ISSPIC, the International Symposium on Small Particles and Inorganic Clusters, is an established biennial conference series on fundamental science of finite size effects and the possibility of controlling the properties of material at the nanometer scale, organized since 1976. The conference topics typically include atomic and molecular clusters and their assemblies, supported and free-standing nanostructures and particles, and other nanometer-scale systems.
The first ISSPIC conference was held in 1976 in Lyon. The idea to organize an international meeting of scientists who research the nanomolecular and atomic structures was given by pioneers in nanophysics such as Jean Farges, Jacques Friedel , Walter Knight, Ryogo Kubo , and Bernhard Mühlschlegel . [1] Friedel was also the chairman of the first conference.
The main theme of the first couple of ISSPIC symposiums was fundamental studies on the finite-size effects of atomic and molecular clusters. [1] The discussion emphasized the physical aspects. [1] At the beginning, the conference was organized every fourth year but since 1988 it was held every two years. The conference has become a fundamental event on the area of the nanoscience and the research of nanoclusters during the last decades.
The ISSPIC XX scheduled for 2020 unfortunately had to be cancelled because of the COVID 19 pandemic situation. However, the succeeding ISSPIC XXI has already been announced to take place in Berlin, Germany in 2023. [2]
The objective of the conference is to be an interdisciplinary forum for presentation and discussion of fundamental and technological developments in the research fields involving finite size effects of materials at the nanometer scale.
The studies discussed at the conference comprise the structure and thermodynamics of nanoparticle systems, their electronic structure and quantum effects, spectroscopy and dynamics, reactivity and catalysis, correlated electrons, magnetism, superconductivity, optical properties and plasmonics, carbon nanomaterials, biotechnological and medical applications, environmental science, devices and applications, energy applications, and many more.
The symposia aim to provide an overview of new results, emerging trends, and perspectives in the science of atomic and molecular clusters, nanoparticles, and nanostructures. In addition, the interdisciplinary approach has proven to stimulate the emergence of new research topics, enabling innovative applications of nanoscience.
On 12 September 1990 during the 5th ISSPIC which was held in Konstanz, Germany, Wolfgang Krätschmer presented a report on the large-scale production of C60 (fullerenes) at the scheduled talk of Richard Smalley. This discovery caused a huge growth in materials science of nanocarbons. It also revealed the essential role of chemistry in the use of molecular clusters as a functional unit of the new materials. [1]
A great part of the latest research results which were introduced in the conference in Fukuoka, Japan in 2014 were related to gold and silver nanoparticles. [1] The research has mainly focused on the metallic nanostructures at this time. One of the growing research interests has been the ligand-protected metallic clusters. [1] In addition to gold and silver, other metals such as platinum, palladium, copper, nickel, zirconium and niobium were used in the experiments and also metalloid materials like silicon. [3] Other issues were different type of molecular structures and magnetic, optical, chemical, and thermal properties of those structures.
Researchers in the ISSPIC community have been working on nanoscience long before the term became as popular as it is today. From its start, one central theme in the field has been to try to understand how matter organizes itself from the atomic and molecular dimensions to nanoparticle regime and finally to bulk and how the various physical and chemical properties of a nanometer-size chunk of material are affected by its dimensionality, size, and the environment. ISSPIC XVIII in Jyväskylä, Finland, made an effort to enhance the visibility of cluster science to neighboring areas of nanoparticle catalysis, interface chemistry, plasmonics, biological systems, and research on climate change while not forgetting the traditional themes in the field. [4] The 19th conference of the series held in Hangzhou in China in 2018 continued these efforts in striving to maintain the theme of cluster science, while reaching out to the broader fields related to nanoscience and in particular nanotechnology. [5]
After a five years intermission owing to the pandemic situation, the forthcoming ISSPIC XXI in Berlin in 2023 aims to reflect the actual status of research in the physics and chemistry of small particles and clusters. However, even more importantly, it intends to provide a platform highlighting new contributions that focus on novel aspects of finite size and small particle research like, e.g., 2D-materials (graphene and beyond), cluster research at advanced light sources, spintronics, nanodiamonds, single and few atom clusters in heterogeneous catalysis, and novel theoretical and experimental methods to study finite size effects. [2]
Nanotechnology is the manipulation of matter with at least one dimension sized from 1 to 100 nanometers (nm). At this scale, commonly known as the nanoscale, surface area and quantum mechanical effects become important in describing properties of matter. This definition of nanotechnology includes all types of research and technologies that deal with these special properties. It is common to see the plural form "nanotechnologies" as well as "nanoscale technologies" to refer to research and applications whose common trait is scale. An earlier understanding of nanotechnology referred to the particular technological goal of precisely manipulating atoms and molecules for fabricating macroscale products, now referred to as molecular nanotechnology.
