#atomic structure

[materialsscienceandengineering]

Single-atom vacancies in atomically thin insulators created in ultra-high vacuum

Single photons have applications in quantum computation, information networks, and sensors, and these can be emitted by defects in the atomically thin insulator hexagonal boron nitride (hBN). Missing nitrogen atoms have been suggested to be the atomic structure responsible for this activity, but it is difficult to controllably remove them. A team at the Faculty of Physics of the University of Vienna has now shown that single atoms can be kicked out using a scanning transmission electron microscope under ultra-high vacuum. The results are published in the journal Small.

Transmission electron microscopy allows us to see the atomic structure of materials, and it is particularly well suited to directly reveal any defects in the lattice of the specimen, which may be detrimental or useful depending on the application. However, the energetic electron beam may also damage the structure, either due to elastic collisions or electronic excitations, or a combination of both. Furthermore, any gases left in the vacuum of the instrument can contribute to damage, whereby dissociated gas molecules can etch away atoms of the lattice. Until now, transmission electron microscopy measurements of hBN have been conducted at relatively poor vacuum conditions, leading to rapid damage. Due to this limitation, it has not been clear whether vacancies—single missing atoms—can be controllably created.

Read more.

#Materials Science #Science #Atoms #Vacancies #Insulators #Thin films #Defects #Boron nitride #Materials Characterization #Atomic structure #University of Vienna #Boron #Nitrides

[retrocgads]

UK 1985

#UK1985 #LIB SOFTWARE #EDUCATIONAL #BBC #ELECTRON #ATOMIC STRUCTURE

[teachersource]

Eugene Wigner was born on November 17, 1902. A Hungarian-American theoretical physicist who also contributed to mathematical physics, he received the Nobel Prize in Physics in 1963 “for his contributions to the theory of the atomic nucleus and the elementary particles, particularly through the discovery and application of fundamental symmetry principles”. Wigner’s theorem is a cornerstone in the mathematical formulation of quantum mechanics. He is also known for his research into the structure of the atomic nucleus. In later life, he became more philosophical, and published The Unreasonable Effectiveness of Mathematics in the Natural Sciences, his best-known work outside technical mathematics and physics.

#eugene wigner #physics #elementary particles #atomic structure #quantum mechanics #atomic nucleus #nobel prize #nobel prize winners #science #science birthdays #science history #on this day #on this day in science history

[raffaellopalandri]

Book Of The Day - Science and Philosophy in the Indian Buddhist Classics, Vol. 1: The Physical WorldBook Of The Day

Book Of The Day – Science and Philosophy in the Indian Buddhist Classics, Vol. 1: The Physical WorldBook Of The Day

Today’s Book Of The Day is Science and Philosophy in the Indian Buddhist Classics, Vol. 1: The Physical World by His Holiness the Dalai Lama and Thupten Jinpa (Editor). This series of books, of which Science and Philosophy in the Indian Buddhist Classics, Vol. 1: The Physical World represents the first volume, will give the readers the fantastic opportunity to have a multi-cultural insight of…

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#Asanga #atomic structure #Book #Book Of The Day #book review #brain #Buddhism #Buddhist #Classics #Dalai lama #Dharmakirti #five aggregates #His Holiness The Dalai Lama #India #Nagarjuna #Philosophy #Physical World #reason #science #Science and Philosophy in the Indian Buddhist Classics #Thupten Jinpa #time #Universe #Vasubandhu #world

[voyagerprobe]

good fucking lord we need to demystify minerals. crystals do not have healing or magical powers you guys are just getting scammed

#all a crystal is is an organized repeating atomic structure. i promise. #5k #10k #20k

[paperbakc]

last year's notes. <3

#chemistry #atomic structure #study aesthetic

[truphysics]

Atomic Structure

Atomic structure describes the arrangement of subatomic particles within an atom. Understanding atomic structure is essential for comprehending the behavior of atoms, their chemical properties, and their interactions with other atoms. Basic Atomic Structure Atoms are the smallest units of matter that retain the properties of an element. They consist of a nucleus, containing protons and…

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#Atomic Structure #Index #Quantum

[harmcityherald]

For the First Time: Scientists Have Formed a Charged Rare Earth Molecule on a Metal Surface and Rotated It

#quantum mechanics #atomic structure #molecule #molecular manipulation #this and fusion in the same year

[studychemistrytopics]

Electron Configuration of Rhodium

The 45 electrons of Rhodium atom distributed in various energy levels to show the electronic configuration of [Kr] 4d8 5s1 for more information about Rhodium Metal

#chemistry #Electron Configuration #electron #electron structure #atom #atomic structure

[vikashyadavji]

#discovery of electron #atomic structure #Youtube

[peridammit]

Ok so spoilers for the invincible atom eve special

love how her whole storyline is about how she's weird and not normal and then they make her the NORMALEST girl possible, like how do they make her THAT autistic as a child and then have her?? grow? out of it??? how do you fumble a neurodivergency allegory that hard??

