorods ◽  
Dry Conditions ◽  
First Time

The effects of gold nanorods on friction and wear in dry conditions and submerged in water were studied using an AFM for the first time.

Multicolor ELISA based on alkaline phosphatase-triggered growth of Au nanorods

The Analyst ◽  
2016 ◽  
Vol 141 (10) ◽  
pp. 2970-2976 ◽  
Author(s):  
Yanyan Li ◽  
Xiaoming Ma ◽  
Zhengming Xu ◽  
Meihua Liu ◽  
Zhenyu Lin ◽  
...  
Keyword(s):  
Alkaline Phosphatase ◽  
Gold Nanorods ◽  
Au Nanorods ◽  
Seed Mediated ◽  
First Time

In this work, seed-mediated synthesis of gold nanorods (AuNRs) is demonstrated for multicolor biosensing for the first time.

scholarly journals Constraining the conformation of peptides with Au nanorods to construct multifunctional therapeutic agents with targeting, imaging, and photothermal abilities

RSC Advances ◽  
2018 ◽  
Vol 8 (47) ◽  
pp. 26517-26522
Author(s):  
Linlin Xie ◽  
Xiaomin Zhi ◽  
Nao Xiao ◽  
Chen-Jie Fang ◽  
Chun-Hua Yan
Keyword(s):  
Aspartic Acid ◽  
Gold Nanorods ◽  
Therapeutic Agents ◽  
Au Nanorods ◽  
Arginine Glycine Aspartic Acid

We demonstrated an easy-to-use strategy to constrain the freedom of an RGD (arginine, glycine, aspartic acid) sequence with gold nanorods.

Green/red pulsed vortex-beam oscillations in all-fiber lasers with visible-resonance gold nanorods

Nanoscale ◽  
2019 ◽  
Vol 11 (34) ◽  
pp. 15991-16000 ◽  
Author(s):  
Jinhai Zou ◽  
Zhe Kang ◽  
Rui Wang ◽  
Hongjian Wang ◽  
Jiaxing Liu ◽  
...  
Keyword(s):  
Solid State ◽  
Gold Nanorods ◽  
Fiber Lasers ◽  
Vortex Beam ◽  
Sted Microscopy ◽  
Visible Wavelength ◽  
Mode Division Multiplexing ◽  
First Time

We demonstrate visible-wavelength all-fiber pulsed vortex lasers for the first time that may serve as attractive alternatives to solid-state vortex lasers for a variety of applications, such as visible mode-division multiplexing and STED microscopy.

scholarly journals Plasmonic photothermal microneedle arrays and single needles for minimally-invasive deep in-skin hyperthermia

2020 ◽  
Vol 8 (25) ◽  
pp. 5425-5433 ◽  
Author(s):  
Álvaro Cárcamo-Martínez ◽  
Brónach Mallon ◽  
Juan Domínguez-Robles ◽  
A. Sara Cordeiro ◽  
Maurizio Celentano ◽  
...  
Keyword(s):  
Minimally Invasive ◽  
Laser Irradiation ◽  
Gold Nanorods ◽  
Near Infrared ◽  
Skin Model ◽  
Thickness Skin ◽  
Microneedle Arrays ◽  
First Time ◽  
Nir Laser ◽  
Deep Hyperthermia

We report, for the first time, crosslinked polymeric microneedle (MN) arrays and single needles (2 mm and 4.5 mm length) coated with gold nanorods (GnRs) to induce deep hyperthermia in a 3 mm-thickness skin model upon near infrared (NIR) laser irradiation.

Plasmon-enhanced electrocatalytic hydrogen/oxygen evolution by Pt/Fe–Au nanorods

2018 ◽  
Vol 6 (17) ◽  
pp. 7364-7369 ◽  
Author(s):  
Xia Guo ◽  
Xiaotong Li ◽  
Shufang Kou ◽  
Xianfeng Yang ◽  
Xi Hu ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Oxygen Evolution ◽  
Surface Plasmon ◽  
Gold Nanorods ◽  
Plasmon Resonance ◽  
Electrocatalytic Activity ◽  
Localized Surface Plasmon Resonance ◽  
Localized Surface Plasmon ◽  
Au Nanorods ◽  
Spr Effect

Plasmonic dumbbell-like gold nanorods were selected as models to further investigate the SPR effect on electrocatalysis. Under the excitation of localized surface plasmon resonance of Pt/Fe–Au gold nanorods, the electrocatalytic activity of this catalyst for HER and OER was well improved.

