포도 4배체 ‘후지미노리’와 3배체 ‘썸머블랙’의 교배로 얻은 미숙배의 기내배양

고재철(Jae Chul Koh),오주은(Ju Eun Oh) 한국원예학회 2013 원예과학기술지 Vol.31 No.3

포도 4배체 ‘Fujiminori’에 3배체 ‘Summer Black’을 인공교배하여 얻은 미숙배의 발아 및 식물체 분화를 목적으로 MS 배지에 GA3와 Coconut water(CW)를 농도별로 첨가하여 배배양을 실시하였다. ‘Fujiminori’에 ‘Summer Black’을 교배하여 64.3%의 미숙배를 얻을 수 있었고, 미숙배를 기내 배양한 결과 GA3 모든 처리구(0.01, 0.05, 0.25, 1.25mg·L<SUP>-1</SUP>)에서는 95% 이상의 발아율을 나타내었으나, 15.8-31.6%만이 정상적인 식물체로 생장하였다. 또한 GA3의 농도가 높아질수록 하배축은 신장되었고, 비대생장은 억제되었다. CW 모든 처리구(5, 10, 15, 20%) 중에 CW 10%와 CW 15% 처리구에서는 각각 68.4%와 66.7%로 많은 식물체를 획득할 수 있었다. 또한 줄기의 길이생장, 마디수, 발근수는 CW 10% 처리구에서, 뿌리길이는 CW 15% 처리구에서 양호한 결과를 나타내었다. 따라서 포도 4배체 ‘Fujiminori’와 3배체 ‘Summer Black’의 인공교배를 통해 얻어진 미숙배의 발아 및 생장을 위해서는 CW 10-15%를 첨가한 MS 배지를 이용한 배배양이 효과적이다. For the germination and differentiation of immature embryos obtained by artificial crossing between tetraploid grape ‘Fujiminori’ (Vitis vinifera × V. labruscana) and triploid ‘Summer Black’ (V. labruscana × V. vinifera), were incubated in vitro using MS medium supplemented with GA3 or coconut water (CW) at various concentrations. The percentage of embryo formation of ‘Fujiminori’ × ‘Summer Black’ was 64.3%. Embryo germination percentage was higher than 95% in all the GA3 treatments at the concentrations of 0.01, 0.05, 0.25, and 1.25 mg·L<SUP>-1</SUP>. However, only 15.8-31.6% of the germinated embryos successfully developed into normal plantlets. At higher concentration of GA3, the plantlets developed infirm hypocotyls with over elongated and less enlarged structure. Among the treatments of CW at the concentrations of 5, 10, 15, and 20% (v/v), 10% and 15% were more effective and plantlet achievement percentage were 68.4 and 66.7%, respectively. The addition of 10% CW was most effective to obtain plantlets with optimal shoot length, node and root numbers. 15% CW was suitable to obtain plantlets with longer roots. Accordingly, the embryo culture using the MS medium supplemented with 10-15% CW was observed to be more efficient for germinating and growing the immature embryos produced from artificial crossing between tetraploid grape ‘Fujiminori’ and triploid ‘Summer Black’.

Ga<SUP>+<SUP> 이온 조사를 통한 Co₇₃Pt₂₇-TiO₂ 수직자기 기록매체의 자기적 특성 변화

김성동(Sungdong Kim),박진주(Jin Joo Park) 한국자기학회 2007 韓國磁氣學會誌 Vol.17 No.6

The effects of Ga<SUP>+<SUP> ion irradiation on the magnetic properties of the Co?₃Pt₂?-TiO₂ perpendicular magnetic recording media were investigated. As Ga<SUP>+<SUP> ion dose increased from 1×10¹? ions/㎠ to 30×10¹? ions/㎠, the perpendicular magnetic anisotropy was degraded and no longer observed above 20×10¹? ions/㎠ dose. The deterioration of the perpendicular magnetic anisotropy and ferromagnetic properties can be attributed to the concentration profile change due to Ga<SUP>+<SUP> ion implantation. The magnetic islands of 70×70 n㎡ and 100×100 n㎡ size were successfully fabricated with Ga<SUP>+<SUP> ion irradiation.

