Optimizing the deposition of CdSe colloidal quantum dots on TiO2 film electrode via capping ligand induced self-assembly approach

RSC Advances ◽  
2015 ◽  
Vol 5 (105) ◽  
pp. 86023-86030 ◽  
Author(s):  
Xinxin Meng ◽  
Jun Du ◽  
Hua Zhang ◽  
Xinhua Zhong
Keyword(s):  
Quantum Dots ◽  
Tio2 Film ◽  
Self Assembly ◽  
Colloidal Quantum Dots ◽  
Film Electrode ◽  
Assembly Method ◽  
Experimental Parameters

The influences of experimental parameters in the process of CdSe QD deposition via a capping ligand-induced self-assembly method on the QD loading and the performance of the resultant cell devices have been systematically investigated and optimized.

Synthesis, Characterization, and Self-assembly of Colloidal Quantum Dots

2012 ◽  
pp. 1-37 ◽  
Author(s):  
Saim M. Emin ◽  
Alexandre Loukanov ◽  
Surya P. Singh ◽  
Seiichiro Nakabayashi ◽  
Liyuan Han
Keyword(s):  
Quantum Dots ◽  
Self Assembly ◽  
Colloidal Quantum Dots

Self-Assembly of Colloidal Quantum Dots on the Scaffold of Triblock Copolymer Micelles

2010 ◽  
Vol 2 (11) ◽  
pp. 3160-3169 ◽  
Author(s):  
Mingfeng Wang ◽  
Meng Zhang ◽  
James Li ◽  
Sandeep Kumar ◽  
Gilbert C. Walker ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Self Assembly ◽  
Triblock Copolymer ◽  
Colloidal Quantum Dots ◽  
Copolymer Micelles

Highly Luminescent Glass Films Incorporating Hydrophobic Quantum Dots Prepared by Layer-by-layer Self-assembly Method

2016 ◽  
Vol 45 (1) ◽  
pp. 10-12 ◽  
Author(s):  
Xiaohui Liu ◽  
Jing Han ◽  
Weina Wu ◽  
Qian Shi ◽  
Wei Li ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Self Assembly ◽  
Layer By Layer ◽  
Assembly Method ◽  
Glass Films

Measuring photoluminescence spectra of self-assembly array nanowire of colloidal CdSe quantum dots using scanning near-field optics microscopy

2016 ◽  
Vol 09 (03) ◽  
pp. 1650040 ◽  
Author(s):  
Zhongchen Bai ◽  
Licai Hao ◽  
Zhengping Zhang ◽  
Shuijie Qin
Keyword(s):  
Quantum Dots ◽  
Self Assembly ◽  
Near Field ◽  
Porous Titanium ◽  
Periodic Array ◽  
Main Peak ◽  
Cdse Quantum Dots ◽  
Cdse Qds ◽  
Near Field Optics ◽  
Assembly Method

A novel periodic array CdSe nanowire is prepared on a substrate of the porous titanium dioxide by using a self-assembly method of the colloidal CdSe quantum dots (QDs). The experimental results show that the colloidal CdSe QDs have renewedly assembled on its space scale and direction in process of losing background solvent and form the periodic array nanowire. The main peak wavelength of Photoluminescence (PL) spectra, which is measured by using a 100-nm aperture laser beam spot on a scanning near-field optics microscopy, has shifted 60 nm with compared to the colloidal CdSe QDs. Furthermore, we have measured smaller ordered nanometer structure in thin QDs area as well, a 343-nm periodic nanowire in thick QDs area and the colloidal QDs in edge of well-ordered nanowire.

scholarly journals Silica Nanochannel Array Film Supported by ß-Cyclodextrin-Functionalized Graphene Modified Gold Film Electrode for Sensitive and Direct Electroanalysis of Acetaminophen

2022 ◽  
Vol 9 ◽  
Author(s):  
Huaxu Zhou ◽  
Yao Ding ◽  
Ruobing Su ◽  
Dongming Lu ◽  
Hongliang Tang ◽  
...  
Keyword(s):  
Self Assembly ◽  
Electrochemical Sensors ◽  
Limit Of Detection ◽  
Direct Analysis ◽  
Sensitive Detection ◽  
Film Electrode ◽  
Assembly Method ◽  
Surface Hydroxyls ◽  
Highly Sensitive Detection ◽  
Nanochannel Array

