News from KSV NIMA
New Application Overview on fabricating nanoparticle thin films
Posted on October 7, 2014
The KSV NIMA Application Overview describes how the Langmuir-Blodgett (LB) technology is used to fabricate highly organized mono- and multi-layer nanoparticle films.
Langmuir-Blodgett and Langmuir-Schaefer deposition has been shown to be an excellent way to deposit nanoparticles onto substrates. The application overview describes example studies of depositions of graphene, metals and semiconductors and polymers and silica.
To read the full Application Overview: Fabricating Highly Organized Nanoparticle Thin Films
KSV NIMA Launches a New Langmuir-Blodgett Characterization Kit
Posted on August 5, 2014
KSV NIMA is excited to introduce a new Langmuir-Blodgett characterization kit
The kit consists of a KSV NIMA Medium Langmuir-Blodgett trough system, a Brewster Angle Microscope (BAM) and a Surface Potential Meter (SPOT). This set of surface analysis tools enables the production, characterization, imaging and analysis of thin films, all within one instrument platform.
The combined system provides information on the following:
- Molecular Interactions
- Molecule Orientation
- Layer Structure
- Film Homogeneity
- Molecular Structure
- Compression Behavior
- Dilatational Rheology
The Langmuir and Langmuir-Blodgett techniques in general are useful for analyzing lipids, nanoparticles, graphene, proteins, etc…and their behavior at the air/water and oil/water interfaces. Additionally, Langmuir-Blodgett methods are used to deposit well-controlled, uniform films that are a single molecule or multiple layers thick.
If you have questions about the new LB characterization kit, please contact us here and mention the LB Standard kit.
Biolin Scientific and KSV NIMA Return from LB-15
Posted on July 29, 2014
The 15th International Conference on Organized Molecular Films (otherwise known as LB-15) was recently held on Jeju Island in Korea. General topics include studies on Langmuir and Langmuir-Blodgett films, Self-Assembled Monolayers and other nano-scale structures.
More specifically, the 220 plus attendees enjoyed talks on biosensors, molecular and hybrid devices, surface treatments, nanoparticles and membranes. Analytical techniques described include Langmuir and Langmuir-Blodgett, Quartz Crystal Microbalance, Surface Plasmon Resonance and Tensiomsetry.
Additionally, Biolin Scientific Application Scientist Kaisa Lilja presented two talks titled:
– Nanoparticle Langmuir and Langmuir-Blodgett Layers: Formation, Structure and Deposition
– Characterizing Monolayers using Langmuir and Langmuir-Blodgett Instrumentation
For more information on the conference or the talks described above please contact us here.
The next conference, LB-16 will be held in two years in Helsinki, Finland, we hope to see you there!
New Application Note for KSV NIMA now available
Posted on July 11, 2014
KSV NIMA has just released a new application note titled: Nanostrand formation of block copolymers at the air/water interface.
Application Note Summary:
Fabricating thin layers using nanotechnology requires the ability to create structures with precise control of the thickness, packing, and particle organization. The Langmuir-Blodgett (LB) and Langmuir-Schaefer (LS) technologies have been widely used for nanoparticle film fabrication of materials including graphene, metals, semiconductors and colloids. The advantages of the LB and LS methods include highly controlled deposition, a variety of substrates, the ability to alternate layer structures and work under ambient conditions. Additionally, the deposition speed, layer number and temperatures can be controlled.
Block copolymers are frequently used to achieve nanostructures based on phase separation between dissimilar blocks and are commonly used in nanoporous membranes and components in nanodevices. To reach optimal performance, the block copolymers in these materials must form a well-ordered nanopattern. In this study, nanostrand networks were fabricated and analyzed using LB deposition with different solvents and polymer concentrations. The goal was to optimize experimental conditions and create reproducible nanostrands and nanostrand networks with high surface coverage. The full study was published in ACS Nano 2010, 4 (11), pp 6825-6835 by Perepichka et al.
To read the full application note please download it here.
For future reference you can always find it in the KSV NIMA Application Notes section of our website.
Biolin Scientific Returns from PetroPhase 2014
Posted on June 18, 2014
The 15th annual International Conference on Petroleum Phase Behavior and Fouling just finished up in Houston, TX.
PetroPhase 2014 is an annual meeting dedicated to the study of the chemistry, properties and behavior of petroleum components, such as asphaltenes, and their effect on producing, fouling, processing and refining.
Biolin Scientific attended the meeting to showcase the Q-Sense line of Quartz Crystal Microbalances and the QCM-D technology as well as the Attension line of Contact Angle Meters and Tensiometers. Additionally, Biolin presented a poster titled, “A Novel High Pressure and Temperature Chamber for Interfacial Tension and Wettability Studies”.