온도 및 생장조절제가 국내 육성 사과 품종의 화분발아율 및 화분관 신장에 미치는 영향

권헌중(Hun-Joong, Kweon),박무용(Moo-Yong Park),송양익(Yang-Yik, Song),손광민(Kwang-Min Son),사공동훈(Dong-Hoon Sagong) (사)한국생물환경조절학회 2016 생물환경조절학회지 Vol.25 No.3

본 시험은 만개기 기온(15~40oC) 및 생장조절제(GA4+7+BA와 prohexadione-calcium) 살포가 국내 주요 사과품종(‘후지’, ‘쓰가루’)과 국내에서 육성한 품종들(‘추광’, ‘감홍’, ‘홍안’, ‘홍금’, ‘홍로’, ‘홍소’, ‘화홍’, ‘섬머드림’, ‘선홍’)의 화분 발아율 및 화분관 신장에 미치는 영향을 조사하고자 실시하였다. 15℃부터 25℃까지 온도가 올라갈수록 화분 발아율과 화분관 신장 길이는 증가되었으나, 30℃ 이상의 고온은 화분 발아율과 화분관 신장 길이를 억제시켰다. 30oC 이상의 고온에서 화분 발아율과 화분관 신장 길이가 가장 높았던 국내 육성 사과품종은 ‘선홍’이었다. GA4+7+BA 살포는 무처리구에 비해 화분 발아율 및 화분관 신장 길이를 증진시켰으나, 이러한 효과는 40℃에서 발생하지 않았다. prohexadione-calcium 살포는 화분 발아율과 화분관 신장 길이에 영향을 주지 않았다. 결론적으로, 사과나무 만개기 기온이 30~35℃ 정도로 높아지면, 인공수분 후 GA4+7+BA를 살포하는 것이 착과 증진에 좋을 것으로 판단되었다. This study was carried out to investigate the effect of temperature (15~40℃) and the spraying plant growth regulators (GA4+7+BA and prohexadione-calcium) during full blooming on pollen germination and pollen tube growth of the commercial apple cultivars (‘Fuji’ and ‘Tsugaru’) and apple cultivars bred in Korea (‘Chukwang’, ‘Gamhong’, ‘Hongan’, ‘Honggeum’, ‘Hongro’, ‘Hwahong’, ‘Hongso’, ‘Summer dream’ and ‘Sunhong’). Pollen germination and pollen tube growth were increased with increasing temperature from 15 to 25℃, but high temperature over 30℃ inhibit those. The apple cultivar bred in Korea that shows the highest value on pollen germination and pollen tube growth at over 30℃ was ‘Sunhong’. The spraying GA4+7+BA increased pollen germination and pollen tube growth than control, but that effect was not show at 40℃. The spraying prohexadione-calcium was not affect to pollen germination and pollen tube growth. In conclusion, if the air temperature during full bloom of apple tree rises about 30~35℃, the spraying GA4+7+BA after artificial pollination will be good to increasing fruit set.

Performance Improvement by Controlling Se/metal Ratio and Na₂S Post Deposition Treatment in Cu(In,Ga)₃Se<SUB>5</SUB> Thin-Film Solar cell

Hui-Ling Cui,Seung Tae Kim,R.B.V. Chalapathy,Ji Hye Kim,Byung Tae Ahn 한국태양광발전학회 2019 Current Photovoltaic Research Vol.7 No.4

Cu(In,Ga)₃Se5 (β-CIGS) has a band gap of 1.35 eV, which is an optimum value for high solar-energy conversion efficiency. The effects of Cu and Ga content on the cell performance were investigated previously. However, the effect of Se content on the cell performance is not well understood yet. In this work, β-CIGS films were fabricated by three-stage co-evaporation of elemental sources with various Se fluxes at the third stage instead of at all stages. The average composition of five samples was Cu1.05(In0.59,Ga0.41)₃Sey, where the stoichiometric y value is 5.03 and the stoichiometric Se/metal (Se/M) ratio is 1.24. We varied the Se/metal ratio in a range from 1.18 to 1.28. We found that the best efficiency was achieved when the Se/M ratio was 1.24, which is exactly the stoichiometric value where the CIGS grains on the CIGS surface were tightly connected and faceted. With the optimum Se/M ratio, we were able to enhance the cell efficiency of a β-CIGS solar cell from 9.6% to 12.0% by employing a Na2S post deposition treatment. Our results indicate that Na₂S post deposition treatment is very effective to enhance the cell efficiency to a level on par with that in α-CIGS cell.

