November 2013

WITec Raman images on Science Magazine Cover

The current cover of Science Magazine (Nov 8, Vol. 342) shows Raman images of carbon isotope–labeled graphene domains which were generated with a WITec alpha300 Raman imaging microscope.

The cover images illustrate the influence of temperature on graphene domain growth and are part of the scientific paper “The role of surface oxygen in the growth of large single-crystal graphene on copper”. The authors are scientists from well-established research institutes in the USA and Singapore and experts in the field of graphene research.

WITec Raman imaging systems provide high performance in sensitivity, speed and resolution and are perfectly suited for the generation of high-quality Raman images.

Original publication:

Y. Hao, M. S. Bharathi, L. Wang, Y. Liu, H. Chen, S. Nie, X. Wang, H. Chou, C. Tan, B. Fallahazad, H. Ramanarayan, C. W. Magnuson, E. Tutuc, B. I. Yakobson, K. F. McCarty, Y. W. Zhang, P. Kim, J. Hone, L. Colombo, R. S. Ruoff, The role of surface oxygen in the growth of large single-crystal graphene on copper. Science342, 720-723 (2013); published online EpubNov 8 (10.1126/science.1243879).

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October 2013

Conference Review: 10th Confocal Raman Imaging Symposium

The international Raman microscopy community met from September 30th to October 2nd 2013, in Ulm, Germany to present and discuss their latest scientific results at the 10th Confocal Raman Imaging Symposium. The diverse talks and poster presentations from various scientific fields provided a comprehensive overview of modern Raman microscopy. The start of the symposium was already promising, setting a record of over 110 attendees who were attracted by the interesting program and the excellent reputation of the symposium.

On the first day of the symposium Prof. Sebastian Schlücker from the University of Duisburg-Essen, Germany, initiated the series of lectures with an introduction to the basics and theoretical background of Raman spectroscopy. Afterwards the audience participated in an interactive quiz about their theoretical and practical Raman knowledge. Next was the contributed talk session for which three distinguished researchers were selected from among the submitted abstracts: Dr. Ann-Kathrin Kniggendorf from the Hanover Center for Optical Technologies, Germany, showed her comprehensive results of biofilm analyses; Dr. Nagarajan Subramaniyam from Aalto University in Finland explained the significant work of his research group in the field of semiconductor research. Alden Dochshanov, University of Naples, Italy, finished the contributed talk session with his interesting explanation of recent Tip-enhanced Raman Spectroscopy (TERS) studies in life science research.  The conclusion to the first conference day was provided by Prof. Werner Kiefer, University of Würzburg, Germany, with his excellent self-made movie about Raman history.

On the second day of the symposium, Dr. Olaf Hollricher, WITec Managing Director R&D, started the talk session with a practical introduction to confocal Raman microscopy and instrument configurations. He provided useful information on characteristics and specifications of Raman microscope systems for the attendant researchers. In the following presentation Dr. Thomas Dieing, WITec Director Applications & Support, illustrated the possibilities of combined Raman-AFM techniques and gave new insights into novel structural surface imaging techniques such as TrueSurface. Then Prof. Malgorzata Baranska from the Jagiellonian University, Poland, presented her impressive work about combined Raman, Atomic Force, and Scanning Near-field optical microscopy in the field of lifestyle diseases research. Prof. Baranska demonstrated her scientific achievements with numerous images of her research results. In the next talk, Dr. Christian Matthäus from the Institute of Photonic Technology in Germany showed results acquired through his years of experience in the field of Raman imaging of eukaryotic cells. Evelien Mathieu from imec in Belgium concluded the first session with an overview of her research work about surface-enhanced Raman spectroscopy (SERS) of various living biological systems.

In the afternoon session Prof. Henrique E. Toma from the University of Sao Paulo in Brazil introduced the second session of the day with a comprehensive overview of Raman microscopy in nanotechnology research. Prof. Christoph Stampfer, RWTH Aachen, Germany, then explained the advantageous application of Raman Microscopy for Graphene and Nano Carbon research. He also stated the importance of these materials for future electrical devices and applications. In the following talk Prof. Jeongyong Kim from the Sungkyunkwang University in South Korea showed results of nano confocal spectroscopic imaging. Another highlight was Dr. Jagjit Nanda’s talk. He shared with the audience his descriptions of confocal Raman Imaging of Electrochemical Storage Materials. The second symposium day was concluded by Prof. Andrew Steele, Carnegie Institute, USA: He was prevented from attending the symposium personally and so presented his high-impact Raman microscopy investigations of extraterrestrial materials directly from his office in Washington DC.