Convenient and sensitive detection of active analytes in complex matrix is crucial in biological, medical, and environmental analysis. Silica nanochannel array film (SNF) equipped electrochemical sensors have shown excellent anti-fouling performance in direct analysis of complex samples. In this work, we demonstrated an electrochemical sensor with anti-fouling performance for highly sensitive detection of acetaminophen (APAP) based on SNF supported by ß-cyclodextrin-graphene (CDG) nanocomposite modified Au film electrode (AuF). Because of their rich surface hydroxyls and 2D lamellar structure, CDG on AuF can serve as the nanoadhesive for compact binding SNF, which can be grown by electrochemical assisted self-assembly method in a few seconds. Attributable to the electrocatalytic property of graphene and the synergistic enrichment from both CD and SNF nanochannels towards analyte, the SNF/CDG/AuF sensor demonstrates sensitive detection of acetaminophen ranged from 0.2 to 50 μM with an ultralow limit-of-detection of 14 nM. Taking advantage of the anti-fouling ability of SNF, the sensor is able to realize accurate and convenient analysis of APAP in commercially available paracetamol tablets.

PbSe quantum dots fiber amplifier based on sol-gel self-assembly method

2010 ◽  
Author(s):  
Xiaolan Sun ◽  
Yanhua Dong ◽  
Chao Li ◽  
Xiaohong Liu ◽  
Guangyao Liu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Self Assembly ◽  
Sol Gel ◽  
Fiber Amplifier ◽  
Assembly Method

scholarly journals Metal free and efficient photoelectrocatalytic removal of organic contaminants over g-C3N4 nanosheet films decorated with carbon quantum dots

RSC Advances ◽  
2017 ◽  
Vol 7 (89) ◽  
pp. 56335-56343 ◽  
Author(s):  
Zisheng Zhang ◽  
Shuanglong Lin ◽  
Xingang Li ◽  
Hong Li ◽  
Wenquan Cui
Keyword(s):  
Quantum Dots ◽  
Self Assembly ◽  
Organic Contaminants ◽  
Carbon Quantum Dots ◽  
Ultrasonic Dispersion ◽  
Composite Photocatalyst ◽  
Metal Free ◽  
Assembly Method ◽  
Semiconductor Photocatalyst

As a typical metal-free semiconductor photocatalyst, a composite photocatalyst comprised of g-C3N4 nanosheets decorated with carbon quantum dots (CQDs/g-C3N4) was synthesized via a simple ultrasonic dispersion self-assembly method.

Effect of Surface Plasmon Resonance on the Photoluminescence from Si Quantum Dot Structures for Third Generation Solar Cell Applications

2012 ◽  
Vol 1391 ◽  
Author(s):  
Supriya Pillai ◽  
Joel J. Hohn ◽  
Craig M. Johnson ◽  
Gavin J. Conibeer
Keyword(s):  
Quantum Dots ◽  
Metal Nanoparticles ◽  
Surface Plasmon ◽  
Self Assembly ◽  
Metal Layer ◽  
Resonance Excitation ◽  
Enhanced Absorption ◽  
Assembly Method ◽  
Low Dimensional ◽  
Silver Metal

ABSTRACTLow dimensional structures like quantum dots (QDs) offers the the ability to tune the absorption properties of standard semiconductor materials. However, QDs are relatively weak light absorbers and hence may benefit significantly from coupling with plasmonic modes in nearby metal structures. In the case of a Si QD absorber layer for photovoltaic applications, enhanced absorption would lead to improved power conversion efficiency. Silver metal nanoparticles (MNPs) were deposited on Si QD structures using the self-assembly method of evaporation and annealing. Room temperature photoluminescence (PL) measurements were used to study the surface plasmon (SP) enhanced emission from the samples. The results were compared to conventional metal back reflectors. Enhanced surface plasmon coupled emission (SPCE) from Si QDs in the vicinity of silver metal nanoparticles (MNPs) is observed with a good correlation between the enhancement and the resonance excitation. Quenching was observed from the same emitter layers placed in close proximity to thin flat silver reflector layers, indicating the importance of the spacer layer between a metal layer and the quantum dots in optimising enhancement. The results have implications for the design of SP-enhanced QD solar cells.

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