후조당<SUB>後彫堂</SUB> 김부필<SUB>金富弼</SUB>의 삶과 시세계

권진호(權鎭浩) 한국국학진흥원 2016 국학연구 Vol.0 No.30

이 논문은 후조당 김부필(1516~1577)의 삶과 시세계를 조명하였다. 그는 ‘계문삼처사’의 한 사람으로 평생 초야에 은거하며 학문과 지조를 지켜나간 순수 처사형 학자이다. 그가 추구한 학문은 이론 성리학보다 실천을 중시하는 내면의 심성수양에 무게중심이 있다. 이 같은 학문경향은 조부 농수聾叟 김효로金孝盧로부터 내려오는 가학적家學的 영향과 스승 퇴계 이황의 가르침에 힘입은 것임을 알 수 있다. 그 결과 230여 수가 되는 그의 시문학도 사변적 · 철학적 함의를 담고 있는 철리시 계통의 한시는 거의 없고, 자신이 처한 일상의 환경에서 느끼는 정회를 형상화한 술회시가 대부분이다. 그 술회시의 구체적인 내용을 살펴보면, 스승 퇴계 이황과 학문적으로 주고받은 다수의 시가 수록되어 있고, 또한 자신이 추구한 학문관점의 시적 형상화, 그리고 마지막으로 이황과 매화를 소재로 주고 받은 시가 많다는 점이다. 요컨대, 그의 시문학은 16세기 이황 문하의 관료형 학자가 추구한 학문경향과는 달리, 『심경』의 중시에서 오는 내면의 자기수양과 매화로 표상되는 순수처사의 인간자세, 즉 맑은 인품과 곧은 지조의 문학적 형상화 그것이었다. This study has illuminated the life and poetic world of Hujodang Kim Bu-pil (1516~1588). He was a pure cheo-sa (leading a quiet life in a remote village) type scholar who spent his entire life in a remote village studying and keeping his principles and beliefs. He pursued a study focusing more on cultivating the inner mind that emphasizes action rather than theoretical Neo-Confucianism. This academic inclination has been influenced from the ga-hak (a study of the family handed down for generations) like effect which descended from his grandfather, Nongsu Kim Hyo-ro and the teachings of his teacher Toegye Yi Hwang. As a result, there are almost no Chinese poetry which contain philosophical logic poem lines which possess speculative or philosophical implications among about 230 poems. Most of his poems are effusion poems which embody his feeling and mind derived from his everyday environment If one takes a closer look at the content of the effusion poems, there are a number of poems academically exchanged between him and his teacher Toegye Yi Hwang, poems poetically embodying his academic perspective which he pursues and poems reciting Toegye and maehwa (plum flower) as a subject. In short, his poetry differs from a sixteen century’s academic inclination, which was pursued by a bureaucratic type scholar under Toegye. It was a literary imagery of clear personality and straight principles and beliefs. It was a human attitude of a pure cheo-sa (classic scholar leading quiet life in a remote village) which is presented as inner self-discipline and maehwa from serious consideration in Prajna-Paramita-Sutra.

땅콩나물 생산에서 세근발생 억제 조건에 관한 연구

이규빈(Gyu-Bin Lee),박은지(Eun-Ji Park),허유(You Heo),손병구(Beong-Gu Son),강점순(Jum-Soon Kang) (사)한국생물환경조절학회 2016 생물환경조절학회지 Vol.25 No.3

본 연구는 고품질 땅콩나물 생산을 위해서 세근발생을 억제시키는 생장조절제의 처리 효과를 검정하기 위해 수행되었다. 땅콩나물의 세근발생억제제인 참시루와 6BA를 ‘조평’과 ‘베트남’땅콩에 처리하면 세근발생억제제의 처리농도가 높을수록 세근 발생수는 감소하였다. 그 효과는 6BA가 참시루보다 우수하였고, ‘베트남’ 땅콩보다는 ‘조평’에서 세근발생억제 효과가 명확하였다. 참시루 및 6BA의 배양용액을 1일간 간격으로 교체하면 배양용액을 교체하지 않는 처리구에 비해 부패균 활동을 억제시켜 하배축 생장을 촉진시킨 반면 세근발생은 억제시켜 고품질 땅콩나물 생산이 가능하였다. 땅콩나물 재배의 배양용액에 GA3와 참시루를 혼용하여 처리하면 땅콩나물의 생육을 향상시켰고, 적정 처리조건은 GA3 50mg·L<SUP>-1</SUP> + Chamsiru 8.40mg·L<SUP>-1</SUP> 처리였다. The present study was conducted to establish the suppression condition of lateral root development for producing high-quality peanut sprouts. The result of Chamsiru or 6BA treatment on peanut sprouts ‘Jopyeong’ and ‘Vietnam’ showed that the higher concentration of the solutions showed the better effect for suppressing lateral root development, regardless of the kinds of lateral root inhibitor. Compared to Chamsiru, 6BA showed better effect for suppressing lateral root development, and the effect was more obvious for ‘Jopyeong’ than ‘Vietnam’. The alternant irrigation of Chamsiru and 6BA solution could produce high-quality peanut sprouts by inhibiting bacteria activity in solution and promoting of hypocotyl and root growth, while suppressing the lateral root development. The treatment of mixture solution of GA3 and Chamsiru improved the overall growth of peanut sprouts, and the effect was the highest in the treatment of ‘GA3 50mg·L<SUP>-1</SUP> + Chamsiru 8.40mg·L<SUP>-1</SUP>’.