“Overall the meeting was successful”, Senior Application Scientist Matthew Dixon commented “We made a number of good contacts with industrial scientists studying adsorption, fouling processes and surface phenomena within the Oil and Gas industry and we’ll certainly be back next year”.
KSV NIMA Langmuir-Blodgett Training Course
Posted on June 17, 2014
Biolin Scientific Inc. recently held a hands-on training course for the Langmuir and Langmuir-Blodgett technologies and instrumentation in the Linthicum Heights, MD laboratory.
The 2-day course was well-attended with attendees coming from Johnson & Johnson and DuPont as well as academic and government labs.
The application areas and research interests that were discussed include analyzing consumer products (lotions, moisturizers), protein and phospholipid deposition, toxicology of nanoparticles in membranes, environmental pollutants, and peptide and therapeutic delivery.
A wide range of instrumentation was used including both Langmuir and Langmuir-Blodgett systems as well as characterization tools including Brewster Angle Microscopy, PM-IRRAS, and Surface Potential analysis.
Additionally, Shawn Wettig from U. of Waterloo gave an invited talk on his research, which involves using Langmuir-Blodgett technology and Brewster Angle Microscopy to characterize Gemini surfactant interactions with lipid films towards developing new gene delivery applications.
Overall, the LB training course was a big success. Please contact us for more information or if you would like to attend a course in the future.
Into graphene and nanoparticles?
Posted on May 26, 2014
Check out 10 of the latest and most influential publications with KSV NIMA Langmuir-Blodgett Troughs in graphene and nanoparticle research! We have gathered them for you with a brief summary and if you want to read more, click on the title.
An octadecylamine Langmuir monolayer was utilized as a template for adsorbing highly hydrophilic GO sheets in an aqueous subphase at the liquid–gas interface. The densely packed 2-D monolayer of such complex films was deposited using Langmuir–Schaefer and Langmuir–Blodgett techniques. The technique can provide a route for applications requiring wrinkled graphenes, ranging from nanoelectronic devices to supercapacitors and fuel cell electrodes.
Kim, H., Jang, Y. R., Yoo, J., Seo, Y.-S., Kim, K.-Y., Lee, J.-S., Park, S.-D., Kim, C.-J. and Koo, J.
Langmuir 2014 30, 2170-2177
Division of Neutron Science, Korea Atomic Energy Research Institute (KAERI), Daejeon, South Korea
Adapted with permission from Langmuir 2014, 30, 2170-2177. Copyright 2014 American Chemical Society.
A suitable technology for the preparation of graphene based on versatile wet chemistry and deposition using a Langmuir-Blodgett trough is presented. The protocol allows the wet chemical synthesis of graphene from a new form of graphene oxide that consists of an intact hexagonal σ-framework of C-atoms. Thus, it can be easily reduced to graphene that is no longer dominated by defects.
Eigler, S., Enzelberger-Heim, M., Grimm, S., Hofmann, P., Kroener, W., Geworski, A., Dotzer, C., Röckert, M., Xiao, J., Papp, C., Lytken, O., Steinrück, H.-P., Müller, P. and Hirsch, A.
Adv. Mater. 2013 25, 3583–3587
Department of Chemistry and Pharmacy and Institute of Advanced Materials and Processes (ZMP), University Erlangen-Nürnberg, Fürth, Germany
Ultra-large graphene oxide sheets (up to 100 μm in lateral size) were produced in aqueous media and deposited onto substrates with controllable structure, including flat, rippled, standing collapsed, folded, over folded, highly curved, and scrolled morphologies using a KSV NIMA Langmuir-Blodgett Trough. The layers were visualized using a KS VNIMA MicroBAM. Sheet resistances as low as 8.1 kΩ/sq with 90% transparency on poly(ethylene terephthalate) were measured.
Qingbin Zheng, Q., Shi, L. Ma, P.-C., Xue, Q., Li, J., Tang, Z. and Yang, J.
RSC Adv. 2013 3, 4680–4691
School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai, China
Perpendicularly oriented Anisotropic CdS nanorods tipped by Au nanoparticles (Au-CdS-NRs) were transferred onto transmission electron microscopy grids using the Langmuir–Schaefer technique. The orientation of these assemblies is studied in situ using Brewster angle microscopy while compressing in a Langmuir–Blodgett trough.
Shahar, Y., Banin, U., Mandler, D.
