scholarly journals Patterning of Quantum Dots by Dip-Pen and Polymer Pen Nanolithography

2015 ◽  
Vol 2 (1) ◽  
Author(s):  
Soma Biswas ◽  
Falko Brinkmann ◽  
Michael Hirtz ◽  
Harald Fuchs
Keyword(s):  
Quantum Dots ◽  
Large Area ◽  
Pattern Design ◽  
Contact Printing ◽  
Polymer Pen Lithography ◽  
Intermediate Pattern ◽  
Dip Pen Nanolithography

AbstractWe present a direct way of patterning CdSe/ ZnS quantum dots by dip-pen nanolithography and polymer pen lithography. Mixtures of cholesterol and phospholipid 1,2-dioleoyl-sn-glycero-3 phosphocholine serve as biocompatible carrier inks to facilitate the transfer of quantum dots from the tips to the surface during lithography. While dip-pen nanolithography of quantum dots can be used to achieve higher resolution and smaller pattern features (approximately 1 μm), polymer pen lithography is able to address intermediate pattern scales in the low micrometre range. This allows us to combine the advantages of micro contact printing in large area and massive parallel patterning, with the added flexibility in pattern design inherent in the DPN technique.

scholarly journals Writing Behavior of Phospholipids in Polymer Pen Lithography (PPL) for Bioactive Micropatterns

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 891 ◽  
Author(s):  
Alessandro Angelin ◽  
Uwe Bog ◽  
Ravi Kumar ◽  
Christof M. Niemeyer ◽  
Michael Hirtz
Keyword(s):  
Lipid Bilayers ◽  
Systematic Study ◽  
Cell Activation ◽  
Mast Cell Activation ◽  
Direct Write ◽  
Lipid Transfer ◽  
Large Area ◽  
Glass Substrates ◽  
Polymer Pen Lithography ◽  
And Control

Lipid-based membranes play crucial roles in regulating the interface between cells and their external environment, the communication within cells, and cellular sensing. To study these important processes, various lipid-based artificial membrane models have been developed in recent years and, indeed, large-area arrays of supported lipid bilayers suit the needs of many of these studies remarkably well. Here, the direct-write scanning probe lithography technique called polymer pen lithography (PPL) was used as a tool for the creation of lipid micropatterns over large areas via polymer-stamp-mediated transfer of lipid-containing inks onto glass substrates. In order to better understand and control the lipid transfer in PPL, we conducted a systematic study of the influence of dwell time (i.e., duration of contact between tip and sample), humidity, and printing pressure on the outcome of PPL with phospholipids and discuss results in comparison to the more often studied dip-pen nanolithography with phospholipids. This is the first systematic study in phospholipid printing with PPL. Biocompatibility of the obtained substrates with up to two different ink compositions was demonstrated. The patterns are suitable to serve as a platform for mast cell activation experiments.

Soft Lithography Fabrication of Fully Flexible and Transparent all Organic FETs for Large Area Applications

2006 ◽  
Vol 965 ◽  
Author(s):  
Piero Cosseddu ◽  
Emanuele Orgiu ◽  
Annalisa Bonfiglio
Keyword(s):  
Active Layer ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Large Area ◽  
Semiconductor Interface ◽  
Contact Printing ◽  
Bottom Contact ◽  
Contact Devices ◽  
Top Contact ◽  
Capacitance Effects

ABSTRACTFully flexible and transparent all organic field effect transistors were fabricated by means of an innovative and inexpensive technique. A 1.8μm thick polyethylenetetherephtalate sheet, Mylar® (Du Pont), was used as gate dielectric and at the same time as mechanical support for the whole structure. We used pentacene, deposited by thermal sublimation, as semiconducting layer, whereas poly(ethylene-dioxythiophene)/polystyrene sulfonate (PEDOT/PSS) was used for the realization of the electrodes. Gate electrodes were realized by spin coating, while source and drain electrodes were patterned by micro-contact printing. We fabricated typical p-type field effect transistors, with mobilities up to 2 × 10−1cm2/Vs and Ion/Ioff up to 105, in a very simple and inexpensive way. It is worth to note that this technique allows the realization of bottom contact and top contact transistors. We realized both bottom contact and top contact devices on the same substrate and with the same active layer and we investigated how the structure itself and the active layer morphology influence the electrical properties in terms of hole mobility, Series Contact Resistance and parasitic capacitance effects. The comparison between top-contact and bottom-contact devices shows interesting marked differences that can be mainly attributed to a different PEDOT:PSS/semiconductor interface quality, influencing the most meaningful parameters. The flexibility of the obtained structure and the easy scalability of the technological process, suitable for roll to roll mass production processes, open the way for economic production of high-resolution organic devices