In physics, a plasmon is a quantum of plasma oscillation. Just as light consists of photons, the plasma oscillation consists of plasmons. The plasmon can be considered as a quasiparticle since it arises from the quantization of plasma oscillations, just like phonons are quantizations of mechanical vibrations. Thus, plasmons are collective oscillations of the free electron gas density. For example, at optical frequencies, plasmons can couple with a photon to create another quasiparticle called a plasmon polariton.
Nanomaterials describe, in principle, chemical substances or materials of which a single unit is sized between 1 and 100 nm.
A nanoparticle or ultrafine particle is a particle of matter 1 to 100 nanometres (nm) in diameter. The term is sometimes used for larger particles, up to 500 nm, or fibers and tubes that are less than 100 nm in only two directions. At the lowest range, metal particles smaller than 1 nm are usually called atom clusters instead.
A nanoruler is a tool or a method used within the subfield of "nanometrology" to achieve precise control and measurements at the nanoscale. Measurements of extremely tiny proportions require more complicated procedures, such as manipulating the properties of light (plasmonic) or DNA to determine distances. At the nanoscale, materials and devices exhibit unique properties that can significantly influence their behavior. In fields like electronics, medicine, and biotechnology, where advancements come from manipulating matter at the atomic and molecular levels, nanoscale measurements become essential.
Gold clusters in cluster chemistry can be either discrete molecules or larger colloidal particles. Both types are described as nanoparticles, with diameters of less than one micrometer. A nanocluster is a collective group made up of a specific number of atoms or molecules held together by some interaction mechanism. Gold nanoclusters have potential applications in optoelectronics and catalysis.
Nanochemistry is an emerging sub-discipline of the chemical and material sciences that deals with the development of new methods for creating nanoscale materials. The term "nanochemistry" was first used by Ozin in 1992 as 'the uses of chemical synthesis to reproducibly afford nanomaterials from the atom "up", contrary to the nanoengineering and nanophysics approach that operates from the bulk "down"'. Nanochemistry focuses on solid-state chemistry that emphasizes synthesis of building blocks that are dependent on size, surface, shape, and defect properties, rather than the actual production of matter. Atomic and molecular properties mainly deal with the degrees of freedom of atoms in the periodic table. However, nanochemistry introduced other degrees of freedom that controls material's behaviors by transformation into solutions. Nanoscale objects exhibit novel material properties, largely as a consequence of their finite small size. Several chemical modifications on nanometer-scaled structures approve size dependent effects.
Nanocomposite is a multiphase solid material where one of the phases has one, two or three dimensions of less than 100 nanometers (nm) or structures having nano-scale repeat distances between the different phases that make up the material.
Nanogeoscience is the study of nanoscale phenomena related to geological systems. Predominantly, this is investigated by studying environmental nanoparticles between 1–100 nanometers in size. Other applicable fields of study include studying materials with at least one dimension restricted to the nanoscale and the transfer of energy, electrons, protons, and matter across environmental interfaces.
Nanomechanics is a branch of nanoscience studying fundamental mechanical properties of physical systems at the nanometer scale. Nanomechanics has emerged on the crossroads of biophysics, classical mechanics, solid-state physics, statistical mechanics, materials science, and quantum chemistry. As an area of nanoscience, nanomechanics provides a scientific foundation of nanotechnology.
