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In: Energymaterials, International, Summerstudents

Sunlight is a huge source of energy. However, it is not available 24/7. But, solar energy can be used to split water. Water splitting is the decomposition of water into oxygen and hydrogen gas due to the passage of an electric current induced by two electrodes in a conductive solution. This hydrogen can be stored or transported and be used later. Scientists at the Institute for Solar Fuels work on a way to split water efficiently by studing different type of electrodes. Usually, a high photocurrent during water splitting means a high production of hydrogen. When I arrived for my internship at HZB in Wannsee,Read More →

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“Be a diamond. Flourish under pressure” – Maureen Joyce Connolly To most people diamonds are well-known as the marvelous gemstones which used in a piece of jewelry. However, they are not only “a girl’s best friends”. Due to their remarkable physical and optical properties diamonds can be used by scientists and engineers as well! With this blogpost I’ll guide you through my research here at HZB and, hopefully, will share the delight and enjoyment of working with diamonds. Why diamonds? To have a better understanding of diamond it is useful to have a look at its crystalline structure. The strong sp3 covalent bonds between carbonRead More →

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Let’s spray and create samples ! In the institute of Solar Fuel, the main research is to produce hydrogen from sunlight and water. Hydrogen can be used to easily store energy and also directly for transportation. But how can we produce it? Only from the sunlight, a metal oxide semiconductor and water. Photons from sunlight will be absorbed by the metal oxide, and this will generate electrons and holes which oxidize or reduce water. The reaction between the electron and hole and the electrolyte allows to separate water in oxygen and hydrogen. Let’s see how we make this metal Oxide! SPRAY PYROLYSIS: The chemical methodRead More →

Jian Ren and Prof. Brian Paul Schmidt in #LINO19

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Science Without Borders: Impressions from the 69th Lindau Nobel Laureate Meeting (2019) Guestpost by Jian Ren As a doctoral researcher in Helmholtz-Zentrum Berlin, I have been offered many opportunities to expand my horizons by working in an optimal international research environment and by participating in international conferences. Recently, I received another gift from HZB – I was nominated and financially supported by HZB to take part in the Lindau Nobel Laureate Meetings. 580 young scientists meet Nobel Laureates The Lindau Nobel Laureate Meetings have become an event of great importance for the exchange between generations of scientists each summer since 1951. In this year, theRead More →

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By Elżbieta Wątor How to get back to BESSY II ? From Kraków where I study, it’s really easy. By car – it’s around 6 hours and the route is quite convienient. There is also a Ryanair flight to Berlin Schönefeld every morning or Flixbus several times per day. But how to organise that? Here’s my brief story: My participation in the 2017 Summer Student Programme was a happy coincidence. In November 2016 I took part in a small student seminar at Jagiellonian University in Krakow, Poland, where Rafał Piwowarczyk (a summer student in MX group at BESSY II in 2016) talked about his stayRead More →

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In: Careers, International, Students

At HZB about 150 young scientists are working on their doctoral dissertation. 81 come from abroad to Berlin to do their PhD in the HZB labs in Wannsee or Adlershof. The PhD students at HZB have organized themselves: twice a month, they invite to an informal get-together, they plan workshops and an annual PhD retreat in a country hotel in Brandenburg. This is actively supported by the management. I recently asked Daniel Meza, one of eight current doctoral student representatives about their activities. Daniel, why do you work as a representative in the PhD students organization ? Daniel: Maybe it’s a bit romantic, but forRead More →

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Thermoplastic ionomer materials such as Nafion do have many talents: they can be used as membranes for proton exchange in fuel cells, but they have also attracted attention as shape memory materials: Via external stimuli such as heat or an electric field, it is possible to trigger a change in shapes. Applications in textiles, biomedicine, aerospace, sensors and coatings are possible. Nafion: a membrane with shape memory Nafion is one of those materials: as a membrane in a fuel cell, its high proton conductivity allows a fast pass of hydrogen ions (protons). And its internal shape plays a crucial role. Now a team from Brazil hasRead More →

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If you try to search for “PSO” abbreviation in wiki you may find Pacific Symphony Orchestra or Phase-shift oscillator. However, my project at HZB is about neither music nor electricity, but mathematics. For almost a month here I have been working on an algorithm called Particle Swarm Optimization method and I would like you to have some impression of it.  Optimization Actually, the definition of optimization problem is quite simple. One has a function of n-variables f(x1, …, xn) and seeks to find such values of variables that give minimum to the function. However, the solution is not that simple, because in general you cannotRead More →

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With that statement, I used to begin my day in the blue building of PVcomb… I had the chance to participate with the PV to Fuels Technology group in a project for developing a novel type of hydrogen electrolyzers. These electrolyzers are devices that can use the produced voltage from solar cells to split water molecules into hydrogen and oxygen. Therefore, they can enable us to store the solar energy as a chemical fuel, H2; so that we can use it later whenever there is a demand for electricity regardless of the solar irradiance profile over the day. My work is all about simulating newRead More →

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Date: Not important From: Not important                                              Departure at: Not important Destination: Not important                                  Arrival at: Not important Duration: 13h 45min The flight started with much hope, some thoughts and many dreams for what is coming after it lands. It turned out that I should had thought a little about the flight itself in advance. It took only a couple of minutes to figure out that the IndianRead More →