영화 <아이 엠 샘>과의 비교를 통해 본 <심청가>의 현대적 의미

강미정(Kang, Mi Jeong) 우리문학회 2015 우리文學硏究 Vol.0 No.48

이 글은 <심청가>를 온전히 이해하기 위해서는 효녀 심청에 대한 관심만큼이나 심봉사에 대한 긍정적인 관심이 필요하다는 시각에서 출발한 것이다. 그를 위하여 이 글이 시도한 방법은 심봉사와 유사한 아버지가 등장하는 영화 <아이엠 샘>과의 서사비교와 그를 통한 심봉사에 대한 긍정적 맥락 탐색이었다. 이러한 논의를 통하여 <심청가>는 효자로 성장할 자녀들을 위한 작품에 머물지 않고, 그러한 자녀들을 향한 아버지를 돌아볼 수 있는 작품으로도 이해 가능해진다. 그에 따라 심봉사가 작은 것에서 행복을 찾고, 미래에 대한 걱정보다 미래에 펼쳐질 희망을 먼저 돌아보던 좋은 아버지였음을 알 수 있었다. 또한 <심청가>는 심봉사라는 아버지를 등장시키며 아버지에 대한 성찰을 도모하는 작품이기도 하다. 나아가 <심청가>는 과거로부터 현재와 미래까지 아버지들을 위한 작품이 될 수 있을 것이다. 또 그래야만 <심청가>가 도저히 다가설 수 없는 높은 경지에 있는 효녀의 이야기로만 부유하지 않고, 우리 삶으로 들어오면서 매 순간 나와 아버지, 나와 부모, 그리고 세상과의 화합에 도움을 줄 수 있는 작품으로 안착할 수 있을 것이다. To fully recognize 〈Simcheongga〉, this article start from the view that we need positive attention for Simbongsa, who is Sim-cheong"s father, as much as the interest for devoted daughter Sim-cheong. For this approach, this article suggest the searching a positive context for Simbongsa by comparing the narration of the movie 〈I Am Sam〉 which appears a father figure similar to Simbongsa in 〈Simcheongga〉. Accordingly, we know that Simbongsa was a good father focused on the future hope before the anxiety about the future and found happiness in small things. In this discussion, 〈Simcheongga〉, it wouldn"t to stay on the work for a child who will be the devoted child, expanded to the meaning of work that reappraise the father who has raised a devoted child. And 〈Simcheongga〉 could be the work that soothe the sorriness of fathers, living as someone"s father from the past to the future, on the other hand, always living with some thought what i"ll do nothing for my child. Also 〈Simcheongga〉 is not only the story of devoted daughter in high level that couldn"t approach to them, but it should have set for the work helping the harmony every moment between father and me, and between parents and me, and for the same world between parents and me.