#and dont even get me STARTED on the trans coding #im frustrated #like the girl who grew up staring at the ground and trees cause they were so fascinating to her complains the other smart kids... #...are boring cause they dont do anything fun???? #girl MEMORIZED the atomic structures of everything and loved it but then is like oh they all wanna be engineers and shit how lame #SHE DOESNT EVEN HAVE A FUCKED UP RELATIONSHIP WITH THE COLOR PINK #you can tell the wrote a weird girl storyline without any weird girls on the team #anyway... #invincible #atom eve #mine

[materialsscienceandengineering]

Towards defect engineering: Identifying universal structures on the atomic scale

How will materials behave under certain conditions? And how to make materials more robust? These two questions are crucial to design advanced materials for structural and functional components and applications. A close look at the underlying atomic structures and especially their defects is necessary to understand and predict material behavior.

Electrical conductivity, strength and fracture resistance are for example influenced by grain boundaries. It is known that grain boundaries—despite being defects—have their own ordered atomic structures, which can influence or even dominate material properties. However, their experimental observation requires precise and time-consuming atomic resolution imaging and is limited to the investigation of specific, individual cases.

But are these cases generalizable for all metals? A researcher team of the Max-Planck-Institut für Eisenforschung (MPIE) utilized computer simulations to show that the same atomic arrangements occur in a whole group of metals, namely fcc metals, thus proving that the "special cases" investigated in the experiments are not really exotic, but common.

Read more.

#Materials Science #Science #Defects #Atomic structure #Grain boundaries #Metals #Computational materials science

[teachersource]

Niels Bohr was born on October 7, 1885. A Danish physicist who made foundational contributions to understanding atomic structure and quantum theory, for which he received the Nobel Prize in Physics in 1922, Bohr was also a philosopher and a promoter of scientific research. He developed the Bohr model of the atom, in which he proposed that energy levels of electrons are discrete and that the electrons revolve in stable orbits around the atomic nucleus but can jump from one energy level (or orbit) to another. Although the Bohr model has been supplanted by other models, its underlying principles remain valid. He conceived the principle of complementarity: that items could be separately analysed in terms of contradictory properties, like behaving as a wave or a stream of particles.

#niels bohr #physics #quantum theory #atoms #bohr model #atomic structure #chemistry #science #nobel prize #nobel prize winners #science birthdays #science history #on this day #on this day in science history

[polarmolecule]

molecular geometry my sweetheart my baby. electron orbitals kill yourself.

#I am slowly and steadily losing the plot #chemistry #chemistry meme #chemistry memes #a level chemistry meme #a level chemistry #molecular geometry #molecular structure #molecules #molecular memes #electron configuration #electron geometry #VSERP #atom memes #is this physics? #fuck it #physics meme

[mortal-song]

one thing about me is if a story depicts themes of healing, growing & learning to love despite the presence of tragedy & terror & trauma, i WILL eat that shit up. the story WILL slither its way into my heart and reside there permanently and i will welcome it with open arms

#this is about #hunter x hunter #and #the umbrella academy #SPECIFICALLY those two they rearranged my atomic structure #tua #hxh

[astriiformes]

Been mulling over an intersection of experiences I had last week and coming to the conclusion that I want it to mean something and inspire me to action, I just don't know how.

We read a text in my Women, Gender, and Science class last week that discussed the gendered/sexual language that began to be used in botany around the time of Linnaeus, and I took the opportunity to point out that there was a lot of allo- and amatonormativity happening in the same descriptions. My professor seemed enthused to hear me talk about it, but even more significantly, one of the grad students in the class, who'd been furiously taking notes while I was talking, mentioned it was the first time she'd learned about the terms and seemed extremely interested in what I was pointing out. It felt validating to bring up an angle of discussion that's a product of my own very aromantic perspective and have someone else find it well-articulated and compelling enough to take an academic interest in my point.

--And then, a few hours later, leadership for the queer student group I'm in (which I have become involved with in an official capacity, so that included me) had to deal with an instance of arophobic harassment in our Discord server, prompted by an aspec person harmlessly venting about Valentine's Day things already feeling inescapable.

All this happened the same day I ran our group's student activities fair booth, and a day after I attended my first student government meeting after signing up for the Diversity, Equity, and Inclusion committee -- and specifically an advocacy project related to LGBTQA+/BIPOC mental health needs on campus -- so it's not exactly like I'm sitting around twiddling my thumbs when it comes to queer activism and advocacy. But broadening someone's horizons by explaining terms that affect me daily and witnessing an attack on an aspec person from within the community, in a space where I've never seen anything like that happen to someone who wasn't aro or ace, has me thinking complicated thoughts about how much work there is left to do when it comes to ace and aro advocacy specifically, and coming to the conclusion that while I have plenty of ideas for ways to be outspoken about my community's needs as a trans person these days, I have a lot fewer when it comes to my asexual and aromantic identities.

Something to keep thinking about, I guess, although I really do wish that caring deeply about aspec issues didn't feel so niche and lonely.

#probably doesn't help that when i've dipped my toes into what ace and aro groups are doing online it's felt like.... a bad fit #i won't say it's the wrong things because clearly they matter to some people #but as someone worried more about legal issues and dismantling structural barriers than microlabels or atomizing definitions of attraction #i have felt painfully out of place in most conversations i see happening online #it's probably worth reaching out to local in-person groups but i think the local ones are a lot more hangout-based than political #and i don't know what i have the energy to start myself while still in school and dealing with so much life stress #sigh. i'm glad this is something i care about and clearly have some skill with #but sometimes it also feels like being told i have to do all the work if i want other people to ever care or lend a hand #aceblogging #aroblogging