Polymer nanocomposites (PNC) consist of a polymer or copolymer having nanoparticles or nanofillers dispersed in the polymer matrix. These may be of different shape, but at least one dimension must be in the range of 1–50 nm. These PNC's belong to the category of multi-phase systems that consume nearly 95% of plastics production. These systems require controlled mixing/compounding, stabilization of the achieved dispersion, orientation of the dispersed phase, and the compounding strategies for all MPS, including PNC, are similar. Alternatively, polymer can be infiltrated into 1D, 2D, 3D preform creating high content polymer nanocomposites.
Thalappil Pradeep is an institute professor and professor of chemistry in the Department of Chemistry at the Indian Institute of Technology Madras. He is also the Deepak Parekh Chair Professor. In 2020 he received the Padma Shri award for his distinguished work in the field of Science and Technology. He has received the Nikkei Asia Prize (2020), The World Academy of Sciences (TWAS) prize (2018), and the Shanti Swarup Bhatnagar Prize for Science and Technology in 2008 by Council of Scientific and Industrial Research.
Nanoparticles are classified as having at least one of its dimensions in the range of 1-100 nanometers (nm). The small size of nanoparticles allows them to have unique characteristics which may not be possible on the macro-scale. Self-assembly is the spontaneous organization of smaller subunits to form larger, well-organized patterns. For nanoparticles, this spontaneous assembly is a consequence of interactions between the particles aimed at achieving a thermodynamic equilibrium and reducing the system’s free energy. The thermodynamics definition of self-assembly was introduced by Professor Nicholas A. Kotov. He describes self-assembly as a process where components of the system acquire non-random spatial distribution with respect to each other and the boundaries of the system. This definition allows one to account for mass and energy fluxes taking place in the self-assembly processes.
An icosahedral twin is a nanostructure appearing in atomic clusters and also nanoparticles with some thousands of atoms. These clusters are twenty-faced, with twenty interlinked tetrahedral crystals joined along triangular faces having three-fold symmetry. A related, more common structure has five units similarly arranged with twinning, which were known as "fivelings" in the 19th century, more recently as "decahedral multiply twinned particles", "pentagonal particles" or "star particles". A variety of different methods lead to the icosahedral form at size scales where surface energies are more important than those from the bulk.
Nanoclusters are atomically precise, crystalline materials most often existing on the 0-2 nanometer scale. They are often considered kinetically stable intermediates that form during the synthesis of comparatively larger materials such as semiconductor and metallic nanocrystals. The majority of research conducted to study nanoclusters has focused on characterizing their crystal structures and understanding their role in the nucleation and growth mechanisms of larger materials.
Hannu Häkkinen is a Finnish physicist and professor of computational nanoscience at the University of Jyväskylä.
Uwe Paul Erich Thumm is a German-American physicist with research interests in atomic, molecular, and optical physics and nanoscience. A distinguished physics professor at Kansas State University and the J. R. Macdonald Laboratory in Manhattan, Kansas his research team investigates the ultrafast dynamics of electrons and molecular fragments in laser-matter and particle-matter interactions, highly-charged-ion physics, electron–atom collisions, and plasmonic nanostructures. He is a Fellow of the American Physical Society and recipient of several awards, including the Senior Research Award of the Alexander von Humboldt Foundation.
In chemistry, plasmonic catalysis is a type of catalysis that uses plasmons to increase the rate of a chemical reaction. A plasmonic catalyst is made up of a metal nanoparticle surface which generates localized surface plasmon resonances (LSPRs) when excited by light. These plasmon oscillations create an electron-rich region near the surface of the nanoparticle, which can be used to excite the electrons of nearby molecules.
Professor Günther Rupprechter is a distinguished Austrian scientist, full professor and currently Head of the Institute of Materials Chemistry, Technische Universität Wien. He is renowned for his contributions to the fields of physical chemistry, surface science, nanoscience and nanotechnology, particularly in the area of catalytic surface reactions on heterogeneous catalysts, identifying fundamental reaction steps at the atomic level by in situ and operando spectroscopy and microscopy.