Adv. Mater. Interfaces 2014, 1, 1300030
Institute of Chemistry, Hebrew University of Jerusalem, Jerusalem, Israel
Langmuir isotherms of flexible, covalently crosslinked gold nanoparticle networks: Increased collapse pressures of membrane-like structures
A series of hydrophobic gold nanoparticles were prepared using a Langmuir Trough and thiols as capping ligands. It was discovered that characteristic collapse pressures increased significantly for films of nanoparticles with capping ligand alkyl chain lengths of less than 16 carbons. The films were transferred to a substrate, and TEM analysis revealed that the films retained a flexible, membrane-like morphology.
Sanders II, T. A., Sauceda, M. N. and Dahl, J.A.
Mater. Lett. 2014 120, 159-162
Materials Science Center, University of Wisconsin-Eau Claire, Eau Claire, WI 54702, United States
Surface Pressure Isotherm for a Monolayer of Charged Colloidal Particles at a Water/Nonpolar-Fluid Interface: Experiment and Theoretical Model
Langmuir monolayers of electrically charged micrometer-sized silica particles were fabricated using a Langmuir trough. The obtained experimental results and the developed theoretical model can be useful for prediction and control of the properties of nondensely packed interfacial monolayers from charged particles.
Petkov, P. V., Danow, K. D. and Kralchevsky, P. A.
Langmuir 2014 30, 2768-2778
Department of Chemical Engineering, Sofia University, Sofia, Bulgaria
Adapted with permission from Langmuir 2014, 30, 2768-2778. Copyright 2014 American Chemical Society.
Various morphologies of FePt nanoparticles were fabricated on different substrates with different wetting surfaces by the Langmuir–Blodgett (LB) technology. The method potentially opens up a new approach to controlling assembly of nanoparticle monolayer on solid substrates by change of the wettability on the surfaces of solid substrate.
Wanga, Y., Yangb, M., Xua, B. Yanga, Z., Hua, N., Weia, L., Caia, B., Zhanga, Y.,
J. Colloid Interface Sci. 2014 417, 100-108
Key Laboratory for Thin Film and Microfabrication of Ministry of Education, Institute of Micro and Nano Science and Technology, Shanghai Jiaotong University, Shanghai, China
Mechanical properties and particle tracking of nanoparticles at the air–water interface ac a function of their packing density were measured. The surface pressure and isothermal compression modulus were controlled using a Langmuir trough. The study gives insight into the morphology and flexibility of close packed high density nanoparticle monolayers.
Bhattacharya, R. and Basu, J. K.
J. Colloid Interface Sci. 2013 396 69–74
Department of Physics, Indian Institute of Science, Bangalore, India
Enhanced performance of polymer solar cells with a monolayer of assembled gold nanoparticle films fabricated by Langmuir-Blodgett technique
An enhanced performance of polymer solar cells by using a Langmuir-Blodgett layer of gold nanoparticles was reported. The nanoparticle sizes and interparticle distances were optimized by selecting various sizes of Au nanoparticles and by controlling the LB deposition conditions. An enhancement of ∼10–20% in power conversion efficiency for all the devices with the Au NP monolayer was observed.
Chen, X., Yang, X., Fu, W., Xu, M. and Chen, H.
Mater. Sci. Eng. B 2013 178 53– 59
State Key Lab of Silicon Materials, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering, Zhejiang University, Hangzhou, People’s Republic of China
Block copolymer assisted self-assembly of nanoparticles into Langmuir-Blodgett films: Effect of polymer concentration
CdSe quantum dot structures of different morphologies were transferred onto mica using a Langmuir-Blodgett trough. The morphology of the LB films was analyzed by AFM and TEM measurements. The results show that it is possible to modulate the self-assembly process by modifying the composition of the mixed Langmuir monolayer precursor of the LB film.
Martín-García, B. and Velázquez, M. M.
Mater. Chem. Phys. 2013 141 324-332
Departamento de Química Física, Universidad de Salamanca, Salamanca, Spain
KSV NIMA Stand-Alone MicroBAM
Posted on February 10, 2014
The KSV NIMA Brewster Angle Microscopes represents the latest in BAM instrumentation allowing high resolution and fully focused real-time imaging of monolayers.
The excellent image quality and good lateral resolution make them ideal instruments for the visualisation of morphological film parameters (e.g. compressed film homogeneity, domain size, shape and packing). Real-time observation and recording of film structure enables dynamic activity to be captured. The new KSV NIMA Stand-Alone MicroBAM can be now used with most Langmuir and Langmuir-Blodgett Troughs also from other manufacturers as well as free standing vessels. The KSV NIMA Stand-Alone MicroBAM connects directly to the computer via USB making it remarkably easy to setup and use.
Visit the product page for more information or contact your closest KSV NIMA representative.