Size Dependent Raman Spectra of Bismuth Telluride Nanocrystals Synthesized via a One-Step Wet Chemistry Method

2012 ◽  
Author(s):  
Liangliang Chen ◽  
Qing Zhao ◽  
Xiulin Ruan
Keyword(s):  
Raman Spectra ◽  
Bismuth Telluride ◽  
Wet Chemistry ◽  
Chemistry Method ◽  
Size Dependent ◽  
One Step

scholarly journals Manipulating acoustic and plasmonic modes in gold nanostars

2019 ◽  
Vol 1 (7) ◽  
pp. 2690-2698
Author(s):  
Sharmistha Chatterjee ◽  
Loredana Ricciardi ◽  
Julia I. Deitz ◽  
Robert E. A. Williams ◽  
David W. McComb ◽  
...  
Keyword(s):  
Experimental Evidence ◽  
Wet Chemistry ◽  
Chemistry Method ◽  
Gold Nanostars ◽  
One Step

In this contribution experimental evidence of plasmonic edge modes and acoustic breathing modes in gold nanostars (AuNSs) is reported. AuNSs are synthesized by a surfactant-free, one-step wet-chemistry method.

scholarly journals Solution-Grown Zn/Al Layered Double Hydroxide Nanoplatelets onto Al Thin Films: Fine Control of Position and Lateral Thickness

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
D. Scarpellini ◽  
C. Leonardi ◽  
A. Mattoccia ◽  
L. Di Giamberardino ◽  
P. G. Medaglia ◽  
...  
Keyword(s):  
Layered Double Hydroxide ◽  
Cmos Technology ◽  
Aluminum Film ◽  
Aluminum Layer ◽  
Final Thickness ◽  
Wet Chemistry ◽  
Residual Aluminum ◽  
Fine Control ◽  
One Step ◽  
Double Hydroxide

We have grown nanostructured films of Zn/Al Layered Double Hydroxide (LDH) on different substrates by combining the deposition of an aluminum micropatterned thin layer with a successive one-step room-temperature wet-chemistry process. The resulting LDH film is made of lamellar-like nanoplatelets mainly oriented perpendicular to the substrate. Since the aluminum layer acts as both reactant and seed for the synthesis of the LDH, the growth can be easily confined with submicrometric-level resolution (about ±0.5 μm) by prepatterning the aluminum layer with conventional photolithographic techniques. Moreover, we demonstrate real-time monitoring of the LDH growth process by simply measuring the resistance of the residual aluminum film. If the aluminum layer is thinner than 250 nm, the morphology of LDH nanoplatelets is less regular and their final thickness linearly depends on the initial amount of aluminum. This peculiarity allows accurately controlling the LDH nanoplatelet thickness (with uncertainty of about ±10%) by varying the thickness of the predeposited aluminum film. Since the proposed growth procedure is fully compatible with MEMS/CMOS technology, our results may be useful for the fabrication of micro-/nanodevices.

Stress – Strain Analysis on ZnO Nanostructures Synthesized via Wet Chemistry Method

2015 ◽  
Vol 1112 ◽  
pp. 57-61 ◽  
Author(s):  
Amalia Sholehah ◽  
Akhmad Herman Yuwono
Keyword(s):  
Crystallite Size ◽  
Strain Analysis ◽  
Xrd Analysis ◽  
Heating Process ◽  
Zno Nanostructures ◽  
Stress Strain ◽  
Wet Chemistry ◽  
Chemistry Method ◽  
Hall Method ◽  
Scherrer Equation

In the present work, ZnO nanostructures were synthesized via wet chemistry method. The seeding solution was prepared from zinc nitrate tetrahydrate and hexamethylenetetramine. Prior to the heating process, the seeding solution was immersed in cold bath (0°C). XRD analysis had shown sharp peaks in diffractogram, indicating the high crystallinity of ZnO nanostructures. The crystallite size was determined using Scherrer equation and Williamson-Hall method. Other relevant parameters including stress, strain, and energy density were calculated using Williamson-Hall assuming UDM, UDSM, and UDEDM. The results had revealed that crystallite size calculated with Williamson-Hall method is more accurate than Scherrer equation.

SIZE-DEPENDENT ERRORS IN Z DETERMINATION USING THE HARMAN METHOD

1965 ◽  
Vol 43 (9) ◽  
pp. 1589-1603 ◽  
Author(s):  
C. H. Champness ◽  
P. C. Parekh
Keyword(s):  
Bismuth Telluride ◽  
Figure Of Merit ◽  
Absolute Temperature ◽  
Thermoelectric Figure Of Merit ◽  
Sectional Area ◽  
Thermoelectric Figure ◽  
Cross Sectional ◽  
Harman Method ◽  
Size Dependent ◽  
Current Leads

The effect of sample size on the measured thermoelectric figure of merit (Zm) determined by the Peltier–Seebeck or Harman method has been studied by progressively halving the area (As) and length (ls) of bismuth telluride alloy samples. Measurements were carried out with As values from 1 to 0.01 cm2, la values from 2 to 0.5 cm, and three different gauges of current leads (cross-sectional area Aw). The relative decrease of Zm was found to vary approximately as sech [Formula: see text] with Aw and ls constant, as In Aw with As and ls constant, and as T4/s2 with Aw and As constant, where T is the absolute temperature. The variation with As and Aw appears to be due to conduction along the sample leads, while the variation with ls is well accounted for by radiation to and from the sample. With 40 A.W.G. wires, the error in the measured figure of merit is estimated to be about 5% for a sample of dimensions 0.5 × 0.5 × 1 cm and around 50% for a sample of size 0.1 × 0.1 × 2 cm.

Synthesis and Self-Assembly of Ultrathin NixFe1−x(OH)2 Nanodiscs via a Wet-Chemistry Method

2011 ◽  
Vol 11 (12) ◽  
pp. 11028-11031 ◽  
Author(s):  
Dan Zhou ◽  
Markus Boese ◽  
Rongming Wang ◽  
Hongzhou Zhang
Keyword(s):  
Self Assembly ◽  
Wet Chemistry ◽  
Chemistry Method

Oxygen-defective ZnO porous nanosheets modified by carbon dots to improve their visible-light photocatalytic activity and gain mechanistic insight

2020 ◽  
Vol 44 (26) ◽  
pp. 11215-11223 ◽  
Author(s):  
Feng Guo ◽  
Haoran Sun ◽  
Lei Cheng ◽  
Weilong Shi
Keyword(s):  
Photocatalytic Activity ◽  
Liquid Phase ◽  
Visible Light ◽  
Carbon Dots ◽  
Composite Photocatalyst ◽  
Wet Chemistry ◽  
Mechanistic Insight ◽  
Porous Nanosheets ◽  
One Step ◽  
Visible Light Photocatalytic

A carbon dots/oxygen-defective ZnO (COZ) porous nanosheet composite photocatalyst was prepared via a one-step liquid-phase wet chemistry method for the highly efficient visible-light photocatalytic degradation of tetracycline (TC).

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