Cardiovascular changes during underwater static and dynamic breath-hold dives in trained divers

2011 ◽  
Vol 111 (3) ◽  
pp. 673-678 ◽  
Author(s):  
Toni Breskovic ◽  
Lovro Uglesic ◽  
Petra Zubin ◽  
Benjamin Kuch ◽  
Jasenka Kraljevic ◽  
...  
Keyword(s):  
Arterial Oxygen Saturation ◽  
Arterial Oxygen ◽  
Breath Hold ◽  
Limited Information ◽  
Time Dynamic ◽  
Cardiovascular Changes ◽  
Pulse Oxymetry ◽  
Arterial Blood ◽  
Dry Conditions ◽  
First Time

Limited information exists concerning arterial blood pressure (BP) changes in underwater breath-hold diving. Simulated chamber dives to 50 m of freshwater (mfw) reported very high levels of invasive BP in two divers during static apnea (SA), whereas a recent study using a noninvasive subaquatic sphygmomanometer reported unchanged or mildly increased values at 10 m SA dive. In this study we investigated underwater BP changes during not only SA but, for the first time, dynamic apnea (DA) and shortened (SHT) DA in 16 trained breath-hold divers. Measurements included BP (subaquatic sphygmomanometer), ECG, and pulse oxymetry (arterial oxygen saturation, SpO2, and heart rate). BP was measured during dry conditions, at surface fully immersed (SA), and at 2 mfw (DA and SHT DA), whereas ECG and pulse oxymetry were measured continuously. We have found significantly higher mean arterial pressure (MAP) values in SA (∼40%) vs. SHT DA (∼30%). Postapneic recovery of BP was slightly slower after SHT DA. Significantly higher BP gain (mmHg/duration of apnea in s) was found in SHT DA vs. SA. Furthermore, DA attempts resulted in faster desaturation vs. SA. In conclusion, we have found moderate increases in BP during SA, DA, and SHT DA. These cardiovascular changes during immersed SA and DA are in agreement with those reported for dry SA and DA.

Microstructure and Friction Behavior of AISI 52100 and D2 Steels Subjected to Ultrasonic Nanocrystalline Surface Modification (UNSM) Technique at a High Temperature

2016 ◽  
Vol 879 ◽  
pp. 164-168
Author(s):  
Auezhan Amanov ◽  
Jun Hyong Kim ◽  
Young Sik Pyun
Keyword(s):  
Surface Modification ◽  
High Temperature ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Bearing Steel ◽  
Friction Behavior ◽  
Friction And Wear Behavior ◽  
Aisi 52100 ◽  
Before And After ◽  
Dry Conditions

In this study, two different AISI 52100 bearing and D2 tool steels were subjected to ultrasonic nanocrystalline surface modification (UNSM) technique at ambient and high temperature of 500 °C. The objective of this study is to characterize the microstructure and to investigate the effectiveness of UNSM technique on the friction and wear behavior of those steels. The friction and wear behavior of the specimens against AISI52100 bearing steel ball with a diameter of 10 mm was carried out using a micro-tribo tester under dry conditions. The hardness with respect to depth from the top surface was measured using a microhardness. The change in the microstructure of the specimens before and after UNSM treatment was characterized by scanning electron microscopy (SEM). The findings from this preliminary study are expected to be implemented to the bearings and tools to increase the efficiency and performance of the components.

Controlled etching and tapering of Au nanorods using cysteamine

Nanoscale ◽  
2018 ◽  
Vol 10 (35) ◽  
pp. 16830-16838 ◽  
Author(s):  
Brian Szychowski ◽  
Haixu Leng ◽  
Matthew Pelton ◽  
Marie-Christine Daniel
Keyword(s):  
Gold Nanorods ◽  
Silica Coating ◽  
Dual Role ◽  
Au Nanorods

Cysteamine has a concentration-dependent dual-role of ligand and etchant which leads to controlled etching/tapering of gold nanorods with silica coating.

scholarly journals Modulatory effect of ascorbic acid on physiological responses of transported ostrich chicks

2012 ◽  
Vol 79 (1) ◽  
Author(s):  
Minka N. Salka ◽  
Ayo J. Olusegun
Keyword(s):  
Ascorbic Acid ◽  
Treated Group ◽  
Control Group ◽  
Sterile Water ◽  
Road Transportation ◽  
Physiological Variables ◽  
Hot Dry Season ◽  
Dry Conditions ◽  
And Control ◽  
First Time

The aims of this study were to determine the modulating role of ascorbic acid (AA) on rectal temperature (RT), heterophil to lymphocyte (H to L) ratio and aberrant behaviours of ostrich chicks transported by road for 4 h during hot-dry conditions. Twenty ostrich chicks aged 2.5 months, of both sexes and belonging to the Red Neck breed, served as subjects of the study. The chicks were assigned randomly to AA-treated and control groups, consisting of 10 chicks each. The AA-treated group was administered orally with 100 mg/kg body weight of AA dissolved in 5 mL of sterile water 30 min before transportation, whilst the control group was given the equivalent of sterile water only. The thermal load (TL) experienced in the vehicle during transportation fluctuated between 31 °C and 89 °C, as calculated from the ambient temperature and relative humidity. Transportation induced hyperthermia, lymphopenia, heterophilia and aberrant behaviours of pecking, wing fluffing and panting, which were ameliorated by AA administration. The relationships between the TL, journey duration and physiological variables of RT, H to L ratio and aberrant behaviours recorded during transportation were significantly and positively correlated in the control group. In AA-treated group the relationships were not significantly correlated. In conclusion, the results showed for the first time that AA ameliorated the adverse effects of stress caused by road transportation on the aberrant behaviours, RT and H to L ratio of ostrich chicks during the hot-dry season.

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