한국만화에 있어 대상의 사실적 표현과 그래픽 노블의 연관관계에 대한 연구

박희복(Park, Hee-Bok),김광수(Kim, Kwang-Su) 한국만화애니메이션학회 2014 만화애니메이션연구 Vol.- No.37

회화에 있어서 대상을 사실적으로 표현한 작품들은 19세기 중반 프랑스에서 G.쿠르베가 당시의 아카데미즘 화풍에 반항하면서 사실주의를 주창하였고 이에 동조하는 H.도미에나 F.밀레와 같은 화가들에 의해 사실주의풍의 작품들이 본격적으로 제작되었다. 이후 사실주의는 미술을 비롯해서 문학영역 전반에까지 확대되었고 예술작품과 문학작품에 지대한 영향을 주었다. 만화 또한 회화의 한 형식으로서 그 역사적 맥락을 같이하며 사실주의적인 만화가 당시의 화가나 만화가들에 의해 제작되어지기 시작하였다. 이러한 사실주의 만화(Realism Comics)는 사실에 기초해서 이야기를 다룬 만화로서 내용적으로는 당대의 사회적 현실을 객관적으로 묘사하고 재현시키는 것이 가장 중요한 목적중의 하나였지만 시각적 측면 즉, 대상의 표현 면에서는 반드시 사실적이라고 단정 지어 말할 수는 없었다. 그러던 중 1980년대 이후 미국과 유럽을 중심으로 만화와 소설의 중간 형식을 띈 그래픽 노블이 탄생하게 되었다. 그래픽 노블은 슈퍼 히어로물이 넘쳐나던 미국 만화시장에 문학성과 예술성이 강한 형식과 양식을 갖추고 나타났으며, 그 주요 특징으로는 내용적으로나 시각적으로나 매우 사실적으로 표현되어 있다는 점이다. 이는 마치 그 서사구조나 그림들이 그래픽으로 연출된 소설이나 문학작품을 보는 듯 복잡하고 섬세하며 예술적 작품성까지 지니고 있다. 그래픽 노블에서 보여 지는 사실적 표현의 특징들은 이전의 만화작품과 비교하여 볼 때 상당히 큰 차이점들을 발견할 수 있다. 시대의 유행을 따르기보다는 개성이 강한 작가주의적 그림 스타일의 특색을 보이며, 작품의 완성도가 상당히 높으면서도 독창적이고 실험적인 표현기법이나 방식들로 인해 회화나 일러스트와 같이 예술작품으로 인정받기 시작했다는 점에서 주목할 만하다. 최근 국내에서도 헐리우드 블록버스터 영화가 잇따라 개봉되어 흥행에 성공하면서부터 원작 그래픽 노블에 대한 관심과 수요가 증가되었다. 따라서 많은 원작 그래픽 노블이 번역되어 판매되기 시작하였고 이러한 세계적인 흐름과 유행에 발맞추어 한국의 일부 작가들이 그래픽 노블류의 작품들을 제작하기 시작하였다. 그러나 그래픽 노블을 표방하며 제작되어진 국내 작품들을 살펴보면 그 형식과 정통성 측면에서 여러 가지 견해가 있다. 이러한 시점에서 본 연구는 한국적 그래픽 노블의 대표적 작품이라고 할 수 있는 권가야의 <남한산성>에 초점을 맞추었으며, 특히, 대상의 사실적 표현이라는 시각적 측면에 중점을 두고 그 특징들과 유사성 등을 분석해보고자 한다. 본 연구를 통해 국내 그래픽 노블에 대한 정체성과 현주소를 되짚어보고 미국이나 유럽 그리고 일본의 그래픽 노블과는 차별화된 우리만의 독창적인 소재를 개발, 활용함으로써 한국적 그래픽 노블이 경쟁력을 갖춘 만화의 한 장르로 더욱 발전할 수 있도록 모색하는 계기가 되었으면 한다. 더 나아가 침체되어 있는 국내 만화시장에 새로운 활력소가 되기를 희망한다. Regarding works that express objects realistically in painting, Gustave Courbet advocated realism in the mid-19th century, France, resisting the then academist style of painting, and works in realist style were produced in earnest by painters such as H. Daumier or Jean F. Millet, who went along with him. Later, realism has expanded into the realm of general literature, including fine art, which has had profound impacts on works of art and literary works. In comics, too, in the same historical context as a form of painting, realistic comics began to be produced by painters or cartoonists at the time. These realism comics are those dealing with stories based on facts, and in terms of contents, objective description and representation of the social realities of the times is one of the most important objectives, but it could not be concluded that in their visual aspect, that is, that of expressing the objects, they were realistic. In the meantime, a graphic novel was born, which was the intermediate form between comics and novels around the United States and Europe since the 1980s. Graphic novels appeared in forms and styles with strong literary and artistic values in the comics market in the U.S. which was full of the superhero genre (comics around heroes), and their major characteristics are very realistic expressions in terms of contents and visual aspect. They are complex and delicate and even have artistic, literary values as if readers read a fiction or literary work of which its narrative structures or pictures are produced with graphics. The characteristics of realistic expressions shown in graphic novels are very different from the previous works of comics. It is noteworthy that they began to be acknowledged as works of art like painting or illustration, thanks to their features of strongly individual auteurist painting style, a fairly high degree of completion of the works, and creative and experimental expression techniques or methods, instead of following the fashion of the times. In recent years, in South Korea, Hollywood blockbuster films have been released one after another and become box office hits, there are increasing interest and demand for the original graphic novels. Accordingly, many original graphic novels have been translated and started to be sold, and keeping pace with this global flow of fashion, some writers in Korea began to produce works of graphic novels. However, to look into the domestic works produced claiming to be graphic novels, there are various opinions on their format and authenticity. In this sense, this study focused on Ga-ya Kwon’s Namhansanseong, one the representative works of Korean style graphic novels, and in particular, it attempted to analyze their characteristics and commonalities focusing on the visual aspect of realistic expressions of objects. It is expected that there would be an opportunity to seek for ways so that Korean style graphic novel can be further developed as a genre of comics, with competitiveness by looking back on the identity and present state of domestic graphic novels and developing and applying Korea’s original subject matters differentiated from those of graphic novels in the U.S., Europe or Japan through this study. In addition, it is desired that they will be a new energizer for the stagnant domestic comics market.