The poster sessions on the first and second day of the symposium were also well-received. While having a snack and a drink, the participants could discuss the scientific topics of a large variety of different research fields and gain new ideas for their further research work. 
At night all attendees met in downtown Ulm for the conference dinner. It was a welcome change for the participants and supported the interactive and productive conference atmosphere.

During the third day of the symposium the participants had the chance to receive more practical information about Raman microscopy systems during the instrument and software demonstration at WITec headquarters. There was also enough time to discuss all remaining questions directly with WITec employees.

In summary the participants expressed their satisfaction with the symposium and some of them have already announced their attendance for the 11th Confocal Raman Imaging Symposium, which will be held from September 29th to October 1st2014 in Ulm, Germany.

See more event images on our facebook page

Book of Abstracts - 3 MB

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June 2013

WITec’s RayShield Coupler makes accessible Raman data at low wavenumbers

WITec’s RayShield Coupler is now available for the alpha300 and alpha500 microscope series. It allows the acquisition of Raman spectra at wavenumbers down to below 10 rel. cm-1. This high-transmission coupler system includes a specialized narrow-band filter set which is optimally aligned to detect Raman lines extremely close to the Rayleigh line while maintaining ideal Rayleigh shielding.  Thus additional spectral information from Stokes and Anti-Stokes Raman signals can be obtained.

The RayShield Coupler is available for a variety of laser wavelengths from 488 to 785 nm. Currently installed alpha300 and alpha500 microscopes can be upgraded with the RayShield Coupler.

Applications in semiconductor research, the pharmaceutical industry, life science, nano carbon research, and materials science in particular will benefit from WITec’s RayShield Coupler.

Further info:

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April 2013

Congratulations to the winners of the WITec PaperAward 2013

Three research groups received the WITec PaperAward in gold, silver, and bronze.

WITec appoints the winners of the PaperAward 2013: Research groups from France, Germany, and Spain are among the winners. For WITec PaperAward 2013, 54 publications, published between January and December 2012, were submitted to this year’s competition. Due to the number of high-quality papers, the PaperAward jury decided to recognize three winning papers in gold, silver, and bronze.

The PaperAward 2013 in gold goes to Dr. Léo Greusard from the team of Dr. Yannick De Wilde at Institut Langevin, CNRS & ESPCI ParisTech, and to Dr. Daniele Costantini from the team of Dr. Raffaele Colombelli at the Institut d’Electronique Fondamentale et CNRS & University Paris Sud. They successfully collaborated with researchers from Institut des Nanotechnologies de Lyon and the Joint lab of ‘Alcatel-Lucent Bell Laboratories France’ and published in NANO letters “Constantini et al., In Situ Generation of the Surface Plasmon Polaritons Using a Near-Infrared Laser Diode”. This scientific work convinced the jury by describing a novel application for scanning near-field optical microscopy (SNOM), which opens new opportunities in semiconductor research. For the PaperAward Ceremony, WITec’s French representative Nicolas Tcherbak visited Dr. Léo Greusard to hand over the certificate as well as a 500 € Amazon gift card.

The silver WITec PaperAward winners are researchers from the Institute of Photonic Technology in Jena, Germany. Dr. Christian Matthäus and Prof. Dr. Jürgen Popp demonstrated, together with colleagues from Friedrich Schiller University in Jena and the Catholic Clinics in Koblenz, in the paper “Matthäus et al., Noninvasive Imaging of intracellular Lipid Metabolism in Macrophages by Raman Microscopy in Combination with Stable Isotopic Labeling”, published in Analytical Chemistry, how Raman spectroscopy can be successfully used to image cellular processes. The jury honored Dr. Matthäus and colleagues for their scientific work in this very auspicious new field for Raman spectroscopy. Dr. Matthäus visited WITec headquarters in Ulm and received the PaperAward certificate and a 300 € Amazon gift card from Harald Fischer, WITec Marketing Director.