Large area nano-patterning /writing on gold substrate using dip – pen nanolithography (DPN)

2014 ◽  
Author(s):  
Sudhir Kumar Saini ◽  
Amit Vishwakarma ◽  
Pankaj B. Agarwal ◽  
Bala Pesala ◽  
Ajay Agarwal
Keyword(s):  
Gold Substrate ◽  
Large Area ◽  
Nano Patterning ◽  
Dip Pen Nanolithography

Perovskite quantum dots integrated in large-area luminescent solar concentrators

Nano Energy ◽  
2017 ◽  
Vol 37 ◽  
pp. 214-223 ◽  
Author(s):  
Haiguang Zhao ◽  
Yufeng Zhou ◽  
Daniele Benetti ◽  
Dongling Ma ◽  
Federico Rosei
Keyword(s):  
Quantum Dots ◽  
Large Area ◽  
Solar Concentrators ◽  
Luminescent Solar Concentrators ◽  
Perovskite Quantum Dots

Design and Implementation of Colloidal Quantum Dot Field-Effect Transistors

2014 ◽  
Vol 668-669 ◽  
pp. 818-821
Author(s):  
Hai Yan Wang ◽  
Ya Ting Zhang ◽  
Xiao Xian Song ◽  
Lu Fan Jin ◽  
Hai Tao Dai ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Field Effect Transistors ◽  
Low Cost ◽  
Structure Design ◽  
Layer By Layer ◽  
Gate Bias ◽  
Large Area ◽  
Photoconductive Detectors ◽  
Pbs Quantum Dots

With the breakthrough of mobility in quantum dot electric field transistors (Q-EFTs), the potential application in these functional devices has revealed and been paid more attentions, due to flexibility in design, low cost, facility for processing and large area. One of the most important applications of FETs is the photoconductive detector. However, these functional FETs have less been reported. In this work, colloidal PbS Q-FETs were successfully fabricated by reasonable structure design and layer-by-layer depositon technique PbS quantum-dots. The bipolar property was demonstrated by the output and transfer characteristics, as devices work in I and III quadrants simultaneously. The mobilities of electron and hole are 0.16 cm2/(V⋅s) and 0.28 cm2/(V⋅s), respectively. Q-FETs work as photoconductive detectors at both positive and negative gate bias voltages. Under constant gate bias, photocurrent increase exponentially with the intensity of light. The responding region consisted with the absorption range of PbS quantum dots. A linearity was found in drain voltage and incidence of laser power, the ratio was attributing to 0.0019 (μW⋅V)-1.

Undamaged depositing large-area ZnO quantum dots/RGO films on photoelectrodes for the construction of pure Z-scheme

2019 ◽  
Vol 356 ◽  
pp. 781-790 ◽  
Author(s):  
Zhengbo Jiao ◽  
Xianggang Guan ◽  
Min Wang ◽  
Qiming Wang ◽  
Binghui Xu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Large Area ◽  
Zno Quantum Dots

scholarly journals Development of a highly controlled system for large-area, directional printing of quasi-1D nanomaterials

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Adamos Christou ◽  
Fengyuan Liu ◽  
Ravinder Dahiya
Keyword(s):  
High Performance ◽  
Large Scale ◽  
Low Cost ◽  
Large Area ◽  
Sem Images ◽  
Contact Printing ◽  
Controlled System ◽  
Printing System ◽  
Sliding Distance ◽  
Novel Design