Fabrication of wide-bandgap β-Cu(In,Ga)<SUB>3</SUB>Se<SUB>5</SUB> thin films and their application to solar cells

Ji Hye Kim,Young Min Shin,Seung Tae Kim,HyukSang Kwon,Byung Tae Ahn 한국태양광발전학회 2013 Current Photovoltaic Research Vol.1 No.1

Cu(In,Ga)3Se5 is a candidate material for the top cell of Cu(In,Ga)Se2 tandem cells. This phase is often found at the surface of the Cu(In,Ga)Se2 film during Cu(In,Ga)Se2 cell fabrication, and plays a positive role in Cu(In,Ga)Se2 cell performance. However, the exact properties of the Cu(In,Ga)3Se5 film have not been extensively studied yet. In this work, Cu(In,Ga)3Se5 films were fabricated on Mocoated soda-lime glass substrates by a three-stage co-evaporation process. The Cu content in the film was controlled by varying the deposition time of each stage. X-ray diffraction and Raman spectroscopy analyses showed that, even though the stoichiometric Cu/(In+Ga) ratio is 0.25, Cu(In,Ga)3Se5 is easily formed in a wide range of Cu content as long as the Cu/(In+Ga) ratio is held below 0.5. The optical band gap of Cu0.3(In0.65Ga0.35)3Se5 composition was found to be 1.35eV. As the Cu/(In+Ga) ratio was decreased further below 0.5, the grain size became smaller and the band gap increased. Unlike the Cu(In,Ga)Se2 solar cell, an external supply of Na with Na2S deposition further increased the cell efficiency of the Cu(In,Ga)3Se5 solar cell, indicating that more Na is necessary, in addition to the Na supply from the soda lime glass, to suppress deep level defects in the Cu(In,Ga)3Se5 film. The cell efficiency of CdS/Cu(In,Ga)3Se5 was improved from 8.8 to 11.2% by incorporating Na with Na2S deposition on the CIGS film. The fill factor was significantly improved by the Na incorporation, due to a decrease of deep-level defects.

Beyond-CMOS: Impact of Side-Recess Spacing on the Logic Performance of 50 ㎚ In<SUB>0.7</SUB>Ga<SUB>0.3</SUB>As HEMTs

Dae-Hyun Kim,Jesus A. del Alamo,Jae-Hak Lee,Kwang-Seok Seo 대한전자공학회 2006 Journal of semiconductor technology and science Vol.6 No.3

We have been investigating InGaAs HEMTs as a future high-speed and low-power logic technology for beyond CMOS applications. In this work, we have experimentally studied the role of the side-recess spacing (Lside) on the logic performance of 50 ㎚ In0.7Ga0.3As HEMTs. We have found that Lside has a large influence on the electrostatic integrity (or short channel effects), gate leakage current, gate-drain capacitance, and source and drain resistance of the device. For our device design, an optimum value of Lside of 150 ㎚ is found. 50 ㎚ In0.7Ga0.3As HEMTs with this value of Lside exhibit ION/IOFF ratios in excess of 10⁴, subthreshold slopes smaller than 90 ㎷/dec, and logic gate delays of about 1.3 ps at a VCC of 0.5 V. In spite of the fact that these devices are not optimized for logic, these values are comparable to state-of-theart MOSFETs with similar gate lengths. Our work confirms that in the landscape of alternatives for beyond CMOS technologies, InAs-rich InGaAs FETs hold considerable promise.