The WITec PaperAward in bronze goes to the research group of Prof. Dr. José F. Fernández from the Electroceramic Department, Instituto de Cerámica y Vidrio in Madrid, Spain. Prof. Fernández and colleagues published in the Journal of Materials Chemistry in collaboration with researchers at Universidad Nacional Autónoma de México, the paper “Rubio-Marcos et al., High spatial resolution structure of (K,Na)Nbo₃ lead-free ferroelectric domains”. The jury chose their scientific work for the award because it shows the combination of Raman spectroscopy and Atomic Force Microscopy (AFM) as a powerful tool to investigate ferroelectric domains. Dr. Elena Bailo, WITec’s Area Manager for Spain and Portugal, visited Prof. Dr. José F. Fernández and Dr. Adolfo Del Campo at the Electroceramic Department to hand over the PaperAward certificate in bronze as well as a 200 € Amazon gift card.

Every year scientists from all over the world are invited to submit their publications to the WITec PaperAward competition. Once a year, a jury of WITec scientists chooses the WITec PaperAward winner. Criteria to be selected by the jury are for example the impact of scientific results and the innovation of the applied techniques.

WITec would like to thank all researchers who submitted their publications to the WITec PaperAward competition and congratulates the winners of the PaperAward for their exemplary submissions.

Please note this year’s PaperAward competition. For participation papers can be submitted to

Further info:

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March 2013

PITTCON 2013: WITec launches StrobeLock for time-resolved measurements

At Pittcon 2013 WITec launches StrobeLock, a time-correlated single photon counting measurement option. The imaging modes include Fluorescence Lifetime Imaging and Time-resolved Luminescence Microscopy, which can be integrated with the WITec alpha300 and alpha500 microscope series.

StrobeLock facilitates the acquisition of additional material contrasts hidden in the time function of a fluorescence or luminescence signal and allows them to be perfectly linked with Raman, SNOM or AFM imaging. It enables a variety of measurement possibilities for an improved and more comprehensive understanding of a sample’s properties and is specifically suited for materials science.

The modular design of the WITec microscopes facilitates user-friendly combination of the StrobeLock module with the WITec confocal microscope series. StrobeLock is comprised of a pulsed excitation laser system combined with a Time-Correlated Single-Photon Counting (TCSPC) detector. The possibility to switch between time-resolved and conventional mode enables the microscope user to conveniently choose the preferred measurement technique.

 “StrobeLock complements the modular WITec microscope systems with customized solutions for the most accurate Fluorescence Lifetime Imaging and Time-Resolved Luminescence Microscopy.” said Dr. Joachim Koenen, WITec co-founder and Managing Director “This exceptional development significantly extends the capabilities of the WITec microscope series and opens a new field of application for a more comprehensive sample.

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February 2013

WITec managing director contributes to The James L. Waters Annual Symposium at Pittcon

Joachim Koenen, WITec co-founder and Managing Director, has the honor of giving a talk about “Confocal Raman Microscopy: From Single Spectra Acquisition to Routine 3D Raman Imaging” at the well-respected James L. Waters Annual Symposium on “Chemical Imaging Spectroscopy”.

The symposium takes place during the Pittcon Conference on Monday, March 18th, 2013, at the Pennsylvania Convention Center, Philadelphia, USA. According to the conference’s homepage the speakers chosen for the symposium are “pioneers in this field and are uniquely qualified to discuss the development of chemical imaging and its commercialization”. The session will also focus on the current state of the technique and what the future holds for chemical imaging. More information can be found here:

Pittcon is an annual conference and exposition on laboratory science and instrumentation. It offers a technical and educational program with a first-hand look at all the latest products and technology solutions.

Please visit the WITec booth (no. 339) at Pittcon 2013 to learn more about the latest WITec products and application options.

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January 2013

Prof. Cai Weiwei's research published on Nature Materials

The Xiamen University just announced the Prof. Cai Weiwei's research published on Nature Materials ("Thermal conductivity of isotopically modified graphene" Nature Materials 11, 203–207 (2012); doi:10.1038/nmat3207).

For more Info visit the news page of the Xiamen University here.

In Xiamen Prof. Cai Weiwei works with a WITec alpha300 R Confocal Raman Imaging System.

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