AbstractPrinting is a promising method for the large-scale, high-throughput, and low-cost fabrication of electronics. Specifically, the contact printing approach shows great potential for realizing high-performance electronics with aligned quasi-1D materials. Despite being known for more than a decade, reports on a precisely controlled system to carry out contact printing are rare and printed nanowires (NWs) suffer from issues such as location-to-location and batch-to-batch variations. To address this problem, we present here a novel design for a tailor-made contact printing system with highly accurate control of printing parameters (applied force: 0–6 N ± 0.3%, sliding velocity: 0–200 mm/s, sliding distance: 0–100 mm) to enable the uniform printing of nanowires (NWs) aligned along 93% of the large printed area (1 cm2). The system employs self-leveling platforms to achieve optimal alignment between substrates, whereas the fully automated process minimizes human-induced variation. The printing dynamics of the developed system are explored on both rigid and flexible substrates. The uniformity in printing is carefully examined by a series of scanning electron microscopy (SEM) images and by fabricating a 5 × 5 array of NW-based photodetectors. This work will pave the way for the future realization of highly uniform, large-area electronics based on printed NWs.

scholarly journals Microscale Patterning of Electrochromic Polymer Films via Soft Lithography

2018 ◽  
Vol 2018 ◽  
pp. 1-8
Author(s):  
Jae-Yeong Jung ◽  
Seokwon Joo ◽  
Da-Seul Kim ◽  
Kyoung-Hwan Kim ◽  
Tae Soup Shim ◽  
...  
Keyword(s):  
Soft Lithography ◽  
Direct Contact ◽  
Fabrication Technique ◽  
Large Area ◽  
Experimental Conditions ◽  
Contact Printing ◽  
Negative Patterning ◽  
Direct Fabrication ◽  
Electrochromic Polymer ◽  
Positive Patterning

We present a direct fabrication technique of patterned polymeric electrochromic (EC) devices via soft lithography, enabling both negative patterning and positive patterning of the polymer. For this work, elastomeric polydimethylsiloxane (PDMS) molds were employed as not only stamps for direct contact printing of polymer inks but also templates for dewetting of polymer solutions under mild experimental conditions. We performed both negative patterning and positive patterning of a prototypical EC polymer and investigated the EC device characteristics according to solvents, solution concentrations, and pattern types. Eventually, the complex patterns, which cannot be realized by conventional shadow masking processes, and large-area structures were successfully demonstrated. We anticipate that these results will be applied to the development of various patterned devices and circuits, which may lead to further applications.

scholarly journals Highly Modular Protein Micropatterning Sheds Light on the Role of Clathrin-Mediated Endocytosis for the Quantitative Analysis of Protein-Protein Interactions in Live Cells

Biomolecules ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 540 ◽  
Author(s):  
Peter Lanzerstorfer ◽  
Ulrike Müller ◽  
Klavdiya Gordiyenko ◽  
Julian Weghuber ◽  
Christof M. Niemeyer
Keyword(s):  
Quantitative Analysis ◽  
Protein Interactions ◽  
Spatial Arrangement ◽  
Interaction Partner ◽  
Live Cells ◽  
Protein Protein Interactions ◽  
Large Area ◽  
Contact Printing ◽  
Prey Protein ◽  
Protein Micropatterning

Protein micropatterning is a powerful tool for spatial arrangement of transmembrane and intracellular proteins in living cells. The restriction of one interaction partner (the bait, e.g., the receptor) in regular micropatterns within the plasma membrane and the monitoring of the lateral distribution of the bait’s interaction partner (the prey, e.g., the cytosolic downstream molecule) enables the in-depth examination of protein-protein interactions in a live cell context. This study reports on potential pitfalls and difficulties in data interpretation based on the enrichment of clathrin, which is a protein essential for clathrin-mediated receptor endocytosis. Using a highly modular micropatterning approach based on large-area micro-contact printing and streptavidin-biotin-mediated surface functionalization, clathrin was found to form internalization hotspots within the patterned areas, which, potentially, leads to unspecific bait/prey protein co-recruitment. We discuss the consequences of clathrin-coated pit formation on the quantitative analysis of relevant protein-protein interactions, describe controls and strategies to prevent the misinterpretation of data, and show that the use of DNA-based linker systems can lead to the improvement of